[Ffmpeg-devel] global headers
Sun Mar 19 14:51:39 CET 2006
On Sun, Mar 19, 2006 at 01:33:58PM +0000, M?ns Rullg?rd wrote:
> Michael Niedermayer <michaelni at gmx.at> writes:
> > Hi
> > On Sun, Mar 19, 2006 at 12:05:22AM +0000, M?ns Rullg?rd wrote:
> >> Michael Niedermayer <michaelni at gmx.at> writes:
> >> > could we use the same format and convert the global one in the mov/mp4
> >> > (de)muxer?
> >> We're doing the opposite right now. I don't like this, since
> >> whichever way it's done, several muxers will need to do the
> >> conversion. E.g. ADTS format is required for raw ADTS, MPEG-TS and
> >> MPEG-PS. MP4 requires the other format. Matroska, as is to be
> >> expected, uses it's own bastardized variant.
> > fine, so what do you suggest? demuxer -> muxer must work even if the
> > AAC variants differ ...
> > so if a demuxer has ADTS internally what should be done, remove ADTS
> > headers in the demuxer? in a middle layer? or the muxer?
> > should it be optional or always be removed?
> > always will break if the headers change (switching channels, movies, ...)
> > allowed or not it will happen and must be supported
> To me, the cleanest solution would be a middle layer for transforming
> between the different formats. Doing it in the demuxer or muxer will
> inevitably lead to the same work being done in multiple places.
fine, do you volunteer to implement it?
> Could we perhaps use AVCodecContext.sub_id here?
hmm, maybe but somehow i think its not a good idea
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