[FFmpeg-user] pcm in mp4

Robert Krüger krueger at lesspain.de
Mon Mar 21 18:32:13 CET 2016

On Mon, Mar 21, 2016 at 4:59 PM, Moritz Barsnick <barsnick at gmx.net> wrote:

> On Mon, Mar 21, 2016 at 15:59:04 +0100, Robert Krüger wrote:
> > the mp4 muxer currently does not accept pcm in mp4. However, there are
> > several cameras out there, that produce such files. Would it be possible
> to
> > support this option when using -strict -2?
> If the cameras are doing it wrong, why would *you* want to do so as
> well?
> > This way a user could create non-spec-conformant files but it would
> > not happen, when not explicitly overriding the default. Is this not
> > the way this is handled in other places?
> I can't speak for the MP4 standard, but if it's not defined, ffmpeg
> would have to define a (non-spec-conformant) way to do this, or imitate
> some other format, like that of your camera.
> But again, why would you want to do this? Which client needs this?
> Perhaps the QuickTime (mov) container could be an option for you, it is
> very similar to the mp4 container. (mp4 was indeed derived from
> QuickTime.) It all depends on what you are trying to achieve.
you're of course right. I can work with mov instead and that's what I do. I
was just asking, if there was an easy fix to not deal with the case that
someone rewraps footage, extracting a subclip and not being able to use the
same format as the input format. not terribly important, though.

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