Hi Abi and Daniel,
I’m bumping this post as I’m in exactly the same position, and would love to know how you got on.
Apple’s specs for upload to iTunes are indeed mpeg-2, minimum 15Mbps, with a max horizontal size of 640.
I’m finding it hard to hit the 15mpbs minimum on videos I am transcoding from 1280 x 720 ProRes 422HQ outputs (which are 80Mpbs). Wondering if, as Daniel suggests, Apple asks for this 15mpbs minimum as a way of maintaining quality, even if in some cases the mpeg-2 program stream never has that much data in it?
Abi, were your videos accepted?
Adam
Audio | Motion | Video
https://www.minkengine.com