Originally Posted by Robert Knecht Schmidt (Post 826995)

Has anyone else had the problem of files encoded to H.264 mp4 crashing Windows Media Player 10 or Windows Media Player 11?

I am able to open the mp4 file in WMP just fine, and can seek around in it. It plays flawlessly and the audio stays in sync.

But when I hit the stop button or try to close the media player, the media player hangs. Only way to get rid of it is by ending the process in the Task Manager.

This happened to me in WMP 10. I figured it might be fixed in 11. Tried to install 11, couldn't, because I only have Windows Media Center Edition 2002. Found workaround instructions here and got WMP 11 installed successfully. Same crash behavior.