Mencoder - Examples.

//Xvid, 320:240 size.
mencoder input.avi -o output.avi \
-ovc xvid -xvidencopts bitrate=750 -ofps 24 -vf scale=320:240 \
-oac mp3lame -lameopts abr:br=160:vol=2

//Fixed Quality
mencoder input.avi -o output.avi \
-ovc xvid -xvidencopts fixed_quant=2 \
-oac mp3lame -lameopts abr:br=160:vol=2 \


//FLV
mencoder input.avi -o output.flv -of lavf \
-oac mp3lame -lameopts abr:br=56 -srate 22050 -ovc lavc \
-lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3

//Simple lavf codec.
mencoder input.avi -o output.avi -of lavf \
-ovc lavc -lavcopts vcodec=msmpeg4 \
-oac pcm \

//another example.
mencoder input.avi -o output.avi \
-of lavf \
-ovc lavc -lavcopts vcodec=wmv2 \
-oac mp3lame -lameopts abr:br=56 -srate 22050