It turns out the behavior has nothing to do with the timing problem. I just noticed it more.
So I put in one JPEG screenshot. That’s it. When initializing the Motion project, the duration was 10 seconds. The time line ends at 10 seconds. The “Show Project Duration” reads
10 seconds. Then when I open System Preferences/ Time and Date and follow the second hand, the 10 second movie takes 20 seconds to run. After 10 seconds we are at the 5 second mark.
So the problem initiates before the export. So it’s not the export settings.
Motion is running twice as slow as what the time line purports.
Is there a setting somewhere ???
Thank you for helping.