I’m not sure about the timecode issues…
as far as the dimensions of the file.
As long as “scale to fame size” is selected in prefs prior to first usage, and your sequences is at final output resolution, you should be able to add effects ok.
One way to determine this is to note that when you drop a small clip on to a hires timeline and it fills the frame, if you examine the effects controls, the scaling should still be displayed as 100%.
That’s because PPro does the mismatch transformation prior to the effects controls processing, leaving that metadata independent and thus allowing it to be transferred to clips of different dimensions.
If you can get the timecode and stability worked out…I’d test it to be sure…but I’m pretty sure that’s the deal…
Alex Udell
Editing, Motion Graphics, and Visual FX