[FFmpeg-devel] [PATCH] VC-1 SP/MP test bitstreams demuxer

[Michael Niedermayer]

On Sun, Jan 27, 2008 at 03:47:34PM +0200, Kostya wrote:
> On Sun, Jan 27, 2008 at 12:57:50PM +0100, Michael Niedermayer wrote:
> > On Sun, Jan 27, 2008 at 10:19:54AM +0200, Kostya wrote:
> > [...]
> > 
> > > 
> > > > > +    if(av_get_packet(pb, pkt, frame_size) < 0)
> > > > > +        return AVERROR(EIO);
> > > > > +    pkt->flags |= keyframe ? PKT_FLAG_KEY : 0;
> > > > > +
> > > > > +    return pkt->size;
> > > > > +}
> > > > > +
> > > > > +AVInputFormat vc1t_demuxer = {
> > > > > +    "vc1test",
> > > > > +    "VC1 test bitstream format",
> > > > > +    0,
> > > > > +    vc1t_probe,
> > > > > +    vc1t_read_header,
> > > > > +    vc1t_read_packet,
> > > > > +};
> > > > 
> > > > does seeking work?
> > > > if no try setting AVFMT_GENERIC_INDEX and try again
> > > > if still not, check if the generic code builds the index properly
> > > > and fix it, this should be just a 1 or 2 line fix in utils.c
> > > 
> > > It won't work as index is built only for parsed formats.
> > 
> > yes, i meant you could fix that :)
> > though thats of course independant of this patch ...
> 
> You could as well ;)

yes i could ... ;)
but its always better if someone else does the work :))))


> Here's an untested proof of concept

ok if it works and is tested :)


>  
> > [...]
> > > +    if(!s->streams[0]->r_frame_rate.num)
> > > +        pkt->pts = pts;
> > 
> > you are missusing r_frame_rate.num here
> > actually i dont see what would prevent lavf to set it to a non zero value
> > in av_find_stream_info() and then break this ...
> 
> How should I redo it then?

well
many ways
one would be to check if timebase.den == 1000

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No human being will ever know the Truth, for even if they happen to say it
by chance, they would not even known they had done so. -- Xenophanes
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