Encoding formats – Medialooks Help Center

All CPU codecs from the following table is the FFMpeg based video codecs. GPU codecs is a custom implementation of Medialooks team.

AAC (Audio File, ADTS)

Configuration Parameter: adts

Extensions: aac

Video codecs

No Video (Disabled)

Audio codecs

AAC (Advanced Audio Coding)

AC-3 (Audio File)

Configuration Parameter: ac3

Extensions: ac3

Video codecs

No Video (Disabled)

Audio codecs

AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)

ASF (Advanced Streaming Format)

Configuration Parameter: asf

Extensions: asf,wmv,wma

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	string		Ignore video sample times. Possible values: true, false

Video codecs

Default format codec
DV / DVCPRO HD (SW)
FLV / Sorenson Spark (H.263, SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
HuffYUV (Lossless, SW)
MJPEG (Motion JPEG, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
VP8 (Google, SW)
VP9 (Google, SW)
WMV8 (Windows Media Video 8, SW)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
ADPCM Microsoft
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Ogg Vorbis
PCM 16-bit Signed LE
PCM 24-bit Signed LE
PCM 32-bit Signed LE
PCM 32-bit Float LE
No Audio (Disabled)

AVI (Audio Video Interleaved)

Configuration Parameter: avi

Extensions: avi

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false
reserve_index_space	int	0	Reserve space (in bytes) at the beginning of the file for each stream index
write_channel_mask			Write the channel layout mask into the audio stream header. This option is enabled by default. Disabling the channel mask can be useful in specific scenarios, e.g. when merging multiple audio streams into one for compatibility with software that only supports a single audio stream in AVI

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
DPX (Digital Picture eXchange, SW)
FFV1 (Lossless, SW)
FLV / Sorenson Spark (H.263, SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
Hap (Vidvox, SW)
HuffYUV (Lossless, SW)
JPEG 2000 (OpenJPEG, SW)
MJPEG (Motion JPEG, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
PNG (Image Sequence, SW)
Uncompressed 4:2:2 8-bit (SW)
Uncompressed 4:2:2 10-bit (SW)
VP8 (Google, SW)
VP9 (Google, SW)
WMV8 (Windows Media Video 8, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
ADPCM Microsoft
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Ogg Vorbis
PCM 16-bit Signed LE
PCM 24-bit Signed LE
PCM 32-bit Signed LE
PCM 32-bit Float LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

DV (Digital Video)

Configuration Parameter: dv

Extensions: dv

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false

Video codecs

DV (Digital Video)

Audio codecs

PCM 16-bit Signed LE
No Audio (Disabled)

DVB-Compatible Streaming (MPEG-TS DVB)

Configuration Parameter: dvb

Extensions: udp://

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into MPEG transport stream
service_name	string	MService001	Set Service Name
service_provider	string	Medialooks	Set Service Provider
transport_stream_id	int	1	Set the transport_stream_id. This identifies a transponder in DVB. Default is 0x0001
original_network_id	int	1	Set the original_network_id. This is unique identifier of a network in DVB. Its main use is in the unique identification of a service through the path Original_Network_ID, Transport_Stream_ID. Default is 0x0001
muxrate	int	1	Set a constant muxrate. Default is VBR
service_id	int	1	Set service_id field
service_type	option_fixed	digital_tv	Service type
pmt_start_pid	int	192	Set the first pid of the PMT
start_pid	int	1024	Set the first pid
pes_payload_size	int	2930	Set minimum PES packet payload in bytes. Default is 2930
mpegts_flags	flags	+system_b	MPEG-TS muxing flags Reemit PAT/PMT before writing the next packetReemit PAT and PMT at each video frameUse LATM packetization for AACConform to System B (DVB) instead of System A (ATSC)
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
resend_headers	int	0	Reemit PAT/PMT before writing the next packet
tables_version	int	0	Set PAT, PMT, SDT and NIT version (default 0, valid values are from 0 to 31, inclusively). This option allows updating stream structure so that standard consumer may detect the change
rc_buffers	int	8	Rate-Control buffers
rc_sync_msec	int	1	Rate-Control precision (in msec, miminum 1 msec)
rc_max_underflow_msec	int	30	Rate-Control max underflow time, after this time the clock corrected (in msec)
pcr_period	int	20	Override the default PCR retransmission time in milliseconds. Default is -1 which means that the PCR interval will be determined automatically: 20 ms is used for CBR streams, the highest multiple of the frame duration which is less than 100 ms is used for VBR streams
pat_period	double	0.1	PAT/PMT retransmission time limit in seconds (default 100 msec)
sdt_period	double	0.5	SDT retransmission time limit in seconds (default 500 msec, no transmit -1)
nit_period	double	9.0	NIT retransmission time limit in seconds (default 3 s, no transmit -1)
tdt_period	double	25.0	TDT retransmission time limit in seconds (default 10 s, no transmit -1)
eit_period	double	1.5	EIT present/following retransmission time limit in seconds (default 0.5 s, no transmit -1)
flush_packets	int	-1	Enable flushing of the I/O context after each packet
max_delay	int	700000	Set maximum multiplexing PTS/PCR delay in microseconds
start_pcr	double	0.0	Set the start PCR value in second
muxer.buffer_min	int	5	Set number of packets that should be accumulated in the multiplexer queue before processing begins
muxer.buffer_max	int	10	Set maximum multiplexer packets queue size

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

DVD Video (VOB Files)

Configuration Parameter: vob

Extensions: vob

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	string		Ignore video sample times. Possible values: true, false
muxrate	int	0	The combined rate of all video and audio elementary stream packets common to one program. This rate also includes the VBI and sub-picture private stream data, which MPEG treats as a private stream type
preload	int	500000	Initial demux-decode delay in microseconds

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
No Video (Disabled)

Audio codecs

Default format codec
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
No Audio (Disabled)

FLV (Flash Video)

Configuration Parameter: flv

Extensions: flv

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	string		Ignore video sample times. Possible values: true, false

Video codecs

Default format codec
FLV / Sorenson Spark (H.263, SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
No Video (Disabled)

Audio codecs

AAC (Advanced Audio Coding)
PCM 16-bit Signed LE
No Audio (Disabled)

GXF (General eXchange Format)

Configuration Parameter: gxf

Extensions: gxf

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false

Video codecs

MPEG-2 Video PAL
MPEG-2 Video NTSC

Audio codecs

PCM 16-bit Signed LE
No Audio (Disabled)

HLS Streaming (Apple HTTP Live Streaming)

