[MPlayer-users] Dumping specific audio stream from a DVD

[Alexander Roalter]

petesea at bigfoot.com wrote:
> Is it possible to dump the video and only a specific audio stream from a 
> DVD?
> 
> I've used the following to dump a title from a DVD and it works fine, 
> except it always dumps all the audio streams:
> 
>    mplayer dvd://1 -dumpstream -dumpfile movie.vob
> 
> What I'd like to do is this, but it doesn't seem to work:
> 
>    mplayer dvd://1 -alang en -dumpstream -dumpfile movie.vob
> 
> or in some cases, something like this, but it doesn't work either:
> 
>    mplayer dvd://1 -aid 131 -dumpstream -dumpfile movie.vob
> 
> Here's example output from this last one, which was run on a MacBook Pro 
> (OS X 10.5.2):
> 
-dumpstream always dumps the entire stream, including all audio channels.

There is (or was) a -dumpaudio variant, which I'm not sure does what you 
want, but your best shot is to dump the entire stream and later extract 
the audio:
mplayer stream.dump -aid 131 -ao pcm

creates an audiofile.wav file. If you have enabled -channels 6, it is a 
6-channel wav file

Or, you can use from the transcode project the tcextract tool:

tcextract -i stream.dump -x ac3 -t vob -a 131 > audio.ac3

which extracts the AC3-Stream from the file with id 131. MPlayer can 
play back this ac3 stream with no problems.

-- 
cheers,
Alex