[Noah Poole]

I would capture the screenshots at 1024×786 and scale them to fit in the FCP timeline. Use uncompressed 8 bit or DV NTSC for the sequence setting in FCP and export with compressor using the “dvd best quality 90 minute” setting.

[Noah Poole]

Option-Dragging the new file from the project window over to the file you want to replace in the composition’s timeline will do the same thing.

[Noah Poole]

What settings are you using in compressor? In compressor, you can manually set the frame size in the geometry subsection of the inspector panel. With square pixels, 640×360 or 853×480 will be 16×9.

I would stick with square pixels. HDV uses a rectangular pixel (.75×1) that quicktime is interpreting as square (1×1) and distorting.

There’s a pretty good explanation of pixel aspect ratios here:
https://www.geniusdv.com/news_and_tutorials/2008/12/what-are-pixel-aspect-ratios.php
and here:
https://lurkertech.com/lg/pixelaspect/

[Noah Poole]

I’m not sure if this has anything to do with it, but why is the z value in the emitter’s position expression set to the y value in the cup track’s position?

[Noah Poole]

I’m no expression wizard, but I think I have a solution. You’ll need to tell it to use your expression if the comp time is less than where you want it to stop.

if (time < 1){; (wiggle(5,7)); }else{; transform.position} time < 1 is saying only do the wiggle before the 1 second mark. transform.position is saying to use whatever position keyframes are set. Sorry if I'm not explaining that well, but if you plug in your expression instead of the wiggle that should work.