[MEncoder-users] RE: Negative bitrate?

Dave Puryear DaveP at aebn.net
Tue Aug 15 17:33:22 CEST 2006

Win2000 Pro
Mplayer 1.0pre8-3.4.2

Trying to replicate NTSC MPEG-2 encoding parameters from Digital Rapids'
Stream software...
Constant video bitrate of 4000 kbps, mp2 audio @ 128

for %%D in (%VOBS%\%FILE%*.vob) do if not exist %MPEG%\%%~nD.mpg
mencoder %VOBS%\%%~nD.vob -af volnorm -mc 0 -oac lavc -ovc lavc -of mpeg
-mpegopts format=dvd:tsaf:vbitrate=4000:muxrate=4200 -vf
crop=%cropSettings%,pp=lb/al,scale=720:480,harddup -lavcopts
rate=4000:vpsize=2048:keyint=18:acodec=mp2:abitrate=128:autoaspect -o

Pos:xxxx.xs xxxxxxf (0%) 36.53fps Trem: 0min  0mb  A-V:0.000 [-3006:128]

Resulting MPEG-2 file plays fine, but still curious about the negative
bitrate.  Any ideas?

I'm also looking for ways to encode at more than 36 or 37fps.  Do I have
the right options in the right order?  Any advice is welcome.

Dave P.

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