A question on H.264 High 4:4:4 Predictive decode support on NVIDIA Pascal hardware via nvdec

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A question on H.264 High 4:4:4 Predictive decode support on NVIDIA Pascal hardware via nvdec

Brainiarc7
Hello there,

I have a sample file with the following attributes:

ffprobe -i rv.mkv
ffprobe version N-93814-g48539b62fc Copyright (c) 2007-2019 the FFmpeg
developers
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
  configuration: --pkg-config-flags=--static --prefix=/home/brainiarc7/bin
--bindir=/home/brainiarc7/bin --extra-cflags=-I/home/brainiarc7/bin/include
--extra-ldflags=-L/home/brainiarc7/bin/lib --enable-cuda-nvcc
--enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/
--extra-ldflags=-L/usr/local/cuda/lib64/ --enable-nvenc
--extra-cflags=-I/opt/intel/mediasdk/include
--extra-ldflags=-L/opt/intel/mediasdk/lib
--extra-ldflags=-L/opt/intel/mediasdk/plugins --enable-libmfx
--enable-libass --enable-vaapi --disable-debug --enable-libvorbis
--enable-libvpx --enable-libdrm --enable-opencl --enable-gpl --cpu=native
--enable-opengl --enable-libfdk-aac --enable-libx265 --enable-openssl
--extra-libs='-lpthread -lm -lz' --enable-nonfree
  libavutil      56. 26.101 / 56. 26.101
  libavcodec     58. 52.101 / 58. 52.101
  libavformat    58. 27.103 / 58. 27.103
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 50.100 /  7. 50.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
Input #0, matroska,webm, from 'rv.mkv':
  Metadata:
    ENCODER         : Lavf58.27.102
  Duration: 00:02:24.77, start: 0.000000, bitrate: 20063 kb/s
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p(progressive),
2560x1440, 60 fps, 60 tbr, 1k tbn, 120 tbc (default)
    Metadata:
      ENCODER         : Lavc58.51.100 libx264
      DURATION        : 00:02:24.767000000


Attempting to use either cuvid,nvdec or auto (which selects cuda) for
hwaccel results in the following message:

[h264 @ 0x55ff3d516880] Hardware is lacking required capabilities
[h264 @ 0x55ff3d516880] Failed setup for format cuda: hwaccel
initialisation returned error.

But the encode session runs to completion.

Explicitly setting hwaccel to vdpau fails as such:

[h264 @ 0x560d4b9f3340] hardware accelerator failed to decode picture
Error while decoding stream #0:0: Input/output error
[h264 @ 0x560d4b9f9280] hardware accelerator failed to decode picture
Error while decoding stream #0:0: Input/output error
[h264 @ 0x560d4bd5a8c0] hardware accelerator failed to decode picture
Error while decoding stream #0:0: Input/output error
[matroska,webm @ 0x560d4b9d2bc0] Element at 0x15a3f012 ending at 0x15a3f0a4
exceeds containing master element ending at 0x15a3f006
[h264 @ 0x560d4bf22d00] hardware accelerator failed to decode picture
Error while decoding stream #0:0: Input/output error
    Last message repeated 11 times
Output #0, mp4, to
'/home/brainiarc7/Desktop/src/benchmarks/final/benchmark-nvenc-file.mp4':
  Metadata:
    encoder         : Lavf58.27.103
    Stream #0:0: Video: h264 (h264_nvenc) (High 4:4:4 Predictive) (avc1 /
0x31637661), yuv444p, 2560x1440, q=-1--1, 7500 kb/s, 60 fps, 15360 tbn, 60
tbc (default)
    Metadata:
      DURATION        : 00:02:24.767000000
      encoder         : Lavc58.52.101 h264_nvenc
    Side data:
      cpb: bitrate max/min/avg: 15000000/0/7500000 buffer size: 15000000
vbv_delay: -1
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A
speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Conversion failed!

