There is always a bit of audio dialogue you´d like to rip from videos, making this complete tool, All Video to Audio Converter 1.2.6, very useful. It lets you rip the audio from a wide range of video formats quickly and easily.
You can rip the sound from videos in AVI, MPG, MPEG, WMV, MP4, ASF, Quicktime (MOV and QT), 3GP, DAT, OGM, Real Media (RM and RMVB), FLV (Flash), etc, letting you save the resulting audio in varios sound formats like WAV, MP3, WMA, M4A ó AMR.
To work correctly the program needs you to previously install DirectX 8.1 or later, and if you don´t have it you can download it here:
Link.