[Ffmpeg-cvslog] CVS: ffmpeg/libavcodec mpegvideo.c,1.498,1.499

[Michael Niedermayer]

Hi

On Sun, Dec 25, 2005 at 10:28:23PM +0100, Guillaume POIRIER wrote:
> Hi,
> 
> On 12/25/05, Michael Niedermayer <michaelni at gmx.at> wrote:
> > Hi
> >
> > On Sun, Dec 25, 2005 at 08:53:00PM +0100, Guillaume POIRIER wrote:
> > > Hi,
> > >
> > > On 12/25/05, Michael Niedermayer CVS <michael at mplayerhq.hu> wrote:
> > > > Update of /cvsroot/ffmpeg/ffmpeg/libavcodec
> > > > In directory mail:/var2/tmp/cvs-serv28677
> > > >
> > > > Modified Files:
> > > >         mpegvideo.c
> > > > Log Message:
> > > > b frame strategy 2
> > >
> > > How should I update the man page with?
> > >
> > > vb_strategy=2: uses an adaptive number of B-frames
> > >
> > > Smth like that? Is that option supposed to have an impact on encoding
> > > speed (compared to 0 or 1)?
> >
> > 2 is slow, and more or less optimal, speed and quality can be tuned with
> > -brd_scale and -vmax_b_frames
> > speed should increase by a factor of 4 every time brd_scale is increased by 1
> 
> Ok thanks, I'm gonna commit a manpage update shortly with your tips.
> However, I have one more question: does vb_strategy still only works
> during the first pass?

yes, the 2nd pass always uses the decissions from the first

[...]
-- 
Michael