In this case, with vdpau, the error is not recoverable and the encoder
fails.

The command used:

ffmpeg -y -stats -hwaccel nvdec \
-i $(pwd)/rv.mkv  \
-c:v h264_nvenc -bf:v 3 -rc:v vbr_hq  -qp:v 19 -profile:v main  \
-b:v 7.5M -maxrate:v 15M -r:v 60  -an -f mp4 $(pwd)/benchmark-nvenc-file.mp4


FFmpeg version used:

ffmpeg
ffmpeg version N-93814-g48539b62fc Copyright (c) 2000-2019 the FFmpeg
developers
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
  configuration: --pkg-config-flags=--static --prefix=/home/brainiarc7/bin
--bindir=/home/brainiarc7/bin --extra-cflags=-I/home/brainiarc7/bin/include
--extra-ldflags=-L/home/brainiarc7/bin/lib --enable-cuda-nvcc
--enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/
--extra-ldflags=-L/usr/local/cuda/lib64/ --enable-nvenc
--extra-cflags=-I/opt/intel/mediasdk/include
--extra-ldflags=-L/opt/intel/mediasdk/lib
--extra-ldflags=-L/opt/intel/mediasdk/plugins --enable-libmfx
--enable-libass --enable-vaapi --disable-debug --enable-libvorbis
--enable-libvpx --enable-libdrm --enable-opencl --enable-gpl --cpu=native
--enable-opengl --enable-libfdk-aac --enable-libx265 --enable-openssl
--extra-libs='-lpthread -lm -lz' --enable-nonfree
  libavutil      56. 26.101 / 56. 26.101
  libavcodec     58. 52.101 / 58. 52.101
  libavformat    58. 27.103 / 58. 27.103
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 50.100 /  7. 50.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options]
outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'

The GPU matrix published by NVIDIA only indicates support for HEVC @ 4:4:4
: https://developer.nvidia.com/video-encode-decode-gpu-support-matrix. That
page indicates support for H.264 4:4:4 in NVENC (as from GM107+) but
information on decode capability on the same is absent.

According to the commit:
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/83c7ac2e47efd96927127c1c385cdbb5fb53cb02

Only two codecs can handle 4:4:4: HEVC and MJPEG.
Would this imply that support for H.264 @ 4:4:4 is either unsupported (in
hardware, as implied above) or  omitted in FFmpeg? Please clarify.

Thanks for your time,

Dennis.
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Re: A question on H.264 High 4:4:4 Predictive decode support on NVIDIA Pascal hardware via nvdec

Brainiarc7
On Thu, 9 May 2019 at 02:44, Dennis Mungai <[hidden email]> wrote:

