Re: [Linphone-developers] question on video encode

[Simon Morlat]

Hi,

This is empiric tuning to avoid bitrate peaks above maximum bandwidth.
c->bit_rate is a mean bitrate.
When doing real-time encoding, rate control cannot be deterministic.
As bitrate peaks are disastrous for user experience (ugly video frames, slowing down), this 0.7 factor try to make this to never happen.

Simon

Le Thursday 14 May 2009 09:55:28 fengbin, vous avez écrit :
> Hi,
>
> I have a question on video encode in videoenc.c and function prepare()
>
> c->bit_rate=(float)s->maxbr*0.7;
>
> Why 0.7 is multiplex with maxbr ?
>
> Thanks
>
> BR