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• avformat/matroskadec : Add support for FlagTextDescriptions

  16 février 2021, par Andreas Rheinhardt

  avformat/matroskadec : Add support for FlagTextDescriptions
  This is the equivalent of the WebM "D_WEBVTT/DESCRIPTIONS" and is
  
  therefore only exported for subtitles.
  Reviewed-by : Ridley Combs <rcombs@rcombs.me>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/matroska.h
  • [DH] libavformat/matroskadec.c

• avformat/segment : Fix leak of duration/framenumber lists upon error

  5 septembre 2020, par Andreas Rheinhardt

  avformat/segment : Fix leak of duration/framenumber lists upon error
  The code to free them is not in the segment muxer's deinit function,
  
  but in its write_trailer function which means that these lists leak if
  
  write_trailer isn't called after their allocation. This happens e.g. if
  
  the given lists are invalid (e.g. consisting only of ',' (which delimit
  
  entries)), so that parsing them fails and so does the muxer's init
  
  function ; write_trailer is then never called.
  This has been fixed by moving the code to free them to the deinit
  
  function.
  Reviewed-by : Ridley Combs <rcombs@rcombs.me>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/segment.c

• How to use temporary files and replace the input when using ffmpeg in batch ?

  18 juin 2020, par Fabio Freitas

  What I did so far :

  



  I learned with this answer that I can use negative mapping to remove unwanted streams (extra audio, subtitles) from my video files.

  



  I them proceeded to apply it to a few dozen files in a folder using a simple for /r loop on Windows' cmd. Since I thought this process as some kind of trim, I didn't care about my original files and wanted ffmpeg to replace them, which of course it cannot.

  



  I tried to search a bit further and find ways to work around this issue without simply using a new destination an manually replacing files afterwards, but had no luck.

  



  However a lot of my findings seemed to indicate that ffmpeg has capabilities to use external temporary files for some of it's functions, even though I couldn't really find more onto it.

  



  What I want to do :

  



  So is there any way that I can make ffmpeg remove those extra streams and them replace the original file somehow. I'll also be needing to use this to multiple file, by I don't think this would be a big issue...

  



  I really need this to be done with ffmpeg, as learning the tool to it's full extent is a long-therm goal of mine and I want to keep working on that curve, but as for batch/cmd, I prefer it because I haven't properly learned a programming language yet (even if I often meddle with a few), but I would be happy to use suggestions of any kind for handling ffmpeg !

  



  Thank you !