[FFmpeg-devel] [PATCH] alac: allow extra data without the ATOM header

[Steve Lhomme]

On Mon, Feb 15, 2016 at 10:29 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Steve Lhomme <robux4 <at> videolabs.io> writes:
>
>> On Mon, Feb 15, 2016 at 10:23 AM, Carl Eugen Hoyos wrote:
>> > Steve Lhomme <robux4 <at> videolabs.io> writes:
>> >
>> >> >> I implemented the same change in VLC.
>> >> >
>> >> > From a quick look, you added code to the decoder
>> >> > wrapper but how is remuxing supposed to work?
>> >>
>> >> In VLC ? There's no Matroska muxer so it would use
>> >> the ffmpeg one.
>> >
>> > I mean remuxing to mov as mentioned in my first email.
>>
>> remuxing doesn't go through the decoder, so I don't
>> see how this is relevant.
>
> Allow me to repeat my original question:
> Is there a mov muxer in vlc that should allow remuxing
> from mkv to mov? If yes, does remuxing alac in mkv to
> mov with current vlc produces files that are playable

Yes there is a muxer and no without my fix in VLC it will not be correct.

> with FFmpeg (or QT)? If yes, how can I reproduce this?
> (I don't know the vlc command line to do it.)
> If not, this should be fixed (first) with a patch to
> the mkv demuxer in vlc (and will fix #16620).

I agree. I just find odd that every demuxer/muxer has to deal with the
unused header data while only MOV doesn't. But I guess the decision to
do it that way was settled a long time ago and cleaning this is
useless.

> Carl Eugen
>
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