Il giorno dom 7 nov 2021 alle ore 17:49 Dennis Mungai <dmng...@gmail.com>
ha scritto:
> On Sun, 7 Nov 2021 at 15:52, Fabrizio Negro <trykonas...@gmail.com> wrote:
>
> > Hello!
> > I recently started using FFmpeg to convert files.
> > Specifically I am trying to encode with FFmpeg in H264 - NVENC trying to
> > get the same export quality as Davinci Resolve that uses the NVIDIA
> > encoder.
> > Unfortunately I'm not succeeding and I think it's because FFmpeg doesn't
> > accept -rc: v vbr_hq (VBR High Quality) but only -rc: v vbr (VBR).
> > I don't understand why since -rc: v vbr_hq falls under the H264 - NVENC
> > options of FFmpeg.
> > Can someone help me?
> > Thanks!
> > (I am a Windows user)
> >
> >
> > ffmpeg -c:v h264_nvenc -preset:v p7 -tune:v ull -profile:v high -rc:v vbr
> > -cq:v 1 -b:v 25000k -maxrate:v 25000k -bufsize:v 13000k
> >
> >
> Can you provide:
>
> 1. The ffmpeg version you're running? ffmpeg -builldconf should print that
> out, and
> 2. The nvenc encoder wrapper options available to your build? Run ffmpeg -h
> encoder=h264_nvenc and attach that to this thread.
>
> From there, you can be assisted.
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C:\ffmpeg\bin>ffmpeg.exe -h encoder=h264_nvenc
ffmpeg version 2021-10-03-git-2761a7403b-full_build-www.gyan.dev Copyright (c)
2000-2021 the FFmpeg developers
built with gcc 10.3.0 (Rev5, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static
--disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy
--enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq
--enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2
--enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
--enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass
--enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab
--enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm
--enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
--enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang
--enable-vulkan --enable-opencl --enable-libcdio --enable-libgme
--enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb
--enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame
--enable-libvo-amrwbenc --enable-libilbc --enable-libgsm
--enable-libopencore-amrnb --enable-libopus --enable-libspeex
--enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite
--enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 57. 7.100 / 57. 7.100
libavcodec 59. 10.100 / 59. 10.100
libavformat 59. 5.100 / 59. 5.100
libavdevice 59. 0.101 / 59. 0.101
libavfilter 8. 11.100 / 8. 11.100
libswscale 6. 1.100 / 6. 1.100
libswresample 4. 0.100 / 4. 0.100
libpostproc 56. 0.100 / 56. 0.100
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 rgb0 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 8388612 E..V....... Variable bitrate mode with MinQP
(deprecated)
ll_2pass_quality 8388616 E..V....... Multi-pass optimized for image
quality (deprecated)
ll_2pass_size 8388624 E..V....... Multi-pass optimized for constant
frame size (deprecated)
vbr_2pass 8388640 E..V....... Multi-pass variable bitrate mode
(deprecated)
cbr_ld_hq 8388616 E..V....... Constant bitrate low delay high
quality mode
cbr_hq 8388624 E..V....... Constant bitrate high quality mode
vbr_hq 8388640 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
-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
0 to 2) (default disabled)
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)
-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)
-constrained-encoding <boolean> E..V....... Enable constrainedFrame
encoding where each slice in the constrained picture is independent of other
slices (default false)_______________________________________________
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