I have always been able to import mp4 files into elements 4.0. I just installed the program to a new computer and no longer can it says the files are damaged or unreadable. What do i do? i just downloaded the new quicktime, so should i re instal the program will that help?
Well, it depends on the hardware that produced that MP4 and what codecs it's using -- and which codecs are installed on your new computer. And possibly if your computer uses Windows 7 32-bit or 64-bit.
You can try installing that camera or camcorder's software and see if that makes a difference. It may not.
Premiere Elements does not work consistently with MP4s unless they're from a Flip Mino or Ultra camcorder.