[FFmpeg-devel] [PATCH] qtrleenc autogop

[Reimar Döffinger]

On Tue, Jun 23, 2009 at 02:16:24PM +0200, Michael Niedermayer wrote:
> On Tue, Jun 23, 2009 at 01:01:33PM +0200, Reimar D?ffinger wrote:
> > On Tue, Jun 23, 2009 at 12:51:44PM +0200, Michael Niedermayer wrote:
> > > On Mon, Jun 22, 2009 at 12:14:36PM -0700, Baptiste Coudurier wrote:
> > > > Michael Niedermayer wrote:
> > > > > On Sat, Jun 20, 2009 at 03:07:02PM -0700, Baptiste Coudurier wrote:
> > > > >> Hi guys,
> > > > >>
> > > > >> $subject. It should be more efficient,
> > > > > 
> > > > > it breaks seeking if iam not misreading the patch, one can only seek to
> > > > > keyframes and the patch would stop keyframes from being used except for
> > > > > the very first frame
> > > > 
> > > > File works perfectly with quicktime player ;)
> > > 
> > > quicktime can seek in files that have only a single keyframe by
> > > decoding all frames after the keyframe?
> > 
> > Yes, and it actually caches a few decoded frames AFAIK, so as long as
> > you seek only a little bit it seems okay.
> 
> i guess that would make a nice feature request for ffplay ...

Well, but there might be some additional codec state, so you can't use
the frames alone to reset the codec to some earlier state.
I should probably get myself more informed before I make any statements,
but I think that caching is mostly to enable frame-stepping backwards.