I am relatively new to Unreal Engine 4 but I came across a problem with the media player:
When I import a movie file (mpeg4/ mov, both H.264) I can’t play the movie in the editor. The screen where the movie should start is always black and it says “STOPPED” in the upper left corner.
Don’t know where the problem is and as I said I tried several mpeg4 and mov movies but none of them worked.
MPEG-4 encoded .mp4 files work, H.264 encoded files do not. There is a bug in WMF that prevents pixel format conversion to RGB32, and I haven’t had time yet to implement our own conversion on the GPU (it is too slow on the CPU). I hope to have this resolved next month though.