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ffmpeg -h encoder=h264_nvenc
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| Encoder h264_nvenc [NVIDIA NVENC H.264 encoder]: | |
| General capabilities: dr1 delay hardware | |
| Threading capabilities: none | |
| Supported hardware devices: cuda cuda d3d11va d3d11va | |
| Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 bgra rgb0 rgba x2rgb10le x2bgr10le gbrp gbrp16le cuda d3d11 | |
| h264_nvenc AVOptions: | |
| -preset <int> E..V....... Set the encoding preset (from 0 to 18) (default p4) | |
| default 0 E..V....... | |
| slow 1 E..V....... hq 2 passes | |
| medium 2 E..V....... hq 1 pass | |
| fast 3 E..V....... hp 1 pass | |
| hp 4 E..V....... | |
| hq 5 E..V....... | |
| bd 6 E..V....... | |
| ll 7 E..V....... low latency | |
| llhq 8 E..V....... low latency hq | |
| llhp 9 E..V....... low latency hp | |
| lossless 10 E..V....... | |
| losslesshp 11 E..V....... | |
| p1 12 E..V....... fastest (lowest quality) | |
| p2 13 E..V....... faster (lower quality) | |
| p3 14 E..V....... fast (low quality) | |
| p4 15 E..V....... medium (default) | |
| p5 16 E..V....... slow (good quality) | |
| p6 17 E..V....... slower (better quality) | |
| p7 18 E..V....... slowest (best quality) | |
| -tune <int> E..V....... Set the encoding tuning info (from 1 to 4) (default hq) | |
| hq 1 E..V....... High quality | |
| ll 2 E..V....... Low latency | |
| ull 3 E..V....... Ultra low latency | |
| lossless 4 E..V....... Lossless | |
| -profile <int> E..V....... Set the encoding profile (from 0 to 3) (default main) | |
| baseline 0 E..V....... | |
| main 1 E..V....... | |
| high 2 E..V....... | |
| high444p 3 E..V....... | |
| -level <int> E..V....... Set the encoding level restriction (from 0 to 62) (default auto) | |
| auto 0 E..V....... | |
| 1 10 E..V....... | |
| 1.0 10 E..V....... | |
| 1b 9 E..V....... | |
| 1.0b 9 E..V....... | |
| 1.1 11 E..V....... | |
| 1.2 12 E..V....... | |
| 1.3 13 E..V....... | |
| 2 20 E..V....... | |
| 2.0 20 E..V....... | |
| 2.1 21 E..V....... | |
| 2.2 22 E..V....... | |
| 3 30 E..V....... | |
| 3.0 30 E..V....... | |
| 3.1 31 E..V....... | |
| 3.2 32 E..V....... | |
| 4 40 E..V....... | |
| 4.0 40 E..V....... | |
| 4.1 41 E..V....... | |
| 4.2 42 E..V....... | |
| 5 50 E..V....... | |
| 5.0 50 E..V....... | |
| 5.1 51 E..V....... | |
| 5.2 52 E..V....... | |
| 6.0 60 E..V....... | |
| 6.1 61 E..V....... | |
| 6.2 62 E..V....... | |
| -rc <int> E..V....... Override the preset rate-control (from -1 to INT_MAX) (default -1) | |
| constqp 0 E..V....... Constant QP mode | |
| vbr 1 E..V....... Variable bitrate mode | |
| cbr 2 E..V....... Constant bitrate mode | |
| vbr_minqp 8388609 E..V....... Variable bitrate mode with MinQP (deprecated) | |
| ll_2pass_quality 8388609 E..V....... Multi-pass optimized for image quality (deprecated) | |
| ll_2pass_size 8388610 E..V....... Multi-pass optimized for constant frame size (deprecated) | |
| vbr_2pass 8388609 E..V....... Multi-pass variable bitrate mode (deprecated) | |
| cbr_ld_hq 8388610 E..V....... Constant bitrate low delay high quality mode | |
| cbr_hq 8388610 E..V....... Constant bitrate high quality mode | |
| vbr_hq 8388609 E..V....... Variable bitrate high quality mode | |
| -rc-lookahead <int> E..V....... Number of frames to look ahead for rate-control (from 0 to INT_MAX) (default 0) | |
| -surfaces <int> E..V....... Number of concurrent surfaces (from 0 to 64) (default 0) | |
| -cbr <boolean> E..V....... Use cbr encoding mode (default false) | |
| -2pass <boolean> E..V....... Use 2pass encoding mode (default auto) | |
| -gpu <int> E..V....... Selects which NVENC capable GPU to use. First GPU is 0, second is 1, and so on. (from -2 to INT_MAX) (default any) | |
| any -1 E..V....... Pick the first device available | |
| list -2 E..V....... List the available devices | |
| -rgb_mode <int> E..V....... Configure how nvenc handles packed RGB input. (from 0 to INT_MAX) (default yuv420) | |
| yuv420 1 E..V....... Convert to yuv420 | |
| yuv444 2 E..V....... Convert to yuv444 | |
| disabled 0 E..V....... Disables support, throws an error. | |
| -delay <int> E..V....... Delay frame output by the given amount of frames (from 0 to INT_MAX) (default INT_MAX) | |
| -no-scenecut <boolean> E..V....... When lookahead is enabled, set this to 1 to disable adaptive I-frame insertion at scene cuts (default false) | |
| -forced-idr <boolean> E..V....... If forcing keyframes, force them as IDR frames. (default false) | |