Configuration Parameter: hls

Extensions: m3u8

Additional attributes

Name	Type	Default	Description
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into HLS stream
start_number	int64	0	Start the playlist sequence number (#EXT-X-MEDIA-SEQUENCE) from the specified number when hls_start_number_source value is generic. (This is the default case.) Unless hls_flags single_file is set, it also specifies starting sequence numbers of segment and subtitle filenames. Default value is 0
hls_time	double	2.0	Set the target segment length. Default value is 2. Ð’uration must be a time duration specification. Segment will be cut on the next key frame after this time has passed
hls_init_time	double	0.0	Set the initial target segment length. Default value is 0. Duration must be a time duration specification. Segment will be cut on the next key frame after this time has passed on the first m3u8 list. After the initial playlist is filled, ffmpeg will cut segments at duration equal to hls_time
hls_list_size	int	5	Set the maximum number of playlist entries. If set to 0 the list file will contain all the segments. Default value is 5
hls_delete_threshold	int	1	Set the number of unreferenced segments to keep on disk before hls_flags delete_segments deletes them. Increase this to allow continue clients to download segments which were recently referenced in the playlist. Default value is 1, meaning segments older than hls_list_size+1 will be deleted
hls_ts_options	string		Set hls mpegts list of options for the container format used for hls
hls_vtt_options	string		Set hls vtt list of options for the container format used for hls
hls_wrap	int	0	Set number after which the index wraps (will be deprecated)
hls_allow_cache	int	-1	Explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments
hls_base_url	string		Append baseurl to every entry in the playlist. Useful to generate playlists with absolute paths. Note that the playlist sequence number must be unique for each segment and it is not to be confused with the segment filename sequence number which can be cyclic, for example if the wrap option is specified
hls_segment_filename	string		Set the segment filename. Unless the hls_flags option is set with â€˜single_fileâ€™, filename is used as a string format with the segment number appended
hls_segment_size	int	0	Maximum size per segment file (in bytes)
hls_key_info_file	string		Use the information in key_info_file for segment encryption. The first line of key_info_file specifies the key URI written to the playlist. The key URL is used to access the encryption key during playback. The second line specifies the path to the key file used to obtain the key during the encryption process. The key file is read as a single packed array of 16 octets in binary format. The optional third line specifies the initialization vector (IV) as a hexadecimal string to be used instead of the segment sequence number (default) for encryption. Changes to key_info_file will result in segment encryption with the new key/IV and an entry in the playlist for the new key URI/IV if hls_flags periodic_rekey is enabled
hls_enc			Enable (1) or disable (0) the AES128 encryption. When enabled every segment generated is encrypted and the encryption key is saved as playlist name.key
hls_enc_key	string		Specify a 16-octet key to encrypt the segments, by default it is randomly generated
hls_enc_key_url	string		If set, keyurl is prepended instead of baseurl to the key filename in the playlist
hls_enc_iv	string		Specify the 16-octet initialization vector for every segment instead of the autogenerated ones
hls_subtitle_path	string		Set path of hls subtitles
hls_segment_type	option	mpegts	Set hls segment files type
segment_type			Output segment files in MPEG-2 Transport Stream format. This is compatible with all HLS versionsOutput segment files in fragmented MP4 format, similar to MPEG-DASH. fmp4 files may be used in HLS version 7 and above
hls_fmp4_init_filename	string	init.mp4	Set filename for the fragment files header file, default filename is init.mp4. When strftime is enabled, filename is expanded to the segment filename with localtime
hls_flags	flags		Set flags affecting HLS playlist and media file generation
flags			If this flag is set, the muxer will store all segments in a single MPEG-TS file, and will use byte ranges in the playlist. HLS playlists generated with this way will have the version number 4Write segment data to filename.tmp and rename to filename only once the segment is completeSegment files removed from the playlist are deleted after a period of time equal to the duration of the segment plus the duration of the playlistRound the duration info in the playlist file segment info to integer values, instead of using floating point. If there are no other features requiring higher HLS versions be used, then this will allow ffmpeg to output a HLS version 2 m3u8Add the #EXT-X-DISCONTINUITY tag to the playlist, before the first segmentâ€™s informationDo not append the EXT-X-ENDLIST tag at the end of the playlistAllow segments to start on frames other than key frames. This improves behavior on some players when the time between key frames is inconsistent, but may make things worse on others, and can cause some oddities during seeking. This flag should be used with the hls_time optionAppend new segments into the end of old segment list, and remove the #EXT-X-ENDLIST from the old segment listGenerate EXT-X-PROGRAM-DATE-TIME tagsMake it possible to use segment indexes as %%d in the hls_segment_filename option expression besides date/time values when strftime option is on. To get fixed width numbers with trailing zeroes, %%0xd format is available where x is the required widthMake it possible to use segment duration (calculated in microseconds) as %%t in hls_segment_filename option expression besides date/time values when strftime is on. To get fixed width numbers with trailing zeroes, %%0xt format is available where x is the required widthMake it possible to use segment sizes (counted in bytes) as %%s in hls_segment_filename option expression besides date/time values when strftime is on. To get fixed width numbers with trailing zeroes, %%0xs format is available where x is the required widthThe file specified by hls_key_info_file will be checked periodically and detect updates to the encryption info. Be sure to replace this file atomically, including the file containing the AES encryption keyAdd the #EXT-X-INDEPENDENT-SEGMENTS tag to playlists that has video segments and when all the segments of that playlist are guaranteed to start with a key frame
use_localtime			Set filename expansion with strftime at segment creation
use_localtime_mkdir			Create last directory component in strftime-generated filename
hls_playlist_type	option		Set the HLS playlist type
pl_type			Emit #EXT-X-PLAYLIST-TYPE:EVENT in the m3u8 header. This forces hls_list_size to 0; the playlist can only be appended toEmit #EXT-X-PLAYLIST-TYPE:VOD in the m3u8 header. This forces hls_list_size to 0; the playlist must not change
method	string		Use the given HTTP method to create the hls files (default: PUT)
hls_start_number_source	option	generic	Start the playlist sequence number (#EXT-X-MEDIA-SEQUENCE) according to the specified source. Unless hls_flags single_file is set, it also specifies source of starting sequence numbers of segment and subtitle filenames. In any case, if hls_flags append_list is set and read playlist sequence number is greater than the specified start sequence number, then that value will be used as start value
start_sequence_source_type			start_number value (default)seconds since epochcurrent datetime as YYYYMMDDhhmmss
http_user_agent	string		Override User-Agent field in HTTP header. Applicable only for HTTP output
var_stream_map	string		Specify a map string defining how to group the audio, video and subtitle streams into different variant streams. The variant stream groups are separated by space. Expected string format is like this "a:0,v:0 a:1,v:1 ....". Here a:, v:, s: are the keys to specify audio, video and subtitle streams respectively. Allowed values are 0 to 9 (limited just based on practical usage)
cc_stream_map	string		Map string which specifies different closed captions groups and their attributes. The closed captions stream groups are separated by space. The closed captions groups configured using this option are mapped to different variant streams by providing the same ccgroup name in the var_stream_map string
master_pl_name	string		Create HLS master playlist with the given name
master_pl_publish_rate	int	0	Publish master play list repeatedly every after specified number of segment intervals
http_persistent			Use persistent HTTP connections. Applicable only for HTTP output
timeout			Set timeout for socket I/O operations. Applicable only for HTTP output

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

Icecast Streaming (Ogg / MP3)

Configuration Parameter: icecast

Extensions: icecast://

Additional attributes

Name	Type	Default	Description
ice_genre	string		Set the stream genre
ice_name	string		Set the stream name
ice_description	string		Set the stream description
ice_url	string		Set the stream website URL
ice_public	bool	false	Set if the stream should be public. The default is false (not public)
user_agent	string		Override the User-Agent header. If not specified a string of the form "Lavf/<version>" will be used
password	string		Set the Icecast mountpoint password
content_type	string		Set the stream content type. This must be set if it is different from audio/mpeg
legacy_icecast	bool	false	This enables support for Icecast versions less 2.4.0, that do not support the HTTP PUT method but the SOURCE method
tls	bool	false	Establish a TLS (HTTPS) connection to Icecast
metadata_update_url	string		Set the Icecast metadata update url
metadata_update_credentials	string		Set the Icecast metadata update credentials (login:password)

Video codecs

No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
FLAC (Free Lossless)
MP3 (LAME, MPEG Audio Layer 3)
Ogg Vorbis
No Audio (Disabled)

IIS Live Smooth Streaming

Configuration Parameter: ismv

Extensions: http://

Video codecs

AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (x265, SW)
VC-1 (Windows Media Video, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

AAC (Advanced Audio Coding)
Direct Stream Copy (No Re-Encoding)

Image Sequence (Still Frames)

Configuration Parameter: image2

Extensions: dpx,png,jpg,tiff,tga,j2c

Additional attributes

Name	Type	Default	Description
create_folder	bool	true	Create folder for image sequence

Video codecs

DPX (Digital Picture eXchange, SW)
MJPEG (Motion JPEG, SW)
PNG (Image Sequence, SW)

Audio codecs

WAV (Wave Audio File)
No Audio (Disabled)

MKV (Matroska)

Configuration Parameter: matroska

Extensions: mkv

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	string		Ignore video sample times. Possible values: true, false
reserve_index_space	int	0	Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues)
cluster_size_limit	int	-1	Store at most the provided amount of bytes in a cluster. If not specified, the limit is set automatically to a sensible hardcoded fixed value
cluster_time_limit	int	-1	Store at most the provided number of milliseconds in a cluster. If not specified, the limit is set automatically to a sensible hardcoded fixed value
dash			Create a WebM file conforming to WebM DASH specification. By default it is set to false
dash_track_number	int	1	Track number for the DASH stream. By default it is set to 1
live			Write files assuming it is a live stream. By default it is set to false
allow_raw_vfw			Allow raw VFW mode. By default it is set to false
write_crc32			Write a CRC32 element inside every Level 1 element. By default it is set to true. This option is ignored for WebM

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
AV1 (NVIDIA NVENC, HW)
Apple ProRes (Legacy, SW)
Apple ProRes (iCodec Pro, SW)
DV / DVCPRO HD (SW)
FFV1 (Lossless, SW)
FLV / Sorenson Spark (H.263, SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
HuffYUV (Lossless, SW)
JPEG XS (SVT, SW)
MJPEG (Motion JPEG, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
VP8 (Google, SW)
VP9 (Google, SW)
WMV8 (Windows Media Video 8, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
ALAC (Apple Lossless)
MP2 (MPEG Audio Layer 2)
PCM 16-bit Signed LE
PCM 24-bit Signed LE
PCM 32-bit Signed LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

MOV (QuickTime File Format)

