Help with Conversion

Hi everyone.

I’m trying to get video I took on my Sony digital camera to play on my PSP.

There are some videos on the PSP memory stick that are working and when I look at them through my computer it says they are “MPEG-4 Movie”. The ones that aren’t working are labeled “MPEG-4 Video File”

To me, there is no difference here. But, obviously, something’s wrong. If you guys could help me out on converting the files, I’d appreciate it. Thanks.

Or, perhaps I’m just crazy and it will work? I don’t have the PSP with me so I can’t test it out.

Also, the picture associate with each file is different. The ones that work have a Quick Time picture and the ones I don’t think are working have an iTunes picture

Thanks in advance for your help!