Media Framework doesn't support mp4 level 5.2?

We’ve been building a 360 video player and had rendered our animation out at 4096x2048 and 50fps. This means the video has to be output at mp4 level 5.2, but when I bring those videos into UE4 the media player can’t play them, just a black screen.

But if we drop the framerate to 30 or below, the maximum for level 5.1 the video works just fine.

Is there a way to get UE4 to accept 5.2 mp4 files? A way that would carry over to android?

If not are there plans for the media player to be updated to support these formats? It would be a great help for 360 content where the high framerate really helps with video playback