[MPlayer-dev-eng] Lots of stuff for NUT

Rich Felker dalias at aerifal.cx
Tue Jan 10 05:57:17 CET 2006


On Tue, Jan 10, 2006 at 06:11:22AM +0200, Oded Shimon wrote:
> > > well, but your pts per stream method fails for closed GOP mpeg1/2/... files
> > > too ...
> > > for example:
> > > 
> > > pts: 1423756A89DBC
> > > dts: 0123456789ABC
> > >      IPBBPBBIBBPBB
> > 
  [...]
> 
> I didn't quite understand what you mean here, but I'd like to note that 
> with per stream pts and ptr, a seek to pts will give the first keyframe, 
> not the second. Because the second keyframe has pts A, which is higher than 
> 9...
> back_ptr always points to the last keyframe, pts is the pts of that 
> keyframe. (for the entire duration of a GOP, all syncpoints will have the 
> same pts)

Yes, this is what Michael said. He was pointing out that if we want to
decode frame B8 in this example we don't need I0, just IA.

Rich




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