Configuration Parameter: mov

Extensions: mov

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false
movflags	flags		MOV muxer flags Add RTP hint tracksMake the initial moov atom emptyStart a new fragment at each video keyframeFragment at every frameWrite separate moof/mdat atoms for each trackFlush fragments on caller requestsCreate a live smooth streaming feed (for pushing to a publishing point)Run a second pass to put the index (moov atom) at the beginning of the fileOmit the base data offset in tfhd atomsDisable Nero chapter atomSet the default-base-is-moof flag in tfhd atomsWrite DASH compatible fragmented MP4Signal that the next fragment is discontinuous from earlier onesDelay writing the initial moov until the first fragment is cut, or until the first fragment flushWrite a global sidx index at the start of the fileWrite colr atom (Experimental, may be renamed or changed, do not use from scripts)Write deprecated gama atomUse mdta atom for metadata.Skip writing the mfra/tfra/mfro trailer for fragmented filesUse negative CTS offsets (reducing the need for edit lists)
moov_size	int	0	Reserves space for the moov atom at the beginning of the file instead of placing the moov atom at the end. If the space reserved is insufficient, muxing will fail
rtpflags	flags		RTP muxer flags Use MP4A-LATM packetization instead of MPEG4-GENERIC for AACUse RFC 2190 packetization instead of RFC 4629 for H.263Don't send RTCP sender reportsUse mode 0 for H.264 in RTPSend RTCP BYE packets when finishing
skip_iods			Skip writing iods atom
iods_audio_profile	int	-1	Specify iods number for the audio profile atom (from -1 to 255), default is -1
iods_video_profile	int	-1	Specify iods number for the video profile atom (from -1 to 255), default is -1
frag_duration	int	0	Create fragments that are duration microseconds long
min_frag_duration	int	0	Do not create fragments that are shorter than duration microseconds long
frag_size	int	0	Create fragments that contain up to size bytes of payload data
ism_lookahead	int	0	Specify number of lookahead entries for ISM files (from 0 to 255), default is 0
video_track_timescale	int	0	Set the timescale used for video tracks. Range is 0 to INT_MAX. If set to 0, the timescale is automatically set based on the native stream time base. Default is 0
brand	string		Override major brand
use_editlist			Use edit list (default value is auto)
fragment_index	int	1	Fragment number of the next fragment
mov_gamma	double	0.000000	Specify gamma value for gama atom (as a decimal number from 0 to 10), default is 0.0, must be set together with + movflags
frag_interleave	int	0	Interleave samples within fragments (max number of consecutive samples, lower is tighter interleaving, but with more overhead. It is set to 0 by default
encryption_scheme	string		Configures the encryption scheme, allowed values are none, cenc-aes-ctr
encryption_key			Set the media encryption key in hexadecimal format
encryption_kid			Set the media encryption key identifier in hexadecimal format
use_stream_ids_as_track_ids			Use stream ids as track ids
write_tmcd			Force or disable writing tmcd
display_rotation	double		Set video rotation metadata. Rotation is a decimal number specifying the amount in degree by which the video should be rotated counter-clockwise before being displayed

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
Apple ProRes (Legacy, SW)
Apple ProRes (iCodec Pro, SW)
DPX (Digital Picture eXchange, SW)
DV / DVCPRO HD (SW)
FFV1 (Lossless, SW)
FLV / Sorenson Spark (H.263, SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
Hap (Vidvox, SW)
HuffYUV (Lossless, SW)
JPEG XS (SVT, SW)
MJPEG (Motion JPEG, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
PNG (Image Sequence, SW)
QuickTime Animation (RLE, SW)
Uncompressed 4:2:2 8-bit (SW)
Uncompressed 4:2:2 10-bit (SW)
WMV8 (Windows Media Video 8, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
ADPCM IMA QuickTime
ADPCM Microsoft
ALAC (Apple Lossless)
E-AC-3 (Dolby Digital Plus)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Ogg Vorbis
PCM 16-bit Signed LE
PCM 24-bit Signed LE
PCM 32-bit Signed LE
PCM 32-bit Float LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

MOV DNxHD (QuickTime with DNxHD)

Configuration Parameter: mov_dnxhd

Extensions: mov

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false
movflags	flags		MOV muxer flags Fragment at video keyframesThis data is usually written at the end of the file, but it can be moved to the start for better playback by adding +faststart to the movflags
moov_size	int	0	Reserves space for the moov atom at the beginning of the file instead of placing the moov atom at the end. If the space reserved is insufficient, muxing will fail
skip_iods	int		Skip writing iods atom
iods_audio_profile	int	-1	Specify iods number for the audio profile atom (from -1 to 255), default is -1
iods_video_profile	int	-1	Specify iods number for the video profile atom (from -1 to 255), default is -1
frag_duration	int	0	Create fragments that are duration microseconds long
min_frag_duration	int	0	Specify the minimum fragment duration (in microseconds)
frag_size	int	0	Create fragments that contain up to size bytes of payload data
display_rotation	double		Set video rotation metadata. Rotation is a decimal number specifying the amount in degree by which the video should be rotated counter-clockwise before being displayed

Video codecs

DNxHD 1080 60p
DNxHD 1080 59p
DNxHD 1080 50p
DNxHD 1080 59i
DNxHD 1080 25p
DNxHD 1080 24p
DNxHD 1080 23p
DNxHD 1080 29p
DNxHD 720 59p
DNxHD 720 50p
DNxHR LB 4K_DCI 60p
DNxHR LB 4K_DCI 59p
DNxHR LB 4K_DCI 50p
DNxHR LB 4K_DCI 30p
DNxHR LB 4K_DCI 29p
DNxHR LB 4K_DCI 25p
DNxHR LB 4K_DCI 24p
DNxHR LB 4K_DCI 23p
DNxHR LB 4K_UHD 60p
DNxHR LB 4K_UHD 59p
DNxHR LB 4K_UHD 50p
DNxHR LB 4K_UHD 30p
DNxHR LB 4K_UHD 29p
DNxHR LB 4K_UHD 25p
DNxHR LB 4K_UHD 24p
DNxHR LB 4K_UHD 23p
DNxHR LB 2K_DCI 60p
DNxHR LB 2K_DCI 59p
DNxHR LB 2K_DCI 50p
DNxHR LB 2K_DCI 30p
DNxHR LB 2K_DCI 29p
DNxHR LB 2K_DCI 25p
DNxHR LB 2K_DCI 24p
DNxHR LB 2K_DCI 23p
DNxHR SQ 4K_DCI 60p
DNxHR SQ 4K_DCI 59p
DNxHR SQ 4K_DCI 50p
DNxHR SQ 4K_DCI 30p
DNxHR SQ 4K_DCI 29p
DNxHR SQ 4K_DCI 25p
DNxHR SQ 4K_DCI 24p
DNxHR SQ 4K_DCI 23p
DNxHR SQ 4K_UHD 60p
DNxHR SQ 4K_UHD 59p
DNxHR SQ 4K_UHD 50p
DNxHR SQ 4K_UHD 30p
DNxHR SQ 4K_UHD 29p
DNxHR SQ 4K_UHD 25p
DNxHR SQ 4K_UHD 24p
DNxHR SQ 4K_UHD 23p
DNxHR SQ 2K_DCI 60p
DNxHR SQ 2K_DCI 59p
DNxHR SQ 2K_DCI 50p
DNxHR SQ 2K_DCI 30p
DNxHR SQ 2K_DCI 29p
DNxHR SQ 2K_DCI 25p
DNxHR SQ 2K_DCI 24p
DNxHR SQ 2K_DCI 23p
DNxHR HQ 4K_DCI 60p
DNxHR HQ 4K_DCI 59p
DNxHR HQ 4K_DCI 50p
DNxHR HQ 4K_DCI 30p
DNxHR HQ 4K_DCI 29p
DNxHR HQ 4K_DCI 25p
DNxHR HQ 4K_DCI 24p
DNxHR HQ 4K_DCI 23p
DNxHR HQ 4K_UHD 60p
DNxHR HQ 4K_UHD 59p
DNxHR HQ 4K_UHD 50p
DNxHR HQ 4K_UHD 30p
DNxHR HQ 4K_UHD 29p
DNxHR HQ 4K_UHD 25p
DNxHR HQ 4K_UHD 24p
DNxHR HQ 4K_UHD 23p
DNxHR HQ 2K_DCI 60p
DNxHR HQ 2K_DCI 59p
DNxHR HQ 2K_DCI 50p
DNxHR HQ 2K_DCI 30p
DNxHR HQ 2K_DCI 29p
DNxHR HQ 2K_DCI 25p
DNxHR HQ 2K_DCI 24p
DNxHR HQ 2K_DCI 23p
No Video

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
ADPCM IMA QuickTime
ADPCM Microsoft
ALAC (Apple Lossless)
E-AC-3 (Dolby Digital Plus)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Ogg Vorbis
PCM 16-bit Signed LE
PCM 24-bit Signed LE
PCM 32-bit Signed LE
PCM 32-bit Float LE
No Audio (Disabled)

MP3 (LAME, MPEG Audio Layer 3)

Configuration Parameter: mp3

Extensions: mp3

Additional attributes

Name	Type	Default	Description
id3v2_version	int	4	Select ID3v2 version to write. Currently 3 and 4 are supported
write_id3v1	int	0	Enable ID3v1 writing. ID3v1 tags are written in UTF-8 which may not be supported by most software

Video codecs

No Video (Disabled)

Audio codecs

MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)

MP4 (MPEG-4 Part 14)

