Hi Dan,
I know the post is really old, but I am facing a similar issues so I thought first to try here. I shot a shoty film in 1920×1080 but I want the final output to be in 1.85. I have done all the editing process letterboxing the project (I created a .png file with two black stripes of 21 pixels each). I’ve done all the editing, and now it’s rendering time.
Well, I want to render two versions of the project, both in .mp4: one in 1920×1038 and the other 1280×692. So I chose that size in the custom settings. However, I get an unwanted result: the output is indeed in 1.85, but sometimes all the pixels are cut from above (and therefore I see the black stripe underneath the image) and sometimes from below. That really doesn’t make sense to me. Any chances you guys know what I am doing wrong?
Thanks a lot!