https://bugs.freedesktop.org/show_bug.cgi?id=71796
--- Comment #13 from Kertesz Laszlo laszlo.kertesz@gmail.com ---
I think this file is exceptional and so it not working is probably unrelated to whatever issue others are seeing.
It doesn't work because vdpau doesn't support field coded mpeg2. I guess because it is very rare - other than compliance streams this is the first one I've seen in the wild, and given it's mpeg2 in mkv with ac3 and the cartoon content is a mix of progressive and interlaced (maybe from telecine and frame rate converted) I don't know if it's an amateur creation or something "real".
The problem here is that a movie playback can mess up your session because the driver cannot cope with an exception caused by a specific video format. This should not happen in any circumstances.