I need to extract the audio stream from a movie and eventually convert it to a certain format, let's say MP3 at 192 kbps, for later processing, more exactly to detect the voices.
Are there any libraries for extracting the audio stream from a movie?
you could use mplayer to extract audio to a seperate file:
mplayer yourmovie.mov -vo null -vc null -ao pcm:fast
Assuming you have a DVD it can be as simple as stripping the audio track, which you can do with various bits of DVD ripping software. It it has a standard Dolby Digital audio track (up to 48kHz 16bit) or possibly TrueHD in the case of Blu-Ray (up to 96kHz, 24bit) you should be able to decode either using either mplayer or ffmpeg .
If it's Java you're interested in check out FMJ:
This provides a Java wrapper to ffmpeg.
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