[vlc-devel] isom ctts
davidf+nntp at woaf.net
Wed Oct 29 09:31:24 CET 2008
On 2008-10-29, Laurent Aimar <fenrir at via.ecp.fr> wrote:
> Of course not, that would be insane.
> You need to use edit list entry (edts/elst), simple and clean.
It requires you to know the offset again, which seems like more work
than if they got it right in the first place.
>> You *will* encounter mp4 files with signed sample_offset. From when i
>> last spoke to apple about it, there may be a move afoot to relax the
>> restriction in isom/mp4, because it is broken by design and causes
> Well having negative DTS strikes me as an ugly workaround to avoid
> edit list.
I personally don't see it as a big deal, everything happens with modulo
arithmetic, so there isn't really a concept of negative dts. see also
the case when the dts/pts wrap around in an mpeg2 es.
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