Preferred video format on iOS and status of ImgMediaSource

Our project is video intensive, making heavy use of the media framework. We’d figured out the ideal format would be image sequences (ImgMediaSource) as it’s supported on Windows, Mac and Linux. However, we just found out that image sequences won’t work on iOS (as of 4.22).

Could anyone tell us if ImgMediaSource is finally supported on iOS in 4.23? If not, what’s the preferred video format/codec? We found that MP4/H.264 doesn’t produce accurate colors. The newly ProRes weighs too much and we wouldn’t want to spend over 10k on Bink.

I’m reading about HAP right now – is this supported on iOS too? Thanks all!