Premiere: How to export at exact down-scaled resolution? Preparing a trailer for an iOS app. I have source footage in iPad and iPhone X native resolutions (2732x2048 and 2688x1242 respectively), but they required scaled-down videos (1600x1200 and 1920x886 respectively).
Although those are theoretically the same aspect ratios, they are in fact not exactly equal. This shows up when I export from Premiere. Even though I input those specific down-scaled resolutions in the export properties, the resulting videos are slightly different: 1600x1216 and 1920x896.
I've been looking for settings to force a specific resolution - I don't really care what kind of scaling/stretching is done to achieve it (as long as there are no black bars) - but I've failed to find any.
Things I've tried:

changing the sequence properties and setting the exact size there, and zooming out the source clip to fit, but somehow that still came out problematic.
auto reframed sequence, no bingo

Any tips on this would be greatly appreciated, as I'm starting to LOSE MY MIND lol...
In general I would set my sequence settings to the desired delivery formats, and scale my source video to fit those. I wouldn't ever squash or stretch the video, as this looks very bad, and all iOS devices these days have square pixels (ie a pixel aspect ratio of 1:1 (or some multiple thereof if you're dealing with retina displays).
In general mp4 files (if that's what you are exporting to) prefer resolutions which are divisible by 16 ( I think - although someone on here may be able to correct me).
Your options are to rescale and zoom manually, shot by shot, to accept letterboxing, or to crop some of your content.  Rescaling and zooming to whatever is most relevant in each shot would be my preference.