> Hello there,
>
> I have a sample file with the following attributes:
>
> ffprobe -i rv.mkv
> ffprobe version N-93814-g48539b62fc Copyright (c) 2007-2019 the FFmpeg
> developers
>   built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
>   configuration: --pkg-config-flags=--static --prefix=/home/brainiarc7/bin
> --bindir=/home/brainiarc7/bin --extra-cflags=-I/home/brainiarc7/bin/include
> --extra-ldflags=-L/home/brainiarc7/bin/lib --enable-cuda-nvcc
> --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/
> --extra-ldflags=-L/usr/local/cuda/lib64/ --enable-nvenc
> --extra-cflags=-I/opt/intel/mediasdk/include
> --extra-ldflags=-L/opt/intel/mediasdk/lib
> --extra-ldflags=-L/opt/intel/mediasdk/plugins --enable-libmfx
> --enable-libass --enable-vaapi --disable-debug --enable-libvorbis
> --enable-libvpx --enable-libdrm --enable-opencl --enable-gpl --cpu=native
> --enable-opengl --enable-libfdk-aac --enable-libx265 --enable-openssl
> --extra-libs='-lpthread -lm -lz' --enable-nonfree
>   libavutil      56. 26.101 / 56. 26.101
>   libavcodec     58. 52.101 / 58. 52.101
>   libavformat    58. 27.103 / 58. 27.103
>   libavdevice    58.  7.100 / 58.  7.100
>   libavfilter     7. 50.100 /  7. 50.100
>   libswscale      5.  4.100 /  5.  4.100
>   libswresample   3.  4.100 /  3.  4.100
>   libpostproc    55.  4.100 / 55.  4.100
> Input #0, matroska,webm, from 'rv.mkv':
>   Metadata:
>     ENCODER         : Lavf58.27.102
>   Duration: 00:02:24.77, start: 0.000000, bitrate: 20063 kb/s
>     Stream #0:0: Video: h264 (High 4:4:4 Predictive),
> yuv444p(progressive), 2560x1440, 60 fps, 60 tbr, 1k tbn, 120 tbc (default)
>     Metadata:
>       ENCODER         : Lavc58.51.100 libx264
>       DURATION        : 00:02:24.767000000
>
>
> Attempting to use either cuvid,nvdec or auto (which selects cuda) for
> hwaccel results in the following message:
>
> [h264 @ 0x55ff3d516880] Hardware is lacking required capabilities
> [h264 @ 0x55ff3d516880] Failed setup for format cuda: hwaccel
> initialisation returned error.
>
> But the encode session runs to completion.
>
> Explicitly setting hwaccel to vdpau fails as such:
>
> [h264 @ 0x560d4b9f3340] hardware accelerator failed to decode picture
> Error while decoding stream #0:0: Input/output error
> [h264 @ 0x560d4b9f9280] hardware accelerator failed to decode picture
> Error while decoding stream #0:0: Input/output error
> [h264 @ 0x560d4bd5a8c0] hardware accelerator failed to decode picture
> Error while decoding stream #0:0: Input/output error
> [matroska,webm @ 0x560d4b9d2bc0] Element at 0x15a3f012 ending at
> 0x15a3f0a4 exceeds containing master element ending at 0x15a3f006
> [h264 @ 0x560d4bf22d00] hardware accelerator failed to decode picture
> Error while decoding stream #0:0: Input/output error
>     Last message repeated 11 times
> Output #0, mp4, to
> '/home/brainiarc7/Desktop/src/benchmarks/final/benchmark-nvenc-file.mp4':
>   Metadata:
>     encoder         : Lavf58.27.103
>     Stream #0:0: Video: h264 (h264_nvenc) (High 4:4:4 Predictive) (avc1 /
> 0x31637661), yuv444p, 2560x1440, q=-1--1, 7500 kb/s, 60 fps, 15360 tbn, 60
> tbc (default)
>     Metadata:
>       DURATION        : 00:02:24.767000000
>       encoder         : Lavc58.52.101 h264_nvenc
>     Side data:
>       cpb: bitrate max/min/avg: 15000000/0/7500000 buffer size: 15000000
> vbv_delay: -1
> frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A
> speed=   0x
> video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: unknown
> Conversion failed!
>
> In this case, with vdpau, the error is not recoverable and the encoder
> fails.
>
> The command used:
>
> ffmpeg -y -stats -hwaccel nvdec \
> -i $(pwd)/rv.mkv  \
> -c:v h264_nvenc -bf:v 3 -rc:v vbr_hq  -qp:v 19 -profile:v main  \
> -b:v 7.5M -maxrate:v 15M -r:v 60  -an -f mp4
> $(pwd)/benchmark-nvenc-file.mp4
>
>
> FFmpeg version used:
>
> ffmpeg
> ffmpeg version N-93814-g48539b62fc Copyright (c) 2000-2019 the FFmpeg
> developers
>   built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
>   configuration: --pkg-config-flags=--static --prefix=/home/brainiarc7/bin
> --bindir=/home/brainiarc7/bin --extra-cflags=-I/home/brainiarc7/bin/include
> --extra-ldflags=-L/home/brainiarc7/bin/lib --enable-cuda-nvcc
> --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/
> --extra-ldflags=-L/usr/local/cuda/lib64/ --enable-nvenc
> --extra-cflags=-I/opt/intel/mediasdk/include
> --extra-ldflags=-L/opt/intel/mediasdk/lib
> --extra-ldflags=-L/opt/intel/mediasdk/plugins --enable-libmfx
> --enable-libass --enable-vaapi --disable-debug --enable-libvorbis
> --enable-libvpx --enable-libdrm --enable-opencl --enable-gpl --cpu=native
> --enable-opengl --enable-libfdk-aac --enable-libx265 --enable-openssl
> --extra-libs='-lpthread -lm -lz' --enable-nonfree
>   libavutil      56. 26.101 / 56. 26.101
>   libavcodec     58. 52.101 / 58. 52.101
>   libavformat    58. 27.103 / 58. 27.103
>   libavdevice    58.  7.100 / 58.  7.100
>   libavfilter     7. 50.100 /  7. 50.100
>   libswscale      5.  4.100 /  5.  4.100
>   libswresample   3.  4.100 /  3.  4.100
>   libpostproc    55.  4.100 / 55.  4.100
> Hyper fast Audio and Video encoder
> usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options]
> outfile}...
>
> Use -h to get full help or, even better, run 'man ffmpeg'
>
> The GPU matrix published by NVIDIA only indicates support for HEVC @ 4:4:4
> : https://developer.nvidia.com/video-encode-decode-gpu-support-matrix.
> That page indicates support for H.264 4:4:4 in NVENC (as from GM107+) but
> information on decode capability on the same is absent.
>
> According to the commit:
> https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/83c7ac2e47efd96927127c1c385cdbb5fb53cb02
>
> Only two codecs can handle 4:4:4: HEVC and MJPEG.
> Would this imply that support for H.264 @ 4:4:4 is either unsupported (in
> hardware, as implied above) or  omitted in FFmpeg? Please clarify.
>
> Thanks for your time,
>
> Dennis.
>