Configuration Parameter: mp4

Extensions: mp4

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_tc	bool	false	Enable embedding Time Code into elementary video stream (for H.264 video only)
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	string		Ignore video sample times. Possible values: true, false
movflags	flags		MOV muxer flags Add RTP hint tracksMake the initial moov atom emptyFragment at video keyframesFragment at every frameWrite separate moof/mdat atoms for each trackFlush fragments on caller requestsCreate a live smooth streaming feed (for pushing to a publishing point)Run a second pass to put the index (moov atom) at the beginning of the fileOmit the base data offset in tfhd atomsDisable Nero chapter atomSet the default-base-is-moof flag in tfhd atomsWrite DASH compatible fragmented MP4Signal that the next fragment is discontinuous from earlier onesDelay writing the initial moov until the first fragment is cut, or until the first fragment flushWrite a global sidx index at the start of the fileWrite colr atom (Experimental, may be renamed or changed, do not use from scripts)Write deprecated gama atomUse mdta atom for metadata.Skip writing the mfra/tfra/mfro trailer for fragmented filesUse negative CTS offsets (reducing the need for edit lists)
moov_size	int		Reserves space for the moov atom at the beginning of the file instead of placing the moov atom at the end. If the space reserved is insufficient, muxing will fail
rtpflags	flags		RTP muxer flags Use MP4A-LATM packetization instead of MPEG4-GENERIC for AACUse RFC 2190 packetization instead of RFC 4629 for H.263Don't send RTCP sender reportsUse mode 0 for H.264 in RTPSend RTCP BYE packets when finishing
skip_iods			Skip writing iods atom
iods_audio_profile	int	-1	Specify iods number for the audio profile atom (from -1 to 255), default is -1
iods_video_profile	int	-1	Specify iods number for the video profile atom (from -1 to 255), default is -1
frag_duration	int	0	Create fragments that are duration microseconds long
min_frag_duration	int	0	Do not create fragments that are shorter than duration microseconds long
frag_size	int	0	Create fragments that contain up to size bytes of payload data
ism_lookahead	int	0	Specify number of lookahead entries for ISM files (from 0 to 255), default is 0
video_track_timescale	int	0	Set the timescale used for video tracks. Range is 0 to INT_MAX. If set to 0, the timescale is automatically set based on the native stream time base. Default is 0
brand	string		Override major brand
use_editlist			Use edit list (default value is auto)
fragment_index	int	1	Specify gamma value for gama atom (as a decimal number from 0 to 10), default is 0.0, must be set together with + movflags
mov_gamma	double	0.0	gamma value for gama atom
frag_interleave	int	0	Interleave samples within fragments (max number of consecutive samples, lower is tighter interleaving, but with more overhead)
encryption_scheme	string		Configures the encryption scheme, allowed values are none, cenc-aes-ctr
encryption_key			Set the media encryption key in hexadecimal format
encryption_kid			Set the media encryption key identifier in hexadecimal format
use_stream_ids_as_track_ids			Use stream ids as track ids
write_tmcd			Specify on to force writing a timecode track, off to disable it and auto to write a timecode track only for mov and mp4 output (default)
display_rotation	double		Set video rotation metadata. Rotation is a decimal number specifying the amount in degree by which the video should be rotated counter-clockwise before being displayed

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
AV1 (NVIDIA NVENC, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
JPEG XS (SVT, SW)
MJPEG (Motion JPEG, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Ogg Vorbis
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

MPEG Program Stream (PS)

Configuration Parameter: mpeg

Extensions: mpg,mpeg

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	bool	true	Ignore video sample times. Possible values: true, false
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
muxrate	int	0	Set user-defined mux rate expressed as a number of bits/s. If not specied the automatically computed mux rate is employed. Default value is 0
preload	int		Set initial demux-decode delay in microseconds

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-1 Video (SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

MPEG Transport Stream (TS File)

Configuration Parameter: mpegts

Extensions: ts,m2t,m2ts,mts

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into MPEG transport stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
ignore_pts	string		Ignore video sample times. Possible values: true, false
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
mpegts_transport_stream_id	int	1	Set the transport_stream_id field. This identifies a transponder in DVB. Default is 0x0001
mpegts_original_network_id	int	65281	Set the original_network_id. This is unique identifier of a network in DVB. Its main use is in the unique identification of a service through the path Original_Network_ID, Transport_Stream_ID
mpegts_service_id	int	1	Set the service_id, also known as program in DVB. Default is 0x0001
mpegts_service_type	option	digital_tv	Set service_type field. Digital Television serviceDigital Radio serviceTeletext serviceAdvanced Codec Digital Radio serviceMPEG2 Digital HDTV serviceAdvanced Codec Digital SDTV serviceAdvanced Codec Digital HDTV serviceHEVC Digital Television service
mpegts_pmt_start_pid	int	4096	Set the first PID for PMTs. Default is 0x1000, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the PMT PID is fixed 0x0100
mpegts_start_pid	int	256	Set the first PID for elementary streams. Default is 0x0100, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the elementary stream PIDs are fixed
mpegts_m2ts_mode			Enable m2ts mode if set to 1. Default value is -1 which disables m2ts mode
muxrate	int		Set a constant muxrate (in bits/s). Default is VBR
pes_payload_size	int		Set minimum PES packet payload in bytes. Default is 2930
mpegts_flags	flags		Set mpegts flags. Accepts the following options Reemit PAT/PMT before writing the next packetUse LATM packetization for AACReemit PAT and PMT at each video frameConform to System B (DVB) instead of System A (ATSC)Mark initial packets as discontinuous
resend_headers	int		Reemit PAT/PMT before writing the next packet
mpegts_copyts			Preserve original timestamps, if value is set to 1. Default value is -1, which results in shifting timestamps so that they start from 0
tables_version	int	0	Set PAT, PMT, SDT and NIT version (default 0, valid values are from 0 to 31, inclusively). This option allows updating stream structure so that standard consumer may detect the change
omit_video_pes_length			Omit the PES packet length for video packets
pcr_period	int	20	Override the default PCR retransmission time in milliseconds. Default is -1 which means that the PCR interval will be determined automatically: 20 ms is used for CBR streams, the highest multiple of the frame duration which is less than 100 ms is used for VBR streams
pat_period	double		PAT/PMT retransmission time limit in seconds
sdt_period	double		SDT retransmission time limit in seconds

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

MPEG-DASH Streaming (Adaptive HTTP)

Configuration Parameter: dash

Extensions: mpd

Additional attributes

Name	Type	Default	Description
adaptation_sets	string		Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on
window_size	int	0	Number of segments kept in the manifest
extra_window_size	int	5	Number of segments kept outside of the manifest before removing from disk
min_seg_duration	int	5000000	Minimum segment duration (in microseconds) (will be deprecated)
seg_duration			Segment duration (in seconds, fractional value can be set)
frag_duration			Fragment duration (in seconds, fractional value can be set)
frag_type	option	none	Set type of interval for fragments One fragment per segmentFragment at every frameFragment at specific time intervalsFragment at keyframes and following P-Frame reordering (Video only, experimental)
remove_at_exit	bool	false	Enable or disable removal of all segments when finished. This is disabled by default
use_template	bool	true	Enable or disable use of SegmentTemplate instead of SegmentList in the manifest. This is enabled by default
use_timeline	bool	true	Enable or disable use of SegmentTimeline within the SegmentTemplate manifest section. This is enabled by default
single_file	bool	false	Enable or disable storing all segments in one file, accessed using byte ranges. The name of the single file can be specified with the single_file_name option, if not specified assume the basename of the manifest file with the output format extension. This is disabled by default.
single_file_name	string		DASH-templated name to use for the manifest baseURL element. Imply that the single_file option is set to true. In the template, $ext$ is replaced with the file name extension specific for the segment format
init_seg_name	string	init-stream$RepresentationID$.$ext$	DASH-templated name to use for the initialization segment. Default is init-stream$RepresentationID$.$ext$. $ext$ is replaced with the file name extension specific for the segment format
media_seg_name	string	chunk-stream$RepresentationID$-$Number%05d$.$ext$	DASH-templated name to use for the media segments. Default is chunk-stream$RepresentationID$-$Number%05d$.$ext$. $ext$ is replaced with the file name extension specific for the segment format
utc_timing_url	string		URL of the page that will return the UTC timestamp in ISO format, for example https://time.akamai.com/?iso
method	string		Use the given HTTP method to create output files. Generally set to PUT or POST
http_user_agent	string		Override User-Agent field in HTTP header. Applicable only for HTTP output
http_persistent			Use persistent HTTP connections. Applicable only for HTTP output
hls_playlist			Generate HLS playlist files. The master playlist is generated with filename specified by the hls_master_name option. One media playlist file is generated for each stream with filenames media_0.m3u8, media_1.m3u8, etc
streaming	bool	false	Enable or disable chunk streaming mode of output. In chunk streaming mode, each frame will be a moof fragment which forms a chunk. This is disabled by default
timeout			Set timeout for socket I/O operations expressed in seconds (fractional value can be set). Applicable only for HTTP output
index_correction	bool	false	Enable or disable segment index correction logic. Applicable only when use_template is enabled and use_timeline is disabled. This is disabled by default. When enabled, the logic monitors the flow of segment indexes. If a streamsâ€™s segment index value is not at the expected real time position, then the logic corrects that index value. Typically this logic is needed in live streaming use cases. The network bandwidth fluctuations are common during long run streaming. Each fluctuation can cause the segment indexes fall behind the expected real time position
format_options			Set container format (mp4/webm) options using a :-separated list of key=value parameters. Values containing : special characters must be escaped
global_sidx			Write global SIDX atom. Applicable only for single file, mp4 output, non-streaming mode
dash_segment_type	option	auto	Set dash segment files type
segment_type			Select segment file format based on codecMake segment file in ISOBMFF formatMake segment file in WebM format
ignore_io_errors	bool	false	Ignore IO errors during open and write. Useful for long-duration runs with network output. This is disabled by default
lhls			Enable Low-latency HLS(Experimental). Adds #EXT-X-PREFETCH tag with current segment's URI. This is an experimental feature
ldash	bool	false	Enable Low-latency Dash by constraining the presence and values of some elements. This is disabled by default
master_m3u8_publish_rate	int	0	Publish master playlist repeatedly every after specified number of segment intervals
write_prft			Write Producer Reference Time elements on supported streams. This also enables writing prft boxes in the underlying muxer. Applicable only when the utc_url option is enabled. It is set to auto by default, in which case the muxer will attempt to enable it only in modes that require it
mpd_profile	flags	+dash	Set profiles. Elements and values used in the manifest may be constrained by them MPEG-DASH ISO Base media file format live profileDVB-DASH profile
http_opts			Specify a list of :-separated key=value options to pass to the underlying HTTP protocol. Applicable only for HTTP output
target_latency			Set an intended target latency in seconds for serving (fractional value can be set). Applicable only when the streaming and write_prft options are enabled. This is an informative fields clients can use to measure the latency of the service
min_playback_rate	double	1/1	Set the minimum playback rate indicated as appropriate for the purposes of automatically adjusting playback latency and buffer occupancy during normal playback by clients
max_playback_rate	double	1/1	Set the maximum playback rate indicated as appropriate for the purposes of automatically adjusting playback latency and buffer occupancy during normal playback by clients

