There are several options for H.265 encoding in MFormats SDK and MPlatform SDK - both CPU-based and GPU-powered.
If your hardware supports one of the options it is listed among available video codecs supported by the specified container.
NVIDIA NVEnc H.265 (HEVC) Encoder
Configuration Parameter: n265
Additional attributes
| Name | Type | Default | Description |
|---|---|---|---|
| b | int | 5M | The average bit rate in bps is the target bit rate used for rate control |
| g | int | 15 | This is the IDR period |
| bf | int | 1 | This sets the distance of one P picture from the previous P picture. e.g. for IBBPBBP, set the value as 3 |
| rc_type | option_fixed | Auto | The rate control type |
| preset | option_fixed | Auto | Codec Preset - if specified, some properties below ignored |
| level | option_fixed | Auto | Specifies the level of the encoded bitstream. |
| tier | option_fixed | Main | |
| maxrate | int | 0 | The maximum bit rate in bps is the peak bit rate used for VBR rate control |
| size | string | Resolution of video. Format: WIDTHxHEIGHT. | |
| ar | option | The aspect ratio of the video. | |
| ar_type | option_fixed | Type of video's aspect ratio. | |
| bufsize | int | 0 | Specifies the VBV(HRD) buffer size. in bits. Set 0 to use the default VBV buffer size |
| initialdelay | int | 0 | Specifies the VBV(HRD) initial delay in bits. Set 0 to use the default VBV initial delay |
| enableAQ | option_fixed | true | Set this to TRUE to enable adaptive quantization |
| intraRefreshPeriod | int | 0 | Specifies the interval between successive intra refresh if intraRefreshCount is set |
| intraRefreshCount | int | 0 | Specifies the length of intra refresh in a number of frames for periodic intra refresh. This value should be smaller than intraRefreshPeriod |
| mvprecision | option_fixed | Auto | Specifies the desired motion vector prediction precision |
| disable_sps_pps | option_fixed | false | Disable writing of Sequence and Picture parameter for every IDR frame |
| deblock | option_fixed | true | Set 'true' to enable in-loop filtering across slice boundary. |
| useConstrainedIntraPred | option_fixed | Set 'true' to enable constrained intra prediction. | |
| outputBufferingPeriodSEI | option_fixed | true | Set 'true' to write SEI buffering period syntax in the bitstream |
| outputPictureTimingSEI | option_fixed | true | Set 'true' to write SEI picture timing syntax in the bitstream |
| outputAUD | option_fixed | true | Set 'true' to write Access Unit Delimiter syntax. |
| enableLTR | option_fixed | Set 'true' to enable the use of long term reference pictures for inter prediction. | |
| maxNumRefFramesInDPB | int | Specifies the maximum number of reference frames in the DPB. | |
| ltrNumFrames | int | Specifies the maximum number of long term references can be used for prediction | |
| maxTemporalLayersMinus1 | int | Specifies the max temporal layer used for hierarchical coding. | |
| output.10bit | option_fixed | false | Specifies the 10-bit encoding mode |
| output.444 | option_fixed | false | Enable or disable 444 encoding |
Intel QuickSync HEVC Encoder
Configuration Parameter: q265hw
Additional attributes
| Name | Type | Default | Description |
|---|---|---|---|
| async_depth | int | 4 | Maximum processing parallelism |
| avbr_accuracy | int | 0 | Accuracy of the AVBR rate control |
| avbr_convergence | int | 0 | A convergence of the AVBR rate control |
| preset | option | medium | |
| vcm | int | 0 | Use the video conferencing mode rate control |
| rdo | int | -1 | Enable rate-distortion optimization |
| max_frame_size | int | -1 | Maximum encoded frame size in bytes |
| max_slice_size | int | -1 | Maximum encoded slice size in bytes |
| bitrate_limit | int | -1 | Toggle bitrate limitations |
| mbbrc | int | -1 | MB level bitrate control |
| extbrc | int | -1 | Extended bitrate control |
| adaptive_i | int | -1 | Adaptive I-frame placement |
| adaptive_b | int | -1 | Adaptive B-frame placement |
| b_strategy | int | -1 | Strategy to choose between I/P/B-frames |
| idr_interval | option | Distance (in I-frames) between IDR frames
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| load_plugin | option | hevc_hw | A user plugin to load in an internal session |
| load_plugins | string | A separate list of hexadecimal plugin UIDs to load in an internal session | |
| profile | option | unknown |
AMD AMF H.265 (HEVC) Encoder
Configuration Parameter: hevc_amf
Additional attributes
| Name | Type | Default | Description |
|---|---|---|---|
| b | int | 5M | The average bit rate in bps is the target bit rate used for VBR rate control |
| g | int | 15 | Group of picture (GOP) size |
| maxrate | int | 0 | Set max bitrate tolerance (in bits/s). Requires bufsize to be set |
| minrate | int | 0 | Set min bitrate tolerance (in bits/s). Most useful in setting up a CBR encode. |
| bufsize | int | 0 | Set rate control buffer size (in bits). It depends on the profile level of the video being encoded. Set only if you're encoding for a hardware device. |
| bf | int | 1 | This sets the distance of one P picture from the previous P picture. e.g. for IBBPBBP, set the value as 3 |
| usage | option_fixed | transcoding | Encoder Usage |
| profile | option_fixed | main | Profile |
| profile_tier | option_fixed | main | Profile tier |
| level | option_fixed | auto | Profile Level |
| quality | option_fixed | balanced | Quality Preference |
| rc | option_fixed | cqp | Rate Control Method |
| header_insertion_mode | option_fixed | none | Header insertion mode |
| gops_per_idr | int | 60 | GOPs per IDR 0-no IDR will be inserted |
| preanalysis | bool | false | Pre-Analysis Mode |
| vbaq | bool | false | Enable VBAQ |
| enforce_hrd | bool | false | Enforce HRD |
| filler_data | bool | false | Filler Data Enable |
| max_au_size | int | 0 | Maximum Access Unit Size for rate control (in bits) |
| min_qp_i | int | -1 | Min quantization parameter for I-frame |
| max_qp_i | int | -1 | Max quantization parameter for I-frame |
| min_qp_p | int | -1 | Min quantization parameter for P-frame |
| max_qp_p | int | -1 | Max quantization parameter for P-frame |
| qp_p | int | -1 | Quantization parameter for P-frame |
| qp_i | int | -1 | Quantization parameter for I-frame |
| skip_frame | bool | false | Rate Control Based Frame Skip |
| me_half_pel | bool | true | Enable ME Half Pixel |
| me_quarter_pel | bool | true | Enable ME Quarter Pixel |
| aud | bool | false | Inserts AU Delimiter NAL unit |
x265 H.265/HEVC
Available only with the GPL build of FFmpeg so you should license the codec before using it.
Configuration Parameter: libx265
Additional attributes
| Name | Type | Default | Description |
|---|---|---|---|
| preset | option | superfast | Set the x265 preset. |
| tune | option |
Set the x265 tune parameter.
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| forced-idr | int | 0 | Normally, when forcing an I-frame type, the encoder can select any type of I-frame. This option forces it to choose an IDR-frame. |
| x265-params | string | Set x265 options using a list of key=value couples separated by ":". See x265 -help for a list of options. |