[Ffmpeg-devel] [patch] rc buffer bits reservation for I-frames
Fri Nov 24 17:32:23 CET 2006
On 11/24/06, Guillaume POIRIER <poirierg at gmail.com> wrote:
> On 11/24/06, Jindrich Makovicka <makovick at gmail.com> wrote:
> > On 11/24/06, Guillaume Poirier <gpoirier at mplayerhq.hu> wrote:
> > > Maybe I'm not getting the point, but wouldn't it be better to fix
> > > whatever is wrong with the RC decisions at tight bitrate constrains
> > > rather than adding "yet another custom-fitted option" ?
> > I am not sure how to do this 100% properly. You probably would have to
> > buffer all the frames up to the next scene change, encode the
> > following I-frame and then encode the previous I/B frames. But using
> > the size of the previous I-frame works quite well.
> How come 2-pass can't help here? The way I understand 2-pass, is that
> it's a way given to the codec to "see the future".
> 2-pass should give you a rough estimate that allows you to make do
> without buffering at all, can't it?
Yes, but it won't help when you encode in realtime :)
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