[Ffmpeg-devel] Ratecontrol problem

Thomas Parmegiani thomasp
Thu Oct 12 15:23:44 CEST 2006

I use the latest svn.
Even if I change bitrate tolerance to a higher value it does not work...
The only way I found to reach the desired bitrate is to change the frame
size to a lower resolution but I need to keep the original size.

Best Regards,


-----Message d'origine-----
De : ffmpeg-devel-bounces at mplayerhq.hu
[mailto:ffmpeg-devel-bounces at mplayerhq.hu]De la part de Michael
Envoye : jeudi 12 octobre 2006 15:14
A : FFmpeg development discussions and patches
Objet : Re: [Ffmpeg-devel] Ratecontrol problem


On Thu, Oct 12, 2006 at 02:51:36PM +0200, Thomas Parmegiani wrote:
> Hi all !
> I have some problems to reencode a MPEG2 file (IBP, 1920x1080, 30 Mbs) to
> 15 Mbs I only
> file (I only is important as I need it).
> At the moment my main problem is not the quality but the target bitrate. I
> get too many rc buffer underflow warnings ! Can anyone help me about my
> problem ?

first use latest svn

> Here is the command line I use : ./ffmpeg -i /e/test.ts -b
15000000 -minrate
> 15000000 -maxrate 15000000 -bt 1 -bufsize 1500000 -intra /e/test2.ts

-bt 1 is significantly too small

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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