From AE, I exported a portion of a clip from an .mts video file into an APR442 movie file.
I opened a new project in Mocha and used that .mov file to create masks around a hand.
I then copied and pasted the Mocha Shapes data into AE and noticed the hand masks were offset by a bit.
I made sure my masks were ok in Mocha, which they were.
My settings match…frame rate, length (the masks are not offset by time, just in position), 1.0 pixel, etc…
BUT when I bring in the .mov file just to see, the masks line up a bit better, but still a bit off.
Mocha Pro Version 5.5.2 build 13566
After Effects CC 2017.2 version 220.127.116.11