Video codecs

Default format codec
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
MP3 (LAME, MPEG Audio Layer 3)

MXF (Material eXchange Format)

Configuration Parameter: mxf

Extensions: mxf

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false

Video codecs

DV / DVCPRO HD (SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
MPEG-2 Video (SW)
VC3/DNxHD 720
VC3/DNxHD 1080
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

PCM 16-bit Signed LE
PCM 24-bit Signed LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

MXF D-10 (IMX D-10 Mapping)

Configuration Parameter: mxf_d10

Extensions: mxf

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false

Video codecs

MPEG-2 Video 30Mbps
MPEG-2 Video 40Mbps
MPEG-2 Video 50Mbps
Direct stream copy

Audio codecs

PCM 16-bit Signed LE
PCM 24-bit Signed LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

Ogg Vorbis

Configuration Parameter: ogg

Extensions: ogg

Video codecs

No Video (Disabled)

Audio codecs

Ogg Vorbis

RIST Streaming (Reliable Internet Stream Transport)

Configuration Parameter: mpegts

Extensions: rist://

Additional attributes

Name	Type	Default	Description
rist_profile	flags	main	simple profilemain profileadvanced profile
buffer_size	int		Set internal RIST buffer size in milliseconds for retransmission of data. Default value is 0 which means the librist default (1 sec). Maximum value is 30000 milliseconds
fifo_size	int	8192	Set fifo buffer size, must be a power of 2
overrun_nonfatal	bool	false	Survive in case of receiving fifo buffer overrun
pkt_size	int	1316	Set maximum packet size for sending data
log_level	int		Set loglevel for RIST logging messages. You only need to set this if you explicitly want to enable debug level messages or packet loss simulation, otherwise the regular loglevel is respected
secret	string		Set override of encryption secret, by default is unset
encryption	string		Set encryption type, by default is disabled. Acceptable values are 128 and 256
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
embed_tc	bool	false	Enable embedding Time Code into elementary video stream (for H.264 video only)
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into MPEG transport stream
mpegts_transport_stream_id	int	1	Set the transport_stream_id. This identifies a transponder in DVB. Default is 0x0001
mpegts_original_network_id	int	65281	Set the original_network_id. This is unique identifier of a network in DVB. Its main use is in the unique identification of a service through the path Original_Network_ID, Transport_Stream_ID
mpegts_service_id	int	1	Set the service_id, also known as program in DVB. Default is 0x0001
mpegts_service_type	option	digital_tv	Set service_type field Digital TelevisionDigital RadioTeletextAdvanced Codec Digital RadioMPEG2 Digital HDTVAdvanced Codec Digital SDTVAdvanced Codec Digital HDTVHEVC Digital Television Service
mpegts_pmt_start_pid	int	4096	Set the first PID for PMTs. Default is 0x1000, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the PMT PID is fixed 0x0100
mpegts_start_pid	int	256	SSet the first PID for elementary streams. Default is 0x0100, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the elementary stream PIDs are fixed
mpegts_m2ts_mode			Enable m2ts mode
muxrate	int	1	Set a constant muxrate. Default is VBR
pes_payload_size	int	2930	Minimum PES packet payload in bytes
mpegts_flags	flags		MPEG-TS muxing flags Reemit PAT/PMT before writing the next packetUse LATM packetization for AACReemit PAT and PMT at each video frameConform to System B (DVB) instead of System A (ATSC)Mark initial packets as discontinuous
resend_headers	int	0	Reemit PAT/PMT before writing the next packet
mpegts_copyts			Preserve original timestamps, if value is set to 1. Default value is -1, which results in shifting timestamps so that they start from 0
tables_version	int	0	Set PAT, PMT, SDT and NIT version (default 0, valid values are from 0 to 31, inclusively). This option allows updating stream structure so that standard consumer may detect the change
omit_video_pes_length	bool	true	Omit the PES packet length for video packets. Default value is true
pcr_period	int	20	Override the default PCR retransmission time in milliseconds. Default is -1 which means that the PCR interval will be determined automatically: 20 ms is used for CBR streams, the highest multiple of the frame duration which is less than 100 ms is used for VBR streams
pat_period	double		PAT/PMT retransmission time limit in seconds
sdt_period	double		Maximum time in seconds between SDT tables

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

RTMP Streaming (Flash / YouTube / Twitch)

Configuration Parameter: flv

Extensions: rtmp://

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
merge_tracks	option_fixed	true	Merge audio tracks
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
rtmp_app	string		Name of application to connect on the RTMP server. This option overrides the parameter specified in the URI
rtmp_buffer	string		Set the client buffer time in milliseconds. The default is 3000
rtmp_flashver	string		Version of the Flash plugin used to run the SWF player. The default is LNX 9,0,124,2. (When publishing, the default is FMLE/3.0 (compatible; 'libavformat version')
rtmp_live	string		Specify that the media is a live stream. No resuming or seeking in live streams is possible. The default value is any, which means the subscriber first tries to play the live stream specified in the playpath. If a live stream of that name is not found, it plays the recorded stream. The other possible values are live and recorded
rtmp_pageurl	string		URL of the web page in which the media was embedded. By default no value will be sent
rtmp_playpath	string		Stream identifier to play or to publish. This option overrides the parameter specified in the URI
rtmp_subscribe	string		Name of live stream to subscribe to. By default no value will be sent. It is only sent if the option is specified or if rtmp_live is set to live
vt_sync_msec	int	5000	Set the video time synchronization interval

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
AV1 (NVIDIA NVENC, HW)
FLV / Sorenson Spark (H.263, SW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
VP8 (Google, SW)
VP9 (Google, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

AAC (Advanced Audio Coding)
MP3 (LAME, MPEG Audio Layer 3)
PCM 16-bit Signed LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

RTP Streaming (Pro-MPEG FEC)

Configuration Parameter: rtp_mpegts

Extensions:

Additional attributes

Name	Type	Default	Description
l	int	8	The number of columns (4-20, LxD Lsss 100)
d	int	4	The number of rows (4-20, LxD Less 100)

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
No Audio (Disabled)

RTP Streaming (Realtime Transport Protocol)

Configuration Parameter: rtp

Extensions:

Additional attributes

Name	Type	Default	Description
sdp	string	C:\Config.sdp	Path to .sdp file. This file contains sdp information for an output stream to file. This allows dumping sdp information when at least one output isnâ€™t an rtp stream. (Requires at least one of the output formats to be rtp)
rtpflags	flags		Add RTP hinting tracks to the output file. The following flags can be used Use MP4A-LATM packetization instead of MPEG4-GENERIC for AACUse RFC 2190 packetization instead of RFC 4629 for H.263Don't send RTCP sender reportsUse mode 0 for H.264 in RTPSend RTCP BYE packets when finishing
payload_type	int	-1	Specify RTP payload type
ssrc	int	0	Stream identifier
cname	string		CNAME to include in RTCP SR packets
seq	int		Starting sequence number

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
No Video (Disabled)

Audio codecs

Default format codec
MP2 (MPEG Audio Layer 2)
No Audio (Disabled)

RTSP Streaming (ANNOUNCE, limited servers)

Configuration Parameter: rtsp

Extensions: rtsp://

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
rtpflags	flags		RTP muxer flags Use MP4A-LATM packetization instead of MPEG4-GENERIC for AACUse RFC 2190 packetization instead of RFC 4629 for H.263Don't send RTCP sender reportsUse mode 0 for H.264 in RTPSend RTCP BYE packets when finishing
rtsp_transport	flags		Set RTSP transport protocols Use UDP as lower transport protocolUse TCP (interleaving within the RTSP control channel) as lower transport protocolUse UDP multicast as lower transport protocolUse HTTP tunneling as lower transport protocol, which is useful for passing proxiesUse HTTPs tunneling as lower transport protocol, which is useful for passing proxies and widely used for security consideration
rtsp_flags			Set RTSP flags. Default value is none. The following values are accepted Accept packets only from negotiated peer address and portAct as a server, listening for an incoming connectionTry TCP for RTP transport first, if TCP is available as RTSP RTP transportExport raw MPEG-TS stream instead of demuxing. The flag will simply write out the raw stream, with the original PAT/PMT/PIDs intact
min_port	int	5000	Set minimum local UDP port. Default value is 5000
max_port	int	65000	Set maximum local UDP port. Default value is 65000
buffer_size	int	-1	Underlying protocol send/receive buffer size in bytes
stimeout	int	10000000	Set timeout (in microseconds) of socket TCP I/O operations

