[FFmpeg-soc] [soc]: r1168 - rv40/rv40.c

[Kostya]

On Thu, Aug 23, 2007 at 08:11:09PM +0200, Michael Niedermayer wrote:
> Hi
> 
> On Thu, Aug 23, 2007 at 08:06:21PM +0300, Kostya wrote:
[...]
> > Can you give some hints on how to operate on slices gathered into one frame?
> > Setting avctx->slice_offset[] and avctx->slice_count in parser is impossible
> > because of race conditions.
> 
> the slice_offset/slice_count should be deprecated, it was bad design ...
> 
> the standard h.264/mpeg1/... way is that there is a startcode which does not
> occur anywhere in the bitstream so you just search for that if you need to
> know where the slices start, i guess that doesnt work with rv40 ...

Actually they have reserved some startcodes but not in this files :(
 
> the second simple solution is just to decode slice after slice if thats
> possible without knowing where the slices start and end

I do it this way now.
 
> the third solution is to make the demuxer (which knows where the slices
> start put this data in the returned packet, like
> 32bit length of first slice, 32bit length of second slice, ...
> (you know where the list ends from the fact that theres no space left)
> of course there are a million other possible solutions

Not if you limit them to the sane ones.  
 
> [...]
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB