I moved the marker points and saved the file. I saved the new file, the slow motion marker points are still there upon reopening the file.
Markers are not saved as part of the file. The QT X player "AUTOMATICALLY" opens the slow motion controller based on the recorded frame rate. If you don't want the slow motion control bar to appear, then decrease the frame rate to a more reasonable rate like 60/59.94 fps, 30/29.97 fps, or 24/23.98 fps. The QT players are programmed to drop frames anyway. So if you try to play a 120 fps or 240 fps file at full recorded resolution, it will drop frames during playback to "keep up" with data throughput. This is what causes the "jumpy" playback complained about above for QT 7 which is not programmed to use slow motion controls.
I do not know what speed the video was shot in or what a AAE "video sidecar" is.
Open the "Inspector" window the see the recorded frame rate as depicted below:
As you can see, the sample video was recorded at 119.88 fps [calculated as a (120 fps x 1000)/1001 NTSC standard]. As to the AAE "Sidecar" files, they may have bee done away with since this topic was originally discussed. (I.e., i did not see one generated in today's retesting of a sample file.)
I just want to know how to save a file without the slow motion markers returning so that I can edit the video in iMovie.
Most camcorders shoot at 24, 25, 30, and/or 60 fps—all of which, I believe can be handled by iMovie, FCPX, etc. If I plan to edit in iMovie v10.1.2, I normally use GoPro Studio to transcode the GoPro source file to the GoPro Cineform editing video format at a compatible frame rate for editing in iMovie. However, this workflow requires installation of the GoPro software for iMovie codec support and you have not indicated whether or not you have done this. An app like Handbrake could also be used to create an iMovie compatible file at a proper frame rate but this workflow can reduce the final quality of your iMovie edit if lower quality settings are used to create the intermediate file.