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (x265, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
No Audio (Disabled)

SRT Streaming (DVB-Compatible Mode)

Configuration Parameter: dvb

Extensions: srt://

Additional attributes

Name	Type	Default	Description
maxbw	int	-1	Maximum send bandwidth. -1: infinite (CSRTCC limit is 30mbps) = 0: relative to input rate
pbkeylen	option_fixed	0	Sender encryption key length, in bytes. Only can be set to 0, 16, 24 and 32. Enable sender encryption if not 0. Not required on receiver (set to 0), key size obtained from sender in HaiCrypt handshake. Default value is 0
passphrase	string		Sets the passphrase for encryption (must be at least 10 characters). This turns encryption on on this side (or turns it off, if empty passphrase is passed)
mss	int	1500	Maximum Segment Size. Used for buffer allocation and rate calculation using packet counter assuming fully filled packets. The smallest MSS between the peers is used. This is 1500 by default in the overall internet. This is the maximum size of the UDP packet and can be only decreased, unless you have some unusual dedicated network settings. Not to be mistaken with the size of the UDP payload or SRT payload â€” this size is the size of the IP packet, including the UDP and SRT headers
fc	int	25600	Flight Flag Size (maximum number of bytes that can be sent without being acknowledged)
sndbuf	int	12058624	Send Buffer Size. Warning: configured in bytes, converted in packets, when set, based on MSS value. For desired result, configure MSS first. Default value: 8192 Ã— (1500-28)
rcvbuf	int	12058624	Receive Buffer Size. Receive buffer must not be greater than FC size. Warning: configured in bytes, converted in packets when set based on MSS value. For desired result, configure MSS first. Default value: 8192 Ã— (1500-28)
ipttl	option_fixed	32	IPv4 Time To Live (see IP_TTL option for IP) or IPv6 unicast hops (see IPV6_UNICAST_HOPS for IPV6) depending on socket address family. Applies to sender only.
iptos	int	184	IPv4 Type of Service (see IP_TOS option for IP) or IPv6 Traffic Class (see IPV6_TCLASS of IPv6) depending on socket address family. Applies to sender only. Default: 0xB8
inputbw	int	0	Sender nominal input rate. Used along with OHEADBW, when MAXBW is set to relative (0), to calculate maximum sending rate when recovery packets are sent along with main media stream (INPUTBW Ã— (100 + OHEADBW) / 100). If INPUTBW is not set while MAXBW is set to relative (0), the actual input rate is evaluated inside the library.
oheadbw	int	25	Recovery bandwidth overhead above input rate (see SRTO_INPUTBW). Sender: user configurable, default: 25%
latency	int	0	This flag sets both SRTO_RCVLATENCY and SRTO_PEERLATENCY to the same value. Note that prior to version 1.3.0 this is the only flag to set the latency, however this is effectively equivalent to setting SRTO_PEERLATENCY, when the side is sender (see SRTO_SENDER) and SRTO_RCVLATENCY when the side is receiver, and the bidirectional stream sending in version 1.2.0is not supported
tsbpddelay			Receiver's buffer delay (or receiver's buffer latency, or SRT Latency). This is the time, in milliseconds, that SRT holds a packet from the moment it has been received till the time it should be delivered to the upstream application
tlpktdrop	bool	true	Too-late Packet Drop. When enabled on receiver, it skips missing packets that have not been delivered in time and delivers the subsequent packets to the application when their time-to-play has come. It also sends a fake ACK to the sender. When enabled on sender and enabled on the receiving peer, sender drops the older packets that have no chance to be delivered in time. It is automatically enabled in sender if receiver supports it
snddropdelay			The senderâ€™s extra delay before dropping packets. This delay is added to the default drop delay time interval value. Special value -1: Do not drop packets on the sender at all
nakreport	bool	true	When set to true, Receiver will send UMSG_LOSSREPORT messages periodically until the lost packet is retransmitted or intentionally dropped
conntimeo	int	3000	Connect timeout. SRT cannot connect for RTT > 1500 msec (2 handshake exchanges) with the default connect timeout of 3 seconds. This option applies to the caller and rendezvous connection modes. The connect timeout is 10 times the value set for the rendezvous mode (which can be used as a workaround for this connection problem with earlier versions)
lossmaxttl	int	0	The value up to which the Reorder Tolerance may grow. When Reorder Tolerance is > 0, then packet loss report is delayed until that number of packets come in. Reorder Tolerance increases every time a "belated" packet has come, but it wasn't due to retransmission (that is, when UDP packets tend to come out of order), with the difference between the latest sequence and this packet's sequence, and not more than the value of this option. By default it's 0, which means that this mechanism is turned off, and the loss report is always sent immediately upon experiencing a "gap" in sequences.
rcvlatency	int	0	The time that should elapse since the moment when the packet was sent and the moment when it's delivered to the receiver application in the receiving function. This time should be a buffer time large enough to cover the time spent for sending, unexpectedly extended RTT time, and the time needed to retransmit the lost UDP packet. The effective latency value will be the maximum of this options' value and the value of SRTO_PEERLATENCY set by the peer side
peerlatency	int	0	The latency value (as described in SRTO_RCVLATENCY) that is set by the sender side as a minimum value for the receiver
minversion	int	0	The minimum SRT version that is required from the peer. A connection to a peer that does not satisfy the minimum version requirement will be rejected
streamid	string		A string limited to 512 characters that can be set on the socket prior to connecting. This stream ID will be able to be retrieved by the listener side from the socket that is returned from srt_accept and was connected by a socket with that set stream ID. SRT does not enforce any special interpretation of the contents of this string. As this uses internally the std::string type, there are additional functions for it in the legacy/C++ API (udt.h): UDT::setstreamid and UDT::getstreamid. This option doesnâ€™t make sense in Rendezvous connection; the result might be that simply one side will override the value from the other side and itâ€™s the matter of luck which one would win
smoother	option_fixed	live	The type of Smoother used for the transmission for that socket, which is responsible for the transmission and congestion control. The Smoother type must be exactly the same on both connecting parties, otherwise the connection is rejected.
messageapi	bool	true	When set, this socket uses the Message API[*], otherwise it uses Buffer API. Note that in live mode (see SRTO_TRANSTYPE option) thereâ€™s only message API available.
payloadsize	int	1316	Sets the maximum declared size of a single call to sending function in Live mode. Use 0 if this value isn't used (which is default in file mode). This value shall not be exceeded for a single data sending instruction in Live mode/ Range: up to MTUsize-28-16, usually 1456
transtype			Sets the transmission type for the socket, in particular, setting this option sets multiple other parameters to their default values as required for a particular transmission type. Type: enum. Default: SRTT_LIVE. Range: SRTT_FILE
kmrefreshrate			The number of packets to be transmitted after which the encryption key is switched to a new key. Default is -1. -1 means auto (0x1000000 in srt library). The range for this option is integers in the 0 - INT_MAX
kmpreannounce			The interval between when a new encryption key is sent and when switchover occurs. This value also applies to the subsequent interval between when switchover occurs and when the old encryption key is decommissioned. Default is -1. -1 means auto (0x1000 in srt library). The range for this option is integers in the 0 - INT_MAX
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into MPEG transport stream
service_name	string	MService001	Set Service Name
service_provider	string	Medialooks	Set Service Provider
transport_stream_id	int	1	Set transport_stream_id field
original_network_id	int	1	Set original_network_id field
muxrate	int	1	The combined rate of all video and audio elementary stream packets common to one program. This rate also includes the VBI and sub-picture private stream data, which MPEG treats as a private stream type
service_id	int	1	Set service_id field
service_type	option_fixed	digital_tv	Service type
pmt_start_pid	int	192	Set the first pid of the PMT
start_pid	int	1024	Set the first pid
pes_payload_size	int	2930	Set minimum PES packet payload in bytes. Default is 2930
mpegts_flags	flags	+system_b	MPEG-TS muxing flags Reemit PAT/PMT before writing the next packetReemit PAT and PMT at each video frameUse LATM packetization for AACConform to System B (DVB) instead of System A (ATSC)
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
resend_headers	int	0	Reemit PAT/PMT before writing the next packet
tables_version	int	0	Set PAT, PMT, SDT and NIT version (default 0, valid values are from 0 to 31, inclusively). This option allows updating stream structure so that standard consumer may detect the change
rc_buffers	int	8	Rate-Control buffers
rc_sync_msec	int	1	Rate-Control precision (in msec, miminum 1 msec)
rc_max_underflow_msec	int	30	Rate-Control max underflow time, after this time the clock corrected (in msec)
pcr_period	int	20	Override the default PCR retransmission time in milliseconds (default 20ms)
pat_period	double	0.1	PAT/PMT retransmission time limit in seconds (default 100 msec)
sdt_period	double	0.5	SDT retransmission time limit in seconds (default 500 msec)
flush_packets	int	-1	Enable flushing of the I/O context after each packet
max_delay	int	700000	Set maximum multiplexing PTS/PCR delay in microseconds

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

SRT Streaming (Secure Reliable Transport)

