[James Barr]

Is your source file an H.264 file with a .m2ts extension? If so…likely the problem. I’ve had issues with .m2ts H.264 files in EVERY major professional video editing program. I don’t know if it’s the wrapper that messes it up or what, but….it’s a pain in the rear. Use a 3rd party program to convert it to something else, then work with it; but that’s not really a timesaver, so you’ll probably need to record in a different format to begin with.