Custom Frame Size - Panasonic GH4

[TogTobias]

Figured this out. Turns out that in video mode the GH4 switches over to 16:9 (duh). In FF3D the 16:9 aspect ratio has to be selected from said drop down when setting up the custom frame size. After doing that, the images are identical.

I hope my mistake will help the next person set this up correctly. Happy Pre-Vizing!