Configuration Parameter: mpegts

Extensions: srt://

Additional attributes

Name	Type	Default	Description
maxbw	int	-1	Maximum send bandwidth. -1: infinite (CSRTCC limit is 30mbps) = 0: relative to input rate
pbkeylen	option_fixed	0	Sender encryption key length, in bytes. Only can be set to 0, 16, 24 and 32. Enable sender encryption if not 0. Not required on receiver (set to 0), key size obtained from sender in HaiCrypt handshake. Default value is 0
passphrase	string		Sets the passphrase for encryption (must be at least 10 characters). This turns encryption on on this side (or turns it off, if empty passphrase is passed).
mss	int	1500	Maximum Segment Size. Used for buffer allocation and rate calculation using packet counter assuming fully filled packets. The smallest MSS between the peers is used. This is 1500 by default in the overall internet. This is the maximum size of the UDP packet and can be only decreased, unless you have some unusual dedicated network settings. Not to be mistaken with the size of the UDP payload or SRT payload â€” this size is the size of the IP packet, including the UDP and SRT headers
fc	int	25600	Flight Flag Size (maximum number of bytes that can be sent without being acknowledged)
sndbuf	int	12058624	Send Buffer Size. Warning: configured in bytes, converted in packets, when set, based on MSS value. For desired result, configure MSS first. Default value: 8192 Ã— (1500-28)
rcvbuf	int	12058624	Receive Buffer Size. Receive buffer must not be greater than FC size. Warning: configured in bytes, converted in packets when set based on MSS value. For desired result, configure MSS first. Default value: 8192 Ã— (1500-28)
ipttl	option_fixed	32	IPv4 Time To Live (see IP_TTL option for IP) or IPv6 unicast hops (see IPV6_UNICAST_HOPS for IPV6) depending on socket address family. Applies to sender only
iptos	int	184	IPv4 Type of Service (see IP_TOS option for IP) or IPv6 Traffic Class (see IPV6_TCLASS of IPv6) depending on socket address family. Applies to sender only. Default: 0xB8
inputbw	int	0	Sender nominal input rate. Used along with OHEADBW, when MAXBW is set to relative (0), to calculate maximum sending rate when recovery packets are sent along with main media stream (INPUTBW Ã— (100 + OHEADBW) / 100). If INPUTBW is not set while MAXBW is set to relative (0), the actual input rate is evaluated inside the library
oheadbw	int	25	Recovery bandwidth overhead above input rate (see SRTO_INPUTBW). Sender: user configurable, default: 25%
latency	int	0	This flag sets both SRTO_RCVLATENCY and SRTO_PEERLATENCY to the same value. Note that prior to version 1.3.0 this is the only flag to set the latency, however this is effectively equivalent to setting SRTO_PEERLATENCY, when the side is sender (see SRTO_SENDER) and SRTO_RCVLATENCY when the side is receiver, and the bidirectional stream sending in version 1.2.0is not supported
tsbpddelay			Receiver's buffer delay (or receiver's buffer latency, or SRT Latency). This is the time, in milliseconds, that SRT holds a packet from the moment it has been received till the time it should be delivered to the upstream application
tlpktdrop	bool	true	Too-late Packet Drop. When enabled on receiver, it skips missing packets that have not been delivered in time and delivers the subsequent packets to the application when their time-to-play has come. It also sends a fake ACK to the sender. When enabled on sender and enabled on the receiving peer, sender drops the older packets that have no chance to be delivered in time. It is automatically enabled in sender if receiver supports it
snddropdelay			The senderâ€™s extra delay before dropping packets. This delay is added to the default drop delay time interval value
nakreport	bool	true	When set to true, Receiver will send UMSG_LOSSREPORT messages periodically until the lost packet is retransmitted or intentionally dropped
conntimeo	int	3000	Connect timeout. SRT cannot connect for RTT > 1500 msec (2 handshake exchanges) with the default connect timeout of 3 seconds. This option applies to the caller and rendezvous connection modes. The connect timeout is 10 times the value set for the rendezvous mode (which can be used as a workaround for this connection problem with earlier versions)
lossmaxttl	int	0	The value up to which the Reorder Tolerance may grow. When Reorder Tolerance is > 0, then packet loss report is delayed until that number of packets come in. Reorder Tolerance increases every time a "belated" packet has come, but it wasn't due to retransmission (that is, when UDP packets tend to come out of order), with the difference between the latest sequence and this packet's sequence, and not more than the value of this option. By default it's 0, which means that this mechanism is turned off, and the loss report is always sent immediately upon experiencing a "gap" in sequences
rcvlatency	int	0	The time that should elapse since the moment when the packet was sent and the moment when it's delivered to the receiver application in the receiving function. This time should be a buffer time large enough to cover the time spent for sending, unexpectedly extended RTT time, and the time needed to retransmit the lost UDP packet. The effective latency value will be the maximum of this options' value and the value of SRTO_PEERLATENCY set by the peer side
peerlatency	int	0	The latency value (as described in SRTO_RCVLATENCY) that is set by the sender side as a minimum value for the receiver
minversion	int	0	The minimum SRT version that is required from the peer. A connection to a peer that does not satisfy the minimum version requirement will be rejected
streamid	string		A string limited to 512 characters that can be set on the socket prior to connecting. This stream ID will be able to be retrieved by the listener side from the socket that is returned from srt_accept and was connected by a socket with that set stream ID. SRT does not enforce any special interpretation of the contents of this string. As this uses internally the std::string type, there are additional functions for it in the legacy/C++ API (udt.h): UDT::setstreamid and UDT::getstreamid. This option doesnâ€™t make sense in Rendezvous connection; the result might be that simply one side will override the value from the other side and itâ€™s the matter of luck which one would win
smoother	option_fixed	live	The type of Smoother used for the transmission for that socket, which is responsible for the transmission and congestion control. The Smoother type must be exactly the same on both connecting parties, otherwise the connection is rejected
messageapi	bool	true	When set, this socket uses the Message API[*], otherwise it uses Buffer API. Note that in live mode (see SRTO_TRANSTYPE option) thereâ€™s only message API available
payloadsize	int	1316	Sets the maximum declared size of a single call to sending function in Live mode. Use 0 if this value isn't used (which is default in file mode). This value shall not be exceeded for a single data sending instruction in Live mode/ Range: up to MTUsize-28-16, usually 1456
transtype			Sets the transmission type for the socket, in particular, setting this option sets multiple other parameters to their default values as required for a particular transmission type. Type: enum. Default: SRTT_LIVE. Range: SRTT_FILE
kmrefreshrate			The number of packets to be transmitted after which the encryption key is switched to a new key. Default is -1. -1 means auto (0x1000000 in srt library). The range for this option is integers in the 0 - INT_MAX
kmpreannounce			The interval between when a new encryption key is sent and when switchover occurs. This value also applies to the subsequent interval between when switchover occurs and when the old encryption key is decommissioned. Default is -1. -1 means auto (0x1000 in srt library). The range for this option is integers in the 0 - INT_MAX
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
embed_tc	bool	false	Enable embedding Time Code into elementary video stream (for H.264 video only)
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into MPEG transport stream
mpegts_transport_stream_id	int	1	Set the transport_stream_id. This identifies a transponder in DVB. Default is 0x0001
mpegts_original_network_id	int	65281	Set the original_network_id. This is unique identifier of a network in DVB. Its main use is in the unique identification of a service through the path Original_Network_ID, Transport_Stream_ID
mpegts_service_id	int	1	Set the service_id, also known as program in DVB. Default is 0x0001
mpegts_service_type	option	digital_tv	Set service_type field. Digital TelevisionDigital RadioTeletextAdvanced Codec Digital RadioMPEG2 Digital HDTVAdvanced Codec Digital SDTVAdvanced Codec Digital HDTVHEVC Digital Television Service
mpegts_pmt_start_pid	int	4096	Set the first PID for PMTs. Default is 0x1000, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the PMT PID is fixed 0x0100
mpegts_start_pid	int	256	Set the first PID for elementary streams. Default is 0x0100, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the elementary stream PIDs are fixed
mpegts_m2ts_mode			Enable m2ts mode if set to 1. Default value is -1 which disables m2ts mode
muxrate	int	1	Set a constant muxrate. Default is VBR
pes_payload_size	int	2930	Set minimum PES packet payload in bytes. Default is 2930
mpegts_flags	flags		MPEG-TS muxing flags Reemit PAT/PMT before writing the next packetUse LATM packetization for AACReemit PAT and PMT at each video frameConform to System B (DVB) instead of System A (ATSC)Mark initial packets as discontinuous
resend_headers	int	0	Reemit PAT/PMT before writing the next packet
mpegts_copyts			Preserve original timestamps, if value is set to 1. Default value is -1, which results in shifting timestamps so that they start from 0
tables_version	int	0	Set PAT, PMT, SDT and NIT version (default 0, valid values are from 0 to 31, inclusively). This option allows updating stream structure so that standard consumer may detect the change
omit_video_pes_length			Omit the PES packet length for video packets
pcr_period	int	20	Override the default PCR retransmission time in milliseconds. Default is -1 which means that the PCR interval will be determined automatically: 20 ms is used for CBR streams, the highest multiple of the frame duration which is less than 100 ms is used for VBR streams
pat_period	double		PAT/PMT retransmission time limit in seconds
sdt_period	double		Maximum time in seconds between SDT tables

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

UDP Streaming (MPEG-TS)

