[FFmpeg-user] Copy Audio

Kieran O Leary kieran.o.leary at gmail.com
Wed Dec 26 11:25:13 EET 2018

On Wed, 26 Dec 2018, 09:17 Gyan <ffmpeg at gyani.pro wrote:

> On Wed, Dec 19, 2018 at 10:28 AM Moritz Barsnick <barsnick at gmx.net> wrote:
> >> Why do you need to create the same/similar format that Sony and Canon
> >> do? Do you want the resulting MP4 to be read by a particular
> >> software? Why does the audio need to be copied losslessly? Why are
> >> the MOV or Matroska containers not alternatives?
> Most editing software don't read Matroska files. And if the container is
> MOV, non-Mac editors usually rely on antiquated 32-bit Quicktime to open
> the file, whereas they normally have native MP4 demuxers. And some
> editors don't skip the priming sample in AAC/MP3 streams causing a
> desync - in which case PCM is preferable.

Perhaps support could be added for these "illegal" streams if a user adds
the -strict -experimental flag? Or something similar? Where ffmpeg makes it
clear that these are non-standard files that will have interoperability
issues in future.



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