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• avcodec/mpeg12enc : Perform size/level/profile checks earlier

  6 avril 2021, par Andreas Rheinhardt

  avcodec/mpeg12enc : Perform size/level/profile checks earlier
  This has the advantage that one does not waste some allocations
  
  if one errors out because of these checks.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mpeg12enc.c

• lossless video to h.265 - [error] : main10 profile not compatible with i422 input chroma subsampling

  24 février 2021, par spierce7

  I have a lossless .mov video and I'm trying to encode using h.265 for firetv and some other android tv devices. The spec that they support is :

  


  Based on their native H.265 support, I'm trying to export a Main 10 Profile with level 4.1.

  


  The command I'm running is :

  


  ffmpeg -i 001_lossless.mov -c:v libx265 -preset slow -profile:v main10 -level:v 4.1 -c:a aac -b:a 128k output.mp4


  


  Which yields the following error :

  


  x265 [error]: main10 profile not compatible with i422 input chroma subsampling.


  


  What is the best way to work around this ? I can request the lossless video in different formats also, but I'm not exactly sure what to ask for.

  


• audio/mp4 ; codecs="mp4a.40.2" not playing in Chrome and Firefox

  19 octobre 2020, par Stefan Falk

  It seems I want to convert audios, which I want to stream on my website, to audio/mp4; codecs="mp4a.40.2".

  


  Using ffmpeg-cli-wrapper, I am converting my uploaded audio files with this command here :

  


  ffmpeg -i /tmp/input.any -acodec aac -b:a 256000 /tmp/output.aac


  


  On the client I am creating a SourceBuffer like this :

  


  this.sourceBuffer = this.mediaSource.addSourceBuffer('audio/mp4; codecs="mp4a.40.2"');


  


  The errors are :

  


  Chrome :

  


  NotSupportedError: Failed to load because no supported source was found.


  


  Firefox :

  


  NotSupportedError: The media resource indicated by the src attribute or assigned media provider object was not suitable.


  


  Here comes the fun part :

  


  If I create the SourceBuffer using audio/aac as mime-type :

  


  this.sourceBuffer = this.mediaSource.addSourceBuffer('audio/aac');


  


  the audio gets played correctly on Chrome but Firefox says :

  


  MediaSource.addSourceBuffer: Type not supported in MediaSource


  


  ---

  


  Update

  


  After changing the command to

  


  ffmpeg -i /tmp/input.any -acodec aac -b:a 256000 /tmp/output.mp4
                                                             ^^^ 


  


  Chrome/Firefox do not give an error when using audio/mp4; codecs="mp4a.40.2", but the audio is not being played.

  


  ---

  


  See

  


  

  • https://stackoverflow.com/a/64432478/826983