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• Merge commit ’c042cbc3a68d09a20cfd75fb4a4eff0534253081’

  31 mars 2014, par Michael Niedermayer

  Merge commit ’c042cbc3a68d09a20cfd75fb4a4eff0534253081’
  * commit ’c042cbc3a68d09a20cfd75fb4a4eff0534253081’ :
  
    libx265 : Use the repeat headers flag when not using global headers
  See : 1b28d9b357db2b6f8360e68c03247d3b81655b10
  
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

• Merge commit ’ec217218c27d53c5b323323e6ef862bcdbcabe5f’

  9 septembre 2014, par Michael Niedermayer

  Merge commit ’ec217218c27d53c5b323323e6ef862bcdbcabe5f’
  * commit ’ec217218c27d53c5b323323e6ef862bcdbcabe5f’ :
  
    x86inc : Free up variable name "n" in global namespace
  See : a4dbabc8b3c123c071c925d2d749a50e4895ebcd
  
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

• Redux : how to add subtitles to mp4 using ffmpeg ?

  25 novembre 2015, par stachyra

  I have a tiny little example mp4 video (which unfortunately stack overflow won’t allow me to embed directly inside my question). Following the advice previously offered in this answer, I’d like to add a subtitle to the video, which will flash on the screen for 2 seconds, using an .srt file that looks like this :

  1
  
  00:00:02,000 --> 00:00:04,000
  
  Test subtitle

  As provided in the link above, I issue a command that looks like this :

  ffmpeg -i small.mp4 -f srt -i small.srt -c:v copy -c:a copy -c:s mov_text small_subtitles.mp4 >& err.log

  And the err.log file looks like this :

  ffmpeg version N-76950-g401c93d-tessus Copyright (c) 2000-2015 the FFmpeg developers
  
  built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --as=yasm --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
  
    libavutil      55.  7.100 / 55.  7.100
  
    libavcodec     57. 15.100 / 57. 15.100
  
    libavformat    57. 17.100 / 57. 17.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 15.100 /  6. 15.100
  
    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 'small.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
    Duration: 00:00:10.02, start: 0.000000, bitrate: 23 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 188x112 [SAR 1:1 DAR 47:28], 17 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Input #1, srt, from 'small.srt':
  
    Duration: N/A, bitrate: N/A
  
  Stream #1:0: Subtitle: subrip
  
  [mp4 @ 0x7f8492848000] Codec for stream 0 does not use global headers but container format requires global headers
  
  Output #0, mp4, to 'small_subtitles.mp4':
  
    Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2avc1mp41
  
  encoder         : Lavf57.17.100
  
  Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 188x112 [SAR 1:1 DAR 47:28], q=2-31, 17 kb/s, 60 fps, 60 tbr, 15360 tbn, 15360 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Stream #0:1: Subtitle: mov_text ([8][0][0][0] / 0x0008) (default)
  
  Metadata:
  
    encoder         : Lavc57.15.100 mov_text
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #0:1 (subrip (srt) -> mov_text (native))
  
  Press [q] to stop, [?] for help
  
  frame=  601 fps=0.0 q=-1.0 Lsize=      29kB time=00:00:09.96 bitrate=  24.0kbits/s    
  
  video:21kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 39.561928%

  The resulting output, small_subtitles.mp4, does not seem to have the expected subtitle present.

  Furthermore, the error message,

  [mp4 @ 0x7f8492848000] Codec for stream 0 does not use global headers but container format requires global headers

  is highlighted in bold colors when I run this at the command line without capturing the err.log file (which makes me think it must be a significant message), although I am unable to reproduce that special print formatting easily here.

  I’ve also tried this method, but with the .avi replaced by .mp4, and it seems to just fail silently—no obvious error message, but also no subtitle in the resulting video either.

  Anybody have an idea how to fix this ? In particular, what does the business about global headers mean ?

  I’m working on OS X and am open to hearing answers that would use other open source tools as well.