[Ffmpeg-devel] encoding quality

Michael Niedermayer michaelni
Mon Mar 20 22:45:54 CET 2006


On Mon, Mar 20, 2006 at 06:27:53PM +0100, Zoltan NAGY wrote:
> hello ppl!
> I'd like to ask your advices in an encoding matter.
> I have several files, which I'd like to encode into flv. They're in 
> different formats,
> but most likely wmv2 and wmv3.
> Currently I'm using mplayer:
> mencoder original.wmv -vf harddup -ofps 24 -oac mp3lame -ovc lavc 
> -lavcopts vcodec=ffv1:vstrict=-2 -o out.avi
> then ffmpeg to encode this out.avi into flv:
> ffmpeg -y -i out.avi -f flv -b 512 out_end.flv
> but the flv's quality really sucks. If I change the bitrate to 1024 or 
> 2048 or above,
> then it's ~fine, but the filesize gets bigger and bigger..
> what options could I tweak? I'd like to keep my file's sizes little, but 
> I wouldnt like to
> loss a lot quality..

2pass, trellis quant, 4mv, mbd=2, ...



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