[Ffmpeg-devel] ratecontrol advice

[Luca Zappella]

On Sat, 2005-08-13 at 11:33 -0300, Dario Andrade wrote:
> > 
> > My other settings are set dynamically but tend to be like this:
> >          gop_size =  60
> >          bit_rate = 118000
> >          time_base.num = 1
> >          time_base.den = 30
> >          bit_rate_tolerance = 118000/5
> >          qmin = 3
> >          qmax = 10
> >          mb_lmin = FF_QP2LAMBDA * qmin
> >          mb_lmax = FF_QP2LAMBDA * qmax

Hi,
I am facing with the same problems (even if I am using MPEG4 encoder).
These are the parameters I am using:

c->width = 640;  
c->height = 480;
c->frame_rate = 3;  
c->frame_rate_base= 1;
c->gop_size = 6; 
c->bit_rate = 128*1024; //512*1024  //1024*1024;
c->bit_rate_tolerance =  c->bit_rate * 20 / 100;
c->flags |= CODEC_FLAG_AC_PRED; 
c->flags |= CODEC_FLAG_4MV;
c->flags |= CODEC_FLAG_PART;

And the video I obtain is really chopped when motion happens.

Maybe there are other parameters I have to set? 
I have tryed to use also qmin and qmax but almost nothing has changed.

If someone could help me I would be glad.
Cheers,
Luca