I have two different sets of media I’ve tried importing. One png sequence, the other a .mov, both have alpha channels.
I’ve not had problems in the past, but now I cannot import a PNG sequence using “img source” or a .mov using “file source”. Both are rendered as a black screen when I bring them into media viewer. With the .mov loaded in the media viewer, I can hear the audio, but the screen stays black and the timeline doesn’t move.
Hi Zonfar,
MediaPlayer is currently broken for me (and others) too. As a hack/temporary solution try changing the Default RHI in project settings from DirectX 12 to DirectX 11.
Let us know if that does the trick!
I just changed my RHI to DX11, but am still getting the same results upon trying to load either a .mov or a PNG image sequence.
I have switched to vulkan to see if that will provide any better results. Just gotta wait for all the shaders to recompile now!
edit: no go with vulkan either 
edit: have also enabled electra media player, no go. I see many others are having similar issues too, so I guess i’ll just report this as a bug, and hope someday I can load png sequences again
It seems the issue was my footage was too much for my PC to handle. I was trying to import a 4k PNG sequence with alpha on my machine with an i7-4790k, 16gb of ram, and 1080ti.
As soon as I rendered out a proxy version and used that, the image sequence seems to be working!