Working with mp4s from non-camcorder sources can sometimes lead to trouble. Many of these files use a variable frame rate or non-traditional audio compression.
Download the free program Handbrake and use it to convert your MP4 to a new MP4 with Constant Frame Rate. It will likely solve your problem.
You don't say how long this video is, by the way, or what your computer specs are -- but these two are factors that can contribute to or magnify your technical challenges with the file.
What's wrong with converting it using Premiere Elements? Why use another program and add extra steps to your workflow?
Handbrake has a confusing interface for new users and that's why I never recommend handbrake. Yes it's a good program and has been around for many years. But it's never been updated to make it more user friendly.
The poster said the video does not include its entire audio when he loads it into Premiere Elements, so I'm not sure how effective Premiere Elements will be in correcting this, terry.
Handbrake is an invaluable tool for correcting issues with non-camcorder video. I consider it an essential tool for my toolkit.
But you're right. It's not the only solution.
Hey thanks for all the help. I'll tinker a bit more, but I may just 86 this project. It isn't worth all the hassle, but I'll keep this all in mind next time I want to record something, maybe make sure the files will completely conform before beginning.