Originally posted by claimed4all I realize that Pentax is not going to create a fix for this, but in all of there testing they do, some where and some one took a Pentax K-r Video file and edited in iMovie.
Highly unlikely. They don't support Mac OS, so they aren't going to spend time testing on it, or any applications specific to it. You won't get any support regarding Pentax employee's personal experiences, because they don't support it.
Again, you should contact the makers of iMovie about this. There is nothing wrong with the video files that Pentax cameras produce, and it's up to an application author to ensure compatibility with the various formats people use.
EDIT: Did you even try searching for this issue first? I just did a quick google search of "motion jpeg imovie" and the very first result was
this support article detailing your problem.
This was an additional result, and a likely solution for you.
This was the fifth result of the same search.
This was the eighth result, a post confirming that your problem is an eccentricity of iMovie.