[MPlayer-users] Re: mencoder with lavc, mpeg4, vbitrate=1250 producing 3GB/h files

[Rémi Guyomarch]

On Sat, Aug 10, 2002 at 06:29:27PM -0400, Brian J. Murrell wrote:
> I was in the past using mecoder to transcode 5Mb/s mpeg1 files to
> 1.250Mb/s mpeg4 files, with success.  I had a script to do it and it
> worked every time.  The same script is now producing 3GB/h files on a
> particular source mpeg1 file, even with the vbitrate set to 1250.
> Here is the complete command line I have been using:
> 
> $ mencoder -pass 1 -ovc lavc \
             ^^^^^^^            
            not useful       

> -lavcopts vcoded=mpeg4:vbitrate=1250:vme=5:vqmin=2:vratetol=40000 -o file.avi file.mpeg
            ^^^^^^                     ^^^^^
            typo ?                 are you sure ?
...
> I have another file I just tried that probably has much less noise and
> it was transcoding at 830MB/h or so.

Btw, 1250 Kbits/s will give you :
1250/8*1000*3600/1024/1024 ~= 536.4 MBytes / hour
With vratetol=40000 and 128KBits/s mp3 audio, it should give you
between 586 MBytes/h and 596 MBytes/h. Add to that the .avi overhead.

830 MBytes/h is already too much.

Are you sure you have the latest (CVS) mplayer/mencoder *and*
libavcodec ?

-- 
Rémi