I had some luck importing the MH takes into Davinci Resolve Studio, cutting out one of the audio tracks, maintaining the fps, sizing, etc, and exporting to the photo JPEG codec. When I open the rendered clip in VLC it looks fine and Unreal actually completes the importing of the video now without giving me an error. Only problem is when I load up the performance takes to review and apply, the video is 90 degrees sideways and won’t track.
edit
It took some figuring out, but do this (below) before you import your takes into Unreal. In each take folder, there’s the “Video_Metadata.txt” file. If you open that up, my dimensions were listed wrong (width 1280, height 720), the opposite of what it should be. I switched it to width 720 and height 1280, then changed the Orientation from 4 to 1… and that seemingly fixed the rotational problems I was having on import. Now my clips will ingest and load into metahuman animator, from iphone 15 Pro Max recordings.
haha, looking forward to when they have time to fix this.