I'm having big problems with converting any type of file to Mpeg 1 or Mpeg 2. The video will convert alright but when it is opened there has been no audio conversion. I've tried files on someone elses computer and it works fine there so I don't know what the problem could be. Is there a possibility that I haven't got certain codecs? or could my sound card just be rubbish? Any help would be hugely appreciated.