[MPlayer-users] advice on mencoder options

[Vladimir Mosgalin]

On Mon, 17 Nov 2003, D Richard Felker III wrote:

DRFI>> E.g. 640*480 resolution video at 25 frames per second at bitrate
DRFI>> 2000 kbit/s would be 2000000/(640*480*25) = 0.26042 bits per
DRFI>> pixel.
DRFI>
DRFI>Then your recommendation of 0.26 is insane. 640x480 video is fine
DRFI>with ~1100 kbit/sec from my experience. In fact constant qscale=2
DRFI>only gave me 1500 kbit/sec!! Of course if you have hideous noisy
DRFI>input from TV then you'll need more bits (or preferably you'll need
DRFI>to denoise), but for clean-source video, properly cropped, I expect
DRFI>2000 will always be overkill.

I've got 3.5-minute video coded from dvd, most of the scenes have _very_
fast motion. In 640x480, with bitrate 2000 average vq is higher than 3,
video looks quite good. With vq=2, average bitrate was over 3000, and
higher (4000 or so) in some moments. AFAIR quality with bitrage=1000 was
noticeable worse. Well, its size is 60m now, so it doesn't matter...

-- 

Vladimir