Transform "original size" not working properly.
This may be related to bug #1193 but I am not sure. Honestly I find that bug report very hard to understand.
Anyways, my issue is this: I'm working with 4K clips in a 1080p project.
When I apply the transform effect to a clip in the timeline, the zoom and translate functions work perfectly.
When I click on "Original Size" icon, I would expect the clip to be zoomed in to the point where one pixel of the original clip equals 1 pixel of the viewport. With 4K footage on HD, that would approximate 200% zoom.
What is actually happening is that it gets a zoom factor of about 57%. This would indicate to me that the math to calculate the proper zoom factor got flipped around somehow.