ibleedspeed said:
5 exported from vegas as lagarith avi 720x480 dar=3:2 par=1.2121
This makes no sense, and is probably your problem. 720x480 will only have a DAR of 3:2 if the pixel aspect ratio is 1. 720x480 with a PAR of 1.2121 is 16:9. You're confusing the encoder.