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• Why are there vaapi filters that exist in libavfilter but do not exist in my compiled version of ffmpeg ?

  13 juin 2020, par John Allard

  I've compiled the most recent snapshot of ffmpeg with vaapi enabled

  



  $ ffmpeg -hwaccesls
ffmpeg version N-98129-g0b182ff Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
  configuration: --disable-debug --disable-doc --disable-ffplay --enable-shared --enable-avresample --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-gpl --enable-libass --enable-fontconfig --enable-libfreetype --enable-libvidstab --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxvid --enable-libx264 --enable-nonfree --enable-openssl --enable-libfdk_aac --enable-postproc --enable-small --enable-version3 --enable-libzmq --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-libopenjpeg --enable-libkvazaar --enable-libaom --extra-libs=-lpthread --enable-libsrt --enable-vaapi --extra-cflags=-I/opt/ffmpeg/include --extra-ldflags=-L/opt/ffmpeg/lib
  libavutil      56. 54.100 / 56. 54.100
  libavcodec     58. 92.100 / 58. 92.100
  libavformat    58. 46.101 / 58. 46.101
  libavdevice    58. 11.100 / 58. 11.100
  libavfilter     7. 86.100 /  7. 86.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Hardware acceleration methods:
vaapi


  



  I know that vaapi is working because I can use it for hardware decoding and encoding of h264 videos. I can see some vaapi filters as well

  



  $ ffmpeg -filters | grep vaapi
 ... deinterlace_vaapi V->V       (null)
 ... denoise_vaapi     V->V       (null)
 ... procamp_vaapi     V->V       (null)
 ... scale_vaapi       V->V       (null)
 ... sharpness_vaapi   V->V       (null)


  



  However, I notice that this list is missing the filter that I'm specifically looking for, namely , transpose_vaapi. If you look in the libavfilter source code you'll see the following

  



  This shows the transpose_vaapi filter defined in the allfilters.c file
https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/allfilters.c#L414

  



  This shows the transpose_vaapi filter source code
https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/vf_transpose_vaapi.c

  



  If the filter is defined in source code, it's defined in allfilters.c, and I've compiled ffmpeg from this source with vaapi enabled, why can I not use this filter with ffmpeg ?

  



  $ ffmpeg -y -hide_banner -nostats -loglevel error \
    -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi \
    -i ./test_video.mp4 \
    -vf 'format=nv12,transpose_vaapi=2' \
    -c:v h264_vaapi \
    /tmp/rotated_video.mp4
[AVFilterGraph @ 0xf14000] No such filter: 'transpose_vaapi'
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument


  



  EDIT -

  



  Looking through the source code for vf_transpose_vaapi.c I see the following logic

  



      if (!pipeline_caps.rotation_flags) {
        av_log(avctx, AV_LOG_ERROR, "VAAPI driver doesn't support transpose\n");
        return AVERROR(EINVAL);
    }


  



  that's inside of the transpose_vaapi_build_filter_params function which is part of the filter initialization process. I guess it's possible that, if that call failed, the filter would fail to be built and it would not be registered as a valid filter ? This seems like something that would happen at runtime when I attempt to run the filter rather than something that would happen at compile time when setting which filters are defined.

  


• doc/encoders : fix the misleading usage of profile

  20 juin 2020, par Limin Wang

  doc/encoders : fix the misleading usage of profile
  users are getting mislead by the integer, although profile
  
  can support both const string and integer.
  
  http://ffmpeg.org/pipermail/ffmpeg-user/2020-June/049025.html
  Also fix the order of high and main, it's not my intention.
  Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
  

  • [DH] doc/encoders.texi

• FFMPEG mp4 copied to matroska loses last frame

  16 juin 2020, par Mike

  I am running this simple ffmpeg command to change an mp4 video to matroska format so it can support streaming. ffmpeg -i test.mp4 -c copy out.mkv. My issue is that the out.mkv file has one less frame than the original mp4 file. It seems to be missing the last frame.

  



  I thought using copy as the codec should retain the same video. Am I missing passing an option to FFmpeg ? Thanks.

  



  EDIT : Full Log

  



  ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.59)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.3_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01T00:00:00.000000Z
    encoder         : Lavf53.24.2
  Duration: 00:00:29.57, start: 0.000000, bitrate: 1421 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1032 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler
File 'out.mkv' already exists. Overwrite ? [y/N] y
Output #0, matroska, to 'out.mkv':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1032 kb/s, 25 fps, 25 tbr, 1k tbn, 12800 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 5.1, fltp, 383 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=  739 fps=0.0 q=-1.0 Lsize=    5129kB time=00:00:29.54 bitrate=1422.0kbits/s speed= 493x
video:3727kB audio:1386kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.309803%