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• node.js live streaming ffmpeg stdout to res

  24 mai 2014, par blasteye

  I want node.js to convert an extremly long audio file to mp3, and the second data is available on stdout, node.js should send it to the client for them to play.

  I’ve written the following, and while it works, the html5 audio/video tag waits until ffmpeg is 100% done transcoding, where-as I want to start playing the video while ffmpeg is doing its thing.

  var ffmpeg = childProcess.spawn('ffmpeg', [
  
     '-i', params.location, //location of the specified media file
  
     '-f', 'mp3',
  
     'pipe:1'
  
   ]);
  
   res.writeHead(200, {
  
     'Content-Type': 'audio/mp3'
  
   });
  
   ffmpeg.stdout.pipe(res);

  EDIT 1 : Not sure why, but if params.location points to a movie everything seems to work. But if its an audio file, ffmpeg doesn’t seem to be outputting to stdout until its 100% converted.

  EDIT 2 : Turns out that you can’t dump an mp4 file to stdout due to the fact that mp4 files are non Causal (http://en.wikipedia.org/wiki/Causal_system). THerefore if you use webm it works. Just make sure to compile ffmpeg with webm support (for homebrew users : brew install ffmpeg —with-vpx —with-vorbis ).

  I’ve uploaded a github gist showing two functions to send live mp3/webm transcodes : https://gist.github.com/cobookman/c1a9856a4588496b021a

• libavformat : fix spelling in ID3v1 genres and extend the list of Winamp extensions.

  19 décembre 2019, par Ulrich Spörlein

  libavformat : fix spelling in ID3v1 genres and extend the list of Winamp extensions.
  Sources include various lists on the Internet, as well as the current
  
  Wikipedia page at
  
  https://en.wikipedia.org/w/index.php?title=List_of_ID3v1_Genres&oldid=896774343
  
  but most importantly the list as used by taglib at
  
  https://github.com/taglib/taglib/commit/3e60e339a4bc46e2a1a7aea782502480561a8acf#diff-f86455366624350770f41b4940925dde
  Further patches to harmonize the spelling have been sent to taglib and
  
  libid3tag. See also https://github.com/taglib/taglib/pull/942/
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/id3v1.c
  • [DH] libavformat/id3v1.h

• AMV video encoder ?

  15 novembre 2011, par Shimmy

  I'm looking for a converter that can encode input files to amv format output.

  I've found this project, but it looks somewhat outdated and not maintained.
  Do you know of a solid and reliable amv encoder (any API or tool that can be invoked from .NET), or can you recommend on the one I mentioned ?