[MEncoder-users] Converting wmv3 to flv

[Scott]

I'm trying to convert any number of random wmv3 files to flv.  This 
needs to work universally and quickly, so I'm being extra careful
to do this properly.  I've figured out how to convert a single audio
channel wmv3 to flv with this command:

mencoder movie.wmv -o movie.flv -of lavf -ovc lavc -oac lavc 
-lavcopts vcodec=flv:vbitrate=250:autoaspect:acodec=mp3:
abitrate=56 -vf scale=320:240 -srate 22050 
-af lavcresample=22050 -ofps 15

This works pretty well, but the audio is slightly out of sync with 
the video.

Another problem is I get a Segmentation Fault when the wmv3 file
has a 2 channel audio track.  I can convert the wmv3 *video* to flv 
by using -nosound, but I need the sound to be included.  If you 
have any insight into this, I'd be grateful.

I got around this by doing mplayer -ao pcm to create a dump and 
then I used lame to convert it to mp3.  Now my challenge is to 
remux this new audio track with the flv that was created with 
-nosound.  I read in another post here that I need to use 
-ovc copy -oac copy and -audiofile, but I can't seem to figure out 
how it's done.  mencoder went through the entire process but the 
mp3 wasn't added.  I used this command:

mencoder movie.flv -ovc copy -oac copy -audiofile audiodump.mp3
 -o movie2.flv

Something must be wrong with it.

So I've got three problems:

1. Audio is out of sync when I convert a 1ch wmv3 to flv
2. Segmentation Fault when I try to convert a 2ch wmv3 to flv
3. I can't remux the separate audio mp3 into a -nosound flv file.

Ideally I'd like to avoid using mplayer and lame as that adds too 
much time to the entire process.  I'd like this process to happen in 
a matter of a couple minutes at the most.  I think with mplayer I 
have to wait out the entire duration of the video to get the 
audiodump which is too long.

I'm using the wmv9dmod.dll file from the mplayer website to 
decode my wmv3 files.

Thank you,
- Scott