Pel google video:
- Audio AAC, 44100 Hz, 2 ch, s16le, 125.6 kbit/8.90% (ratio: 15702->176400)
- Video: x264, 320x240, 380kbps ?

Scaler:
-vf scale=320:240 -sws 9

Audio:
-oac mp3lame -lameopts preset=128

Video:
-ovc x264 -x264encopts bitrate=380:subq=4:bframes=4:b_pyramid:weight_b:pass=1:psnr:turbo=1

Tot:
mencoder -vf scale=320:240 -sws 9 -oac mp3lame -lameopts preset=128 -ovc x264 -x264encopts bitrate=380:subq=4:bframes=4:b_pyramid:weight_b:pass=1:psnr:turbo=1 -o out.avi file.avi