[Ffmpeg-devel] size of encoded file not continous parameter of 'vqscale'
Fri Jun 9 20:39:05 CEST 2006
On Fri, Jun 09, 2006 at 09:07:19AM -0500, Jeff Clagg wrote:
> On Fri, Jun 09, 2006 at 01:02:09PM +0200, Darko Veberic wrote:
> > hi,
> > i am usually encoding video with the following mencoder options:
> > -lavcopts vcodec=mpeg4:vqscale=$vq:vhq:v4mv:trell:autoaspect:threads=4
> This isn't what you asked, but vhq isn't a good idea. Replace it with
> mbd=2, and you will get better quality for a neglible speed difference.
> I've actually seen a case where vhq was twice as slow as mbd=0, but vhq
> gave slightly worse quality.
> Also, threads=4 is only useful if you have around 4 CPUs.
Or 4 cores. Or 4 SMT capable Vcpus. It all depends, you know.
> And it causes a large reduction in quality.
Care to elaborate ?
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