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• 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 black screen using mpeg2video

  16 juin 2020, par Konata

  I have a proprietary piece of hardware for broadcasting, that accepts extremely specific video format.
The software that we use for it is extremely slow and outdated.

  



  I was looking at adapting FFmpeg to convert .avi/.mp4/etc to the specific format which in our case is

  



  


  .mpg ( 720*576 16:9, 25FPS, MPEG Video PAL v.2 (Main@High) BVOP)
 acceptable bitrate is 9000k - 15000k.

  


  



  So I have constructed this FFmpeg command :

  



  -i input.avi -codec:a mp2 -b:a 384k -c:v mpeg2video -aspect 16:9 -bf 2 -b:v 10000k -maxrate 10000k -minrate 10000k -bufsize 5000k  -profile:v main -level:v 4.0 output.mpg

  



  The audio is working fine, but instead of video I get a black screen, this is the conversion log

  



  "E:\auto_video\ffmpeg\bin\ffmpeg.exe" -i input.avi -codec:a mp2 -b:a 384k -c:v mpeg2video -aspect 16:9 -bf 2 -b:v 10000k -maxrate 10000k -minrate 10000k -bufsize 5000k -r 25  -profile:v main -level:v 4.0 output.mpg
ffmpeg version git-2020-06-12-38737b3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  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
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from 'input.avi':
  Metadata:
    date            : 2020-06-04T14:11:03+06:00
  Duration: 00:00:10.00, start: 0.000000, bitrate: 30465 kb/s
    Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28915 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
File 'output.mpg' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (dvvideo (native) -> mpeg2video (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp2 (native))
Press [q] to stop, [?] for help
Output #0, mpeg, to 'output.mpg':
  Metadata:
    date            : 2020-06-04T14:11:03+06:00
    encoder         : Lavf58.46.101
    Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 10000 kb/s, 25 fps, 90k tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.92.100 mpeg2video
    Side data:
      cpb: bitrate max/min/avg: 10000000/10000000/10000000 buffer size: 5000000 vbv_delay: N/A
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    Metadata:
      encoder         : Lavc58.92.100 mp2
frame=  250 fps=0.0 q=2.5 Lsize=   12574kB time=00:00:09.99 bitrate=10302.7kbits/s speed=16.8x
video:12054kB audio:469kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.402694%"E:\auto_video\ffmpeg\bin\ffmpeg.exe" -i input.avi -codec:a mp2 -b:a 384k -c:v mpeg2video -aspect 16:9 -bf 2 -b:v 10000k -maxrate 10000k -minrate 10000k -bufsize 5000k -r 25  -profile:v main -level:v 4.0 output.mpg
ffmpeg version git-2020-06-12-38737b3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  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
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from 'input.avi':
  Metadata:
    date            : 2020-06-04T14:11:03+06:00
  Duration: 00:00:10.00, start: 0.000000, bitrate: 30465 kb/s
    Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28915 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
File 'output.mpg' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (dvvideo (native) -> mpeg2video (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp2 (native))
Press [q] to stop, [?] for help
Output #0, mpeg, to 'output.mpg':
  Metadata:
    date            : 2020-06-04T14:11:03+06:00
    encoder         : Lavf58.46.101
    Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 10000 kb/s, 25 fps, 90k tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.92.100 mpeg2video
    Side data:
      cpb: bitrate max/min/avg: 10000000/10000000/10000000 buffer size: 5000000 vbv_delay: N/A
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    Metadata:
      encoder         : Lavc58.92.100 mp2
frame=  250 fps=0.0 q=2.5 Lsize=   12574kB time=00:00:09.99 bitrate=10302.7kbits/s speed=16.8x
video:12054kB audio:469kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.402694%


  



  Additional info that might help, I get black screen in MPC-HC, Windows Media Player, and the actual hardware that I converted it for. But it plays fine in VLC

  


• 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%