Tip extracting audio from video file
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There are few simple ways to extract audio from various types of video files (mpeg, avi, divx etc).
Use Mediainfo command line to find out the audio-stream information of the video file.
[edit] Using ffmpeg
ffmpeg -i video_file -f mp3 audio_file.mp3
In order to specify a different bit rate for your output file, use the -ab switch (in Kb/s).
ffmpeg -ab 192 -i video_file -f mp3 audio_file.mp3
[edit] Using mplayer
mplayer -dumpaudio -dumpfile audio_file.mp3 video.avi
That is, if the audio stream is in mp3 format. If it isn't, change extension appropriately.
