[FFmpeg-devel] [PATCH v5 1/4 v7] lavf/avienc: Add support for palette side data

Michael Niedermayer michael at niedermayer.cc
Sat Mar 5 18:14:57 CET 2016

On Sat, Mar 05, 2016 at 05:54:05PM +0100, Reimar Döffinger wrote:
> On Sat, Mar 05, 2016 at 02:32:56PM +0100, Mats Peterson wrote:
> > On 03/05/2016 02:24 PM, Mats Peterson wrote:
> > >
> > >The original toon.avi doesn't contain xxpc chunks at keyframes either,
> > >if that can be of any comfort. It only contains two xxpc chunks, at
> > >that. If you're able to invent something nice regarding palette changes
> > >on keyframes, please go ahead. But please add what's available in the
> > >meantime.
> > >
> > >Mats
> > >
> > 
> > In my book it should be up to the demuxer/decoder to keep track of previous
> > palettes. You said yourself that no xxpc chunks should be included if they
> > are identical to the first palette.
> Define "previous".
> What you suggests means that for a 1 GB video, if you want to see the
> only the last frame the demuxer would _always_ have to parse the whole 1GB
> just to make sure it has the last palette.
> Thus the desire to always have a complete palette included for
> "keyframes", which exist exactly so you can start playing
> without parsing the whole file first.
> Obviously patches don't have to solve every problem from the start,
> but then again half the time to revise them faster than anyone can check
> them...

> Btw. sorry, maybe Michael manages, but I at least won't be able to
> even read, much less properly follow all your emails if you
> write that many.

same problem here
ive applied the latest now, as i think its less work to build on top
of that and fix what remains ...

> So either you have to slow down or wait a bit longer for us
> to manage to (find the right version of) and apply patches...
> Regards,
> Reimar
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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Why not whip the teacher when the pupil misbehaves? -- Diogenes of Sinope
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