On 13/04/12 06:14, Andrey Utkin wrote:
> Hi. I encounter problems with flv encoder at desired bitrate.
> Both ffmpeg.org and libav.org behave in same way.
> It gives 'rc buffer underflow' warnings (more times on high-motion input 
> video).
> Visually, it manifests as remarkable picture quality degradation after
> such message is produced.
> Is this really a bug, or my misuse of parameters? If it's a bug, is it
> known, and how can i help fixing it?

If you have it using higher bitrate does it work better? If you set the
buffer to have a min and a max about a 10% the desired bitrate, does it
work better?

The ratecontrol isn't omniscient so it is expected to fail with
impossible constraints.


lu

-- 

Luca Barbato
Gentoo/linux
http://dev.gentoo.org/~lu_zero

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