I shot 150 XDCAM EX 720p mp4 video clips all from the same Cisco Flip Cam. I opened them in Premiere Pro CS4 using the XDCAM EX 720p setting. About half have audio. When I play them in Quicktime Player, they all have audio. What gives?
Show everyone the details of one good and one bad file
Report back with the codec details of your file, use the programs below... a screen shot works well to SHOW people what you are doing