Mediaplayer causes engine crash and can't open project any more

i was trying media framework, created a mediaplayer, mediatexture and material, applied it to a wall, it works, super cool. and then, when I changed the movie to another file, it threw an error and crashed. i tried to reopen the project after closing the editor, it keeps giving me the error and can never open open the project any more. Any idea how this can be fixed without recreating the project?

Try deleting the movie file. You should then be able to open the Editor again. If on Windows, make sure your movie is MPEG-4 encoded. There are bugs with some decoders and pixel formats - sometimes they don’t play at all, sometimes they crash. We are working on improving this.

problem solved. thanks.