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• FFMPEG : burn SRT files to a transparent video file ?

  19 septembre 2017, par Taapo

  I need to create several versions of srt/ssa subtitles for another editor. To minimize the problems that can rise (encoding, etc) I want to provide a separate AVI file that can be overlayed onto another file.

  So I would like to use FFMPEG to burn an "empty" (transparent) video file which has the length of the subtitle file, and with the subtitles burnt in. How would this be done in FFMPEG ?

  Before someone says this is a bad idea (which someone already did), there are use cases where this technique would be helpful. I’m fully aware that this would create big files, but most real-life editors don’t care about size - but about solutions. Judging from other posts (on other forums) there seem to be a need for others as well. And since a professional subtitler like Lemony Subtitler is offering the option, I suppose this is not really a bad idea.

• lavf/bink : fix latest header and add all existing revisions

  18 août 2017, par bnnm

  lavf/bink : fix latest header and add all existing revisions
  KB2 'i' found in Life is Strange (Xbox 360), rest verified against binkconv.exe
  Signed-off-by : bnnm <bananaman255@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/bink.c

• cinepakenc : fixes and improvements

  27 juin 2017, par addr-see-the-website@aetey.se

  cinepakenc : fixes and improvements
  version 2013-02-08 Rl
  
   fixes/optimization in multistrip encoding and codebook size choice,
  
    quality/bitrate is now better than that of the binary proprietary encoder
  version 2013-02-12 Rl
  
   separated codebook training sets, avoided the transfer of wasted bytes,
  
    which yields both better quality and smaller files
  
   now using the correct colorspace (TODO : move conversion to libswscale)
  version 2013-02-14 Rl "Valentine’s Day" version :
  
   made strip division more robust
  
   minimized bruteforcing the number of strips,
  
    (costs some R/D but speeds up compession a lot), the heuristic
  
    assumption is that score as a function of the number of strips has
  
    one wide minimum which moves slowly, of course not fully true
  
   simplified codebook generation,
  
    the old code was meant for other optimizations than we actually do
  
   optimized the codebook generation / error estimation for MODE_MC
  version 2013-04-28 Rl
  
   bugfixed codebook optimization logic
  version 2014-01-20 Rl
  
   made the encoder compatible with vintage decoders
  
    and added some yet unused code for possible future
  
    incremental codebook updates
  
   fixed a small memory leak
  version 2014-01-21 Rl
  
   believe it or not, now we get even smaller files, with better quality
  
    (which means I missed an optimization earlier :)
  Signed-off-by : Diego Biurrun <diego@biurrun.de>
  

  • [DBH] libavcodec/cinepakenc.c