My imported MP4 files are having serious issues - they play back very chopped and occasionally have a small audio distruption. I have tried all of the MAGIX tricks for optimization - prozy files, lightning bolt, etc. I'll emphasize that this is JUST one file - no other files, no effects. It has happened to all of the files I have tried. The video is 1080p MP4, and it plays fine on Windows Media Player. And it's not just the playback for editing - I tried exporting it and the exported video was just as bad, and maybe even a worse. I've tried cutting the length of the files down, but with no luck.
An intersting thing - no matter how many times I restart the program or import the files, the disruptions occur at the exact same times, with choppy footage or occasional blackness.
I'm using Movie Edit Plus 2015 on Windows 8.1, i7 processor with 16 gb RAM.