[MPlayer-dev-eng] Re: divx2svcd-0.5.1

[Michael Niedermayer]

Hi

On Monday 26 April 2004 21:45, Nico Sabbi wrote:
> Michael Niedermayer wrote:
> >Hi
> >
> >On Monday 26 April 2004 21:10, Nico Sabbi wrote:
> >>Andriy N. Gritsenko wrote:
> >>>   Hi, Nico Sabbi!
> >>>
> >>>Sometime (on Monday, April 26 at 19:49) I've received something...
> >>>
> >>>>>>b) it video is mpeg2 it would be nice to set  correctly the
> >>>>>> mpeg1_mpeg2 bit, to make some programs like replex happy
> >>>>>
> >>>>> This may be good thing. Another thing may be changing default stream
> >>>>>rate if stream is mpeg2.
> >>>>
> >>>>yes, and maybe disabling those  rate compliance flags in the system
> >>>>header
> >>>
> >>>   Which ones exactly?
> >>
> >>CSPS, packet_rate_restriction, system_video_lock, pstd_buffer_size_bound
> >>maybe no programs ever uses these fields, but setting them correctly
> >>(considering
> >>that lavc doesn't follow any bitrate/buffer constraint)  doesn't hurt
> >
> >lavc tries to follow what u specify, see TFM, allthough lavc is not
> > perfect at CBR, and CBR is not default
> >
> >btw, improving CBR and ratecontrol in lavc is near the top of my todo list
> >
> >[...]
>
> mine is not a critic: I like lavc, I use it everyday for archiving;
> (setting vqmin=l:min=1 and
> vqmax=4 often averages to 2Mb/s,
> and the quality is really very good encoding to mpeg2 if the source is
> clean).
> BTW there are problems with buffer underruns when you set vbv=1835.
yes, thats why i said "not perfect"

>
> If you need I'll prepare some test clip when I have some time.
not needed ATM, only if the rc changes which i hopefully work on soon dont 
help ...

[...]
-- 
Michael
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