Configuration Parameter: mpegts

Extensions: udp://

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
embed_tc	bool	false	Enable embedding Time Code into elementary video stream (for H.264 video only)
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
embed_scte35	bool	false	Enable embedding SCTE-35 triggers into MPEG transport stream
mpegts_transport_stream_id	int	1	Set the transport_stream_id. This identifies a transponder in DVB. Default is 0x0001
mpegts_original_network_id	int	65281	Set the original_network_id. This is unique identifier of a network in DVB. Its main use is in the unique identification of a service through the path Original_Network_ID, Transport_Stream_ID
mpegts_service_id	int	1	Set the service_id, also known as program in DVB. Default is 0x0001
mpegts_service_type	option	digital_tv	Set service_type field. Digital TelevisionDigital RadioTeletextAdvanced Codec Digital RadioMPEG2 Digital HDTVAdvanced Codec Digital SDTVAdvanced Codec Digital HDTVHEVC Digital Television Service
mpegts_pmt_start_pid	int	4096	Set the first PID for PMTs. Default is 0x1000, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the PMT PID is fixed 0x0100
mpegts_start_pid	int	256	Set the first PID for elementary streams. Default is 0x0100, minimum is 0x0020, maximum is 0x1ffa. This option has no effect in m2ts mode where the elementary stream PIDs are fixed
mpegts_m2ts_mode			Enable m2ts mode if set to 1. Default value is -1 which disables m2ts mode
muxrate	int	1	Set a constant muxrate. Default is VBR
pes_payload_size	int	2930	Set minimum PES packet payload in bytes. Default is 2930
mpegts_flags	flags		MPEG-TS muxing flags Reemit PAT/PMT before writing the next packetUse LATM packetization for AACReemit PAT and PMT at each video frameConform to System B (DVB) instead of System A (ATSC)Mark initial packets as discontinuous
resend_headers	int	0	Reemit PAT/PMT before writing the next packet
mpegts_copyts			Preserve original timestamps, if value is set to 1. Default value is -1, which results in shifting timestamps so that they start from 0
tables_version	int	0	Set PAT, PMT, SDT and NIT version (default 0, valid values are from 0 to 31, inclusively). This option allows updating stream structure so that standard consumer may detect the change
omit_video_pes_length			Omit the PES packet length for video packets
pcr_period	int	20	Override the default PCR retransmission time in milliseconds. Default is -1 which means that the PCR interval will be determined automatically: 20 ms is used for CBR streams, the highest multiple of the frame duration which is less than 100 ms is used for VBR streams
pat_period	double		PAT/PMT retransmission time limit in seconds
sdt_period	double		SDT retransmission time limit in seconds
flush_packets	int	-1	Enable flushing of the I/O context after each packet

Video codecs

Default format codec
AV1 (FFmpeg VPL-MSDK, HW)
H.264 AVC (AMD AMF, HW)
H.264 AVC (Cisco OpenH264, SW)
H.264 AVC (FFmpeg VPL-MSDK, HW)
H.264 AVC (Intel QuickSync, SW)
H.264 AVC (Intel QuickSync, HW)
H.264 AVC (libx264, SW)
H.264 AVC (NVIDIA NVENC, HW)
H.264 AVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (AMD AMF, HW)
H.265 HEVC (FFmpeg VPL-MSDK, HW)
H.265 HEVC (Intel QuickSync, HW)
H.265 HEVC (NVIDIA NVENC, HW)
H.265 HEVC (NVIDIA NVENC Lossless, HW)
H.265 HEVC (x265, SW)
H.266 VVC (Fraunhofer VVenC, SW)
MJPEG (Motion JPEG, SW)
MPEG-2 Video (SW)
MPEG-4 Part 2 Video (ASP, SW)
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

Default format codec
AAC (Advanced Audio Coding)
AC-3 (Dolby Digital, Floating-Point)
AC-3 (Dolby Digital, Fixed-Point)
MP2 (MPEG Audio Layer 2)
MP3 (LAME, MPEG Audio Layer 3)
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

WAV (Wave Audio File)

Configuration Parameter: wav

Extensions: wav

Video codecs

No Video (Disabled)

Audio codecs

PCM 16-bit Signed LE
PCM 24-bit Signed LE
PCM 24-bit D-Cinema
PCM 32-bit Signed LE
PCM 32-bit Float LE

WebM (Web Media Container)

Configuration Parameter: webm

Extensions: webm

Additional attributes

Name	Type	Default	Description
reserve_index_space	int	0	Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues)
cluster_size_limit	int	-1	Store at most the provided amount of bytes in a cluster. If not specified, the limit is set automatically to a sensible hardcoded fixed value
cluster_time_limit	int	-1	Store at most the provided number of milliseconds in a cluster. If not specified, the limit is set automatically to a sensible hardcoded fixed value
dash			Create a WebM file conforming to WebM DASH specification. By default it is set to false
dash_track_number	int	1	Track number for the DASH stream. By default it is set to 1
live			Write files assuming it is a live stream. By default it is set to false
allow_raw_vfw			Allow raw VFW mode. By default it is set to false
write_crc32			Write a CRC32 element inside every Level 1 element. By default it is set to true. This option is ignored for WebM

Video codecs

AV1 (NVIDIA NVENC, HW)
VP8 (Google, SW)
VP9 (Google, SW)

Audio codecs

Ogg Vorbis
No Audio (Disabled)

XDCAM MPEG IMX (MPEG-4 Container)

Configuration Parameter: mov

Extensions: mov

Additional attributes

Name	Type	Default	Description
split_channels	option_fixed	0	Split the overall audio channel into individual audio tracks, where each track contains a specific number of channels specified by the split_channels property. For example, if you record an input source with 12 audio channels and split_channels='4', you will get 3 audio tracks, each containing 4 audio channels
scc_capture	option_fixed	true	Capture SCC Closed Captioning
anc_capture	option_fixed	false	Capture ANC Closed Captioning
embed_cc	bool	false	Enable embedding Closed Captions (ATSC) into elementary video stream
raw_video	string		Capture RAW video. Set target save path as a value
raw_audio	string		Capture RAW audio. Set target save path as a value
start_timecode	option	auto	Set start timecode for encoding. Possible values are: auto (default), disabled, local_time or a custom string like "10:00:00:00"
ignore_pts	string		Ignore video sample times. Possible values: true, false
movflags	flags		MOV muxer flags Fragment at video keyframesThis data is usually written at the end of the file, but it can be moved to the start for better playback by adding +faststart to the movflags
moov_size	int	0	Reserves space for the moov atom at the beginning of the file instead of placing the moov atom at the end. If the space reserved is insufficient, muxing will fail
skip_iods	int	1	Skip writing iods atom
iods_audio_profile	int	-1	Specify iods number for the audio profile atom (from -1 to 255), default is -1
iods_video_profile	int	-1	Specify iods number for the video profile atom (from -1 to 255), default is -1
frag_duration	int	0	Create fragments that are duration microseconds long
min_frag_duration	int	0	Do not create fragments that are shorter than duration microseconds long
frag_size	int	0	Create fragments that contain up to size bytes of payload data

Video codecs

MPEG-2 Video 30Mbps
MPEG-2 Video 40Mbps
MPEG-2 Video 50Mbps
Direct Stream Copy (No Re-Encoding)
No Video (Disabled)

Audio codecs

PCM 16-bit Signed LE
PCM 24-bit Signed LE
Direct Stream Copy (No Re-Encoding)
No Audio (Disabled)

Articles in this section

AAC (Audio File, ADTS)

Video codecs

Audio codecs

AC-3 (Audio File)

Video codecs

Audio codecs

ASF (Advanced Streaming Format)

Video codecs

Audio codecs

AVI (Audio Video Interleaved)

Video codecs

Audio codecs

DV (Digital Video)

Video codecs

Audio codecs

DVB-Compatible Streaming (MPEG-TS DVB)

Video codecs

Audio codecs

DVD Video (VOB Files)

Video codecs

Audio codecs

FLV (Flash Video)

Video codecs

Audio codecs

GXF (General eXchange Format)

Video codecs

Audio codecs

HLS Streaming (Apple HTTP Live Streaming)

Video codecs

Audio codecs

Icecast Streaming (Ogg / MP3)

Video codecs

Audio codecs

IIS Live Smooth Streaming

Video codecs

Audio codecs

Image Sequence (Still Frames)

Video codecs

Audio codecs

MKV (Matroska)

Video codecs

Audio codecs

MOV (QuickTime File Format)

Video codecs

Audio codecs

MOV DNxHD (QuickTime with DNxHD)

Video codecs

Audio codecs

MP3 (LAME, MPEG Audio Layer 3)

Video codecs

Audio codecs

MP4 (MPEG-4 Part 14)

Video codecs

Audio codecs

MPEG Program Stream (PS)

Video codecs

Audio codecs

MPEG Transport Stream (TS File)

Video codecs

Audio codecs

MPEG-DASH Streaming (Adaptive HTTP)

Video codecs

Audio codecs

MXF (Material eXchange Format)

Video codecs

Audio codecs

MXF D-10 (IMX D-10 Mapping)

Video codecs

Audio codecs

Ogg Vorbis

Video codecs

Audio codecs

RIST Streaming (Reliable Internet Stream Transport)

Video codecs

Audio codecs

RTMP Streaming (Flash / YouTube / Twitch)

Video codecs

Audio codecs

RTP Streaming (Pro-MPEG FEC)