[MPlayer-users] Vbitrate not responding on lavc encoding

[Rich Felker]

On Tue, Jul 12, 2005 at 11:44:09PM -0500, cothrige wrote:
> I recently reinstalled mplayer when I changed my system (Slackware
> 10.0 > Gentoo) and I have not been able to get mencoder to work
> properly.  This is with an emerged mplayer and one I compiled myself
> directly.  The results are identical with both. 
> 
> On a normal dvd I usually encode it with the following (excepting strange
> things like interlacing and so on):
> 
> "mencoder dvd://1 -noodml -ofps 23.976 -oac mp3lame -ovc lavc -lavcopts

24000/1001. 23.976 is incorrect.

> vcodec=mpeg4:mbd=2:vbitrate=1800:keyint=150 -o movie.avi"
> 
> This has generally given me a consistent result and a file 99% of the
> time perfect for splitting between two cds and yet quite watchable.
> Something around 1400Mb is typical, give or take fifty.  However, now
> I get nothing of the sort.  Everything is about 900Mb.  

if the file is smaller than the requested size, it simply means lavc
could not use the requested number of bits within the constraints you
specified. perhaps lower the minimum quantizer to 1. also you really
should always use 2pass mode. 1pass will give very low quality.

rich