[thelist] mencoder or ffmpeg to convert .VOB to .flv

Bob Meetin bobm at dottedi.biz
Thu Nov 27 09:36:40 CST 2008

A year later I'm now starting to tackle some automation.  I have been 
using 'super' combined with flash video encoder to covert .VOB files to 
.flv format on my x-Win PC.  With my recently upgraded to Ubuntu Linux 
desktop I now have access to ffmpeg and mencoder to do command line 

I'm not much for video, just a dabbler who does what is necessary to get 
from point A to point B.  I could use a little advice with the correct 
arguments to get some reasonable quality for .flv files that will be 
displayed at 320x240px dimensions, preferably as conservatively sized 
(MB) as possible.

I found an ffmpeg examples which I cannot get to work at all for .vob to 

    % ffmpeg -i input.vob -f flv -vcodec flv -b 200k -r 25 -s 296x236 
-ab 64 -ar 44100 -ac 2 -acodec mp3 output.flv

It errors with:   "Unsupported codec for output stream #0.1".  For avi 
to flv or mpg the following work:

    % ffmpeg -i input.avi avi_to_flv.flv
    % ffmpeg -i input.avi -target pal-vcd avi_to_mpg.mpg

Second part of the question, reasonable middle of the road 
arguments/values for use with mencoder.  Here is what I tried and works 
but I'm not sure how reasonably optimal it is:

    % mencoder input.vob -of lavf -ovc lavc -lavcopts 
vcodec=flv:vbitrate=768 -ofps 25 -oac mp3lame -lameopts abr:br=32 -srate 
22050 -vf scale=320:240 -o output.flv


Bob Meetin

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