I have a file that Vegas doesn't seem to read. The audio comes up fine, but there's no video. I've used GSpot to find out what codec it is, and it says it's "S-Mpeg 4 Version 2" and reports that I have two compatible codecs installed: Microsoft MPEG-4 and Corona MPEG4 Decoder DMO.
Does anyone have any ideas on how I can get this to work in Vegas?