WMV audio question

Sir Headless VII

I have a wmv video clip and i would like to change the audio from 5.1 to stereo. I don't want to change the video at all but i cant get the 5.1 audio to play on my ps3 so i would like to convert it to stereo. MKV2VOB does this very quickly and easily with mkv files but doesn't support wmv. Anyone have any ideas?

aperlscript

My experience with transcoding is pretty limited, but I'd imagine you could do this with ffmpeg. I'd recommend this howto guide to get started. You can get a Windows binary of ffmpeg from sourceforge here.

As an example of using ffmpeg, straight out of the howto, here's an example command line for converting the audio stream inside a file from mp3 to mp2:

ffmpeg -i kitty.flv -target ntsc-dvd -b 2000k -acodec mp2 -ar 22050 -ab 64k -aspect 4:3 kitty2.mpg

You'd primarily be interested in the switches that start with "-a", which pertain to audio. Read about those in the audio options. The above command does some video-related stuff that doesn't apply.

As a good starting point, just download ffmpeg, and run "ffmpeg -i YourFile.wmv", and you'll see some useful spew about the audio/video encoding used in your file.

Sir Headless VII

I am having trouble redoing the audio with ffmpeg, the codec it is encoded with wont seem to extract. It shows up as "Stream #0.0: Audio: 0x0162, 48000 Hz, 5:1, 640 kb/s". Is there someplace i can get something that would support that format?

aperlscript

Googling that code leads to a post somewhere that says it's the "wmapro" codec, which isn't in ffmpeg yet. Try mencoder instead, which has a similar command line:

mencoder infile.wmv -o outfile.avi -ovc copy -oac mp3lame

Sir Headless VII

That does work but it gives an output that has the audio out of sync. I did manage to get the audio separated but even then when i try to recombine it with ffmpeg the audio is also out of sync. Is there a good way to fix that?

TheRealBadger

Have you tried using Super? I find it's usually pretty great at this sort of thing

Sir Headless VII

I tried super and it also puts the audio out of sync. I also tried manually delaying the audio using ffmpeg and it doesn't seem to work, even a large offset (18 sec) doesn't seem to change the out of sync audio.