| -b_adapt <boolean> E..V....... When lookahead is enabled, set this to 0 to disable adaptive B-frame decision (default true) | |
| -spatial-aq <boolean> E..V....... set to 1 to enable Spatial AQ (default false) | |
| -spatial_aq <boolean> E..V....... set to 1 to enable Spatial AQ (default false) | |
| -temporal-aq <boolean> E..V....... set to 1 to enable Temporal AQ (default false) | |
| -temporal_aq <boolean> E..V....... set to 1 to enable Temporal AQ (default false) | |
| -zerolatency <boolean> E..V....... Set 1 to indicate zero latency operation (no reordering delay) (default false) | |
| -nonref_p <boolean> E..V....... Set this to 1 to enable automatic insertion of non-reference P-frames (default false) | |
| -strict_gop <boolean> E..V....... Set 1 to minimize GOP-to-GOP rate fluctuations (default false) | |
| -aq-strength <int> E..V....... When Spatial AQ is enabled, this field is used to specify AQ strength. AQ strength scale is from 1 (low) - 15 (aggressive) (from 1 to 15) (default 8) | |
| -cq <float> E..V....... Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control (from 0 to 51) (default 0) | |
| -aud <boolean> E..V....... Use access unit delimiters (default false) | |
| -bluray-compat <boolean> E..V....... Bluray compatibility workarounds (default false) | |
| -init_qpP <int> E..V....... Initial QP value for P frame (from -1 to 51) (default -1) | |
| -init_qpB <int> E..V....... Initial QP value for B frame (from -1 to 51) (default -1) | |
| -init_qpI <int> E..V....... Initial QP value for I frame (from -1 to 51) (default -1) | |
| -qp <int> E..V....... Constant quantization parameter rate control method (from -1 to 51) (default -1) | |
| -qp_cb_offset <int> E..V....... Quantization parameter offset for cb channel (from -12 to 12) (default 0) | |
| -qp_cr_offset <int> E..V....... Quantization parameter offset for cr channel (from -12 to 12) (default 0) | |
| -weighted_pred <int> E..V....... Set 1 to enable weighted prediction (from 0 to 1) (default 0) | |
| -coder <int> E..V....... Coder type (from -1 to 2) (default default) | |
| default -1 E..V....... | |
| auto 0 E..V....... | |
| cabac 1 E..V....... | |
| cavlc 2 E..V....... | |
| ac 1 E..V....... | |
| vlc 2 E..V....... | |
| -b_ref_mode <int> E..V....... Use B frames as references (from -1 to 2) (default -1) | |
| disabled 0 E..V....... B frames will not be used for reference | |
| each 1 E..V....... Each B frame will be used for reference | |
| middle 2 E..V....... Only (number of B frames)/2 will be used for reference | |
| -a53cc <boolean> E..V....... Use A53 Closed Captions (if available) (default true) | |
| -dpb_size <int> E..V....... Specifies the DPB size used for encoding (0 means automatic) (from 0 to INT_MAX) (default 0) | |
| -multipass <int> E..V....... Set the multipass encoding (from 0 to 2) (default disabled) | |
| disabled 0 E..V....... Single Pass | |
| qres 1 E..V....... Two Pass encoding is enabled where first Pass is quarter resolution | |
| fullres 2 E..V....... Two Pass encoding is enabled where first Pass is full resolution | |
| -ldkfs <int> E..V....... Low delay key frame scale; Specifies the Scene Change frame size increase allowed in case of single frame VBV and CBR (from 0 to 255) (default 0) | |
| -extra_sei <boolean> E..V....... Pass on extra SEI data (e.g. a53 cc) to be included in the bitstream (default true) | |
| -udu_sei <boolean> E..V....... Pass on user data unregistered SEI if available (default false) | |
| -intra-refresh <boolean> E..V....... Use Periodic Intra Refresh instead of IDR frames (default false) | |
| -single-slice-intra-refresh <boolean> E..V....... Use single slice intra refresh (default false) | |
| -max_slice_size <int> E..V....... Maximum encoded slice size in bytes (from 0 to INT_MAX) (default 0) | |
| -constrained-encoding <boolean> E..V....... Enable constrainedFrame encoding where each slice in the constrained picture is independent of other slices (default false) | |
| -lookahead_level <int> E..V....... Specifies the lookahead level. Higher level may improve quality at the expense of performance. (from -1 to 15) (default -1) | |
| auto 15 E..V....... | |
| 0 0 E..V....... | |
| 1 1 E..V....... | |
| 2 2 E..V....... | |
| 3 3 E..V....... |
Use-case
Preserving original video footage for later editing
General lossless data archiving (video or non-video)
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what parameters are implied by -tune lossless?