Steps to reproduce recorded: http://light-alloy.ru/ue4/48movieplayer_crash.gif
Video file used: http://light-alloy.ru/ue4/Trash_1.avi
Let me know if you were able to reproduce an issue.
P.S. I don’t know why, but when Trash_1.avi loaded media controls are disabled and it cannot be played…
Thank you for taking the time to report this issue. This is actually is a known and reported issue, and was originally reported in 4.6.1. The bug is very particular and deals with only certain video files affected, but i wasn’t able to determine what makes the difference. This problem may not be fixable until we actually replace the WMF implementation with something else.
Let me know if you have any other questions or concerns.