To clarify: This was ran on a GTX 1070.
According to vdpauinfo, H.264 4:4:4 Predictive profile is supported:

vdpauinfo
display: :0   screen: 0
API version: 1
Information string: NVIDIA VDPAU Driver Shared Library  430.09  Thu Apr 18
02:24:44 CDT 2019

Video surface:

name   width height types
-------------------------------------------
420     8192  8192  NV12 YV12
422     8192  8192  UYVY YUYV
444     8192  8192

Decoder capabilities:

name                        level macbs width height
----------------------------------------------------
MPEG1                           0 65536  4096  4096
MPEG2_SIMPLE                    3 65536  4096  4096
MPEG2_MAIN                      3 65536  4096  4096
H264_BASELINE                  51 65536  4096  4096
H264_MAIN                      51 65536  4096  4096
H264_HIGH                      51 65536  4096  4096
VC1_SIMPLE                      1  8190  2048  2048
VC1_MAIN                        2  8190  2048  2048
VC1_ADVANCED                    4  8190  2048  2048
MPEG4_PART2_SP                  3  8192  2048  2048
MPEG4_PART2_ASP                 5  8192  2048  2048
DIVX4_QMOBILE                   0  8192  2048  2048
DIVX4_MOBILE                    0  8192  2048  2048
DIVX4_HOME_THEATER              0  8192  2048  2048
DIVX4_HD_1080P                  0  8192  2048  2048
DIVX5_QMOBILE                   0  8192  2048  2048
DIVX5_MOBILE                    0  8192  2048  2048
DIVX5_HOME_THEATER              0  8192  2048  2048
DIVX5_HD_1080P                  0  8192  2048  2048
H264_CONSTRAINED_BASELINE      51 65536  4096  4096
H264_EXTENDED                  51 65536  4096  4096
H264_PROGRESSIVE_HIGH          51 65536  4096  4096
H264_CONSTRAINED_HIGH          51 65536  4096  4096
H264_HIGH_444_PREDICTIVE       51 65536  4096  4096
HEVC_MAIN                      153 262144  8192  8192
HEVC_MAIN_10                   --- not supported ---
HEVC_MAIN_STILL                --- not supported ---
HEVC_MAIN_12                   --- not supported ---
HEVC_MAIN_444                  --- not supported ---

