Playing "Video Clips" - dodgy sound

I have a number of “video clips” that i want to play on xbmx/apple tv - when i play them the video is fine however the sound is all crackly and there is no sound form the actual movie. is there a plug in to fix this? i have tried to play the ‘video clip’ on the laptop with windows media player and it comes up saying error downloading codec, however with VLC media player it works fine…

i can play all other files (xcept NFO file compliations - any suggestions would be great, same problem) but these ones that are shown as ‘video clip’ in properties.

any suggestions?

thanks guys n gals