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• FFmpeg Hardware Acceleration with NVENC produces Half Green output video

  17 juin 2016, par Dan Sandland

  Using the FFmpeg build found here : https://github.com/illuspas/ffmpeg-hw-win32

  gcc 5.3.0
  
  --enable-nvenc nvidia_video_sdk_6.0.1
  
  --enable-libmfx Intel(R)_Media_SDK_2016.0.1
  
  --enable-libfdk-aac 0.1.4
  
  --enable-libspeex 1.2rc1
  
  --enable-libx264 1:148.20150725
  
  --enable-libopenh264 1.5.0
  
  --enable-libx265 1.8
  
  --enable-libopus 1.1.2
  
  --enable-libmp3lame 3.99.5
  
  --enable-libkvazaar 0.8.2

  ./configure —prefix=/home/aliang/FFmpeg/x86_64 —enable-small —disable-debug —disable-doc —arch=x86_64 —cc=’ccache x86_64-w64-mingw32-gcc’ —cross-prefix=x86_64-w64-mingw32- —enable-cross-compile —target-os=mingw32 —enable-libfdk-aac —enable-libmp3lame —enable-libopus —enable-libspeex —enable-libx264 —enable-libx265 —enable-libmfx —enable-nvenc —enable-libopenh264 —enable-libkvazaar —enable-gpl —enable-nonfree

  I’m running Windows on a MacBook Pro. I also tried with a more recent build and had the same output.

  Input video is from sample-videos.com.

  The ffmpeg command I am running is :

  ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4

  sample-out-nvenc.mp4 looks like this via ffplay or vlc :

  

  When I grab a frame using jpeg2, the colors appear normal, but the height is squished.

  ffmpeg -y -ss 15.5 -i sample.mp4 -vframes 1 -s 480x300 -f image2 grab.jpg

  

  The ffprobe results for the output (sample-out-nvenc.mp4) :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-out-nvenc.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
    Duration: 00:00:31.02, start: 0.021333, bitrate: 1994 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 1650 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 342 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  Lastly the output from the nvenc encoding command :

  ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4
  
  ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.3.0 (GCC)
  
    configuration: --prefix=/home/aliang/FFmpeg/x86_64 --enable-small --disable-debug --disable-doc --arch=x86_64 --cc='ccache x86_64-w64-mingw32-gcc' --cross-prefix=x86_64-w64-mingw32- --enable-cross-compile --target-os=mingw32 --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libspeex --enable-libx264 --enable-libx265 --enable-libmfx --enable-nvenc --enable-libopenh264 --enable-libkvazaar --enable-gpl --enable-nonfree
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:31.00, start: 0.000000, bitrate: 1353 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 966 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
  Output #0, mp4, to 'sample-out-nvenc.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
      Stream #0:0(und): Video: h264 (nvenc_h264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 2000 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.24.102 nvenc_h264
  
      Side data:
  
        unknown side data type 10 (24 bytes)
  
      Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, 5.1, fltp, 341 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
        encoder         : Lavc57.24.102 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (nvenc_h264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=  774 fps=253 q=-0.0 Lsize=    7551kB time=00:00:30.99 bitrate=1995.6kbits/s speed=10.1x
  
  video:6236kB audio:1297kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.243011%
  
  [aac @ 000001cdd9900520] Qavg: 743.457

• avcodec : add D3D12VA hardware accelerated H264 decoding

  5 décembre 2023, par Wu Jianhua

  avcodec : add D3D12VA hardware accelerated H264 decoding
  The implementation is based on :
  
  https://learn.microsoft.com/en-us/windows/win32/medfound/direct3d-12-video-overview
  With the Direct3D 12 video decoding support, we can render or process
  
  the decoded images by the pixel shaders or compute shaders directly
  
  without the extra copy overhead, which is beneficial especially if you
  
  are trying to render or post-process a 4K or 8K video.
  The command below is how to enable d3d12va :
  
  ffmpeg -hwaccel d3d12va -i input.mp4 output.mp4
  Signed-off-by : Wu Jianhua <toqsxw@outlook.com>
  
  Signed-off-by : Tong Wu <tong1.wu@intel.com>
  

  • [DH] configure
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/d3d11va.h
  • [DH] libavcodec/d3d12va_decode.c
  • [DH] libavcodec/d3d12va_decode.h
  • [DH] libavcodec/d3d12va_h264.c
  • [DH] libavcodec/dxva2.c
  • [DH] libavcodec/dxva2.h
  • [DH] libavcodec/dxva2_av1.c
  • [DH] libavcodec/dxva2_h264.c
  • [DH] libavcodec/dxva2_hevc.c
  • [DH] libavcodec/dxva2_internal.h
  • [DH] libavcodec/dxva2_mpeg2.c
  • [DH] libavcodec/dxva2_vc1.c
  • [DH] libavcodec/dxva2_vp9.c
  • [DH] libavcodec/h264_slice.c
  • [DH] libavcodec/h264dec.c
  • [DH] libavcodec/hwaccels.h
  • [DH] libavcodec/hwconfig.h

• Deprecate obsolete XvMC hardware decoding support

  5 novembre 2013, par Diego Biurrun

  Deprecate obsolete XvMC hardware decoding support
  XvMC has long ago been superseded by newer acceleration APIs, such as
  
  VDPAU, and few downstreams still support it. Furthermore XvMC is not
  
  implemented within the hwaccel framework, but requires its own specific
  
  code in the MPEG-1/2 decoder, which is a maintenance burden.
  

  • [DBH] doc/general.texi
  • [DBH] libavcodec/allcodecs.c
  • [DBH] libavcodec/avcodec.h
  • [DBH] libavcodec/codec_desc.c
  • [DBH] libavcodec/error_resilience.c
  • [DBH] libavcodec/mpeg12.c
  • [DBH] libavcodec/mpeg12dec.c
  • [DBH] libavcodec/mpegvideo.c
  • [DBH] libavcodec/mpegvideo_xvmc.c
  • [DBH] libavcodec/options_table.h
  • [DBH] libavcodec/version.h
  • [DBH] libavcodec/x86/dsputil_init.c
  • [DBH] libavcodec/xvmc.h
  • [DBH] libavcodec/xvmc_internal.h
  • [DBH] libavutil/old_pix_fmts.h
  • [DBH] libavutil/pixdesc.c
  • [DBH] libavutil/pixfmt.h
  • [DBH] libavutil/version.h