Output surface:

name              width height nat types
----------------------------------------------------
B8G8R8A8         32768 32768    y  Y8U8V8A8 V8U8Y8A8 A4I4 I4A4 A8I8 I8A8
R10G10B10A2      32768 32768    y  Y8U8V8A8 V8U8Y8A8 A4I4 I4A4 A8I8 I8A8

Bitmap surface:

name              width height
------------------------------
B8G8R8A8         32768 32768
R8G8B8A8         32768 32768
R10G10B10A2      32768 32768
B10G10R10A2      32768 32768
A8               32768 32768

Video mixer:

feature name                    sup
------------------------------------
DEINTERLACE_TEMPORAL             y
DEINTERLACE_TEMPORAL_SPATIAL     y
INVERSE_TELECINE                 y
NOISE_REDUCTION                  y
SHARPNESS                        y
LUMA_KEY                         y
HIGH QUALITY SCALING - L1        y
HIGH QUALITY SCALING - L2        -
HIGH QUALITY SCALING - L3        -
HIGH QUALITY SCALING - L4        -
HIGH QUALITY SCALING - L5        -
HIGH QUALITY SCALING - L6        -
HIGH QUALITY SCALING - L7        -
HIGH QUALITY SCALING - L8        -
HIGH QUALITY SCALING - L9        -

parameter name                  sup      min      max
-----------------------------------------------------
VIDEO_SURFACE_WIDTH              y         1     8192
VIDEO_SURFACE_HEIGHT             y         1     8192
CHROMA_TYPE                      y
LAYERS                           y         0        4

attribute name                  sup      min      max
-----------------------------------------------------
BACKGROUND_COLOR                 y
CSC_MATRIX                       y
NOISE_REDUCTION_LEVEL            y      0.00     1.00
SHARPNESS_LEVEL                  y     -1.00     1.00
LUMA_KEY_MIN_LUMA                y
LUMA_KEY_MAX_LUMA                y
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Re: A question on H.264 High 4:4:4 Predictive decode support on NVIDIA Pascal hardware via nvdec

Brainiarc7
On Thu, 9 May 2019 at 03:06, Philip Langdale <[hidden email]> wrote:

> On Thu, 9 May 2019 02:53:01 +0300
> Dennis Mungai <[hidden email]> wrote:
>
> > >
> > > The GPU matrix published by NVIDIA only indicates support for HEVC
> > > @ 4:4:4 :
> > > https://developer.nvidia.com/video-encode-decode-gpu-support-matrix.
> > > That page indicates support for H.264 4:4:4 in NVENC (as from
> > > GM107+) but information on decode capability on the same is absent.
> > >
> > > According to the commit:
> > >
> https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/83c7ac2e47efd96927127c1c385cdbb5fb53cb02
> > >
> > > Only two codecs can handle 4:4:4: HEVC and MJPEG.
> > > Would this imply that support for H.264 @ 4:4:4 is either
> > > unsupported (in hardware, as implied above) or  omitted in FFmpeg?
> > > Please clarify.
> > >
> > > Thanks for your time,
> > >
> > > Dennis.
>
> No hardware supports decoding of 4:4:4 h.264 content, and I'm sure
> nvidia will never add it, given that h.264 is now old news. They
> support decoding 4:2:0 content that was encoded with the high444p
> profile, for whatever that's worth, but that's why the profile is
> listed as supported.
>
> --phil
>

Thanks for the clarification.
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