[MPlayer-users] Libavcodec bitrate error

[Arpi]

Hi,

> I've encoded several movies with the following settings:
> 
> mencoder -ovc avc -lavcopts
> vcodec=mpeg4:vbitrate=1300:vhq:vqmin=3:vqmax=12:\
> vmax_b_frames=0:keyint=250:vqdiff=3
> -sws 2 -sid 0 -vop scale=640:512 -pp 0x20000 
> -oac mp3lame -lameopts abr:br=160:q=2 -o frameno.avi 
> -dvd 1
> 
> But the final video bitrate is only around 650! I've also tried with 1600
> which resultet in a bitrate of 900. What am I doing wrong?

you set up too strict constraints over qscale, so bitrate control has no
chance to keep rate on the requested value.
remove/increase vqdiff=3 and vqmax=12, and change vqmin=3 to vqmin=2


A'rpi / Astral & ESP-team

--
Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu