I want to know how to use the scale filter to take an image that is 2154x1136 and scale it down exactly 89.04% such that the image sits in a 1920x1080 frame, with full image left and right and black letterboxing top and bottom. Using
gets me close. But the resulting file is 1920x1013 and I need to add black pixels top and bottom to fill it out to 1920x1080.
I have other issues including how to feed ffmpeg a dpx sequence and get back an Avid-ready MXF while applying a shot specific cdl file and a show specific display lut, but I need to walk before I can run so a bit of help with this first puzzle is what I'm asking for now.
Thank you in advance.