I have download a lots Steven Chow movie (A to Z, total of 40GB), and I find out that some of the AVI files having problem with the audio, both cantonese and mandarin sound will come out from speaker no matter i switch it to right or left channel.

I would like to know what software can I use to throw away the mandarin audio files (chow movie will be highly downgraded if speak in any languages other than cantonese, right ?) and at the same time recompress the whole AVI files