[MrMagic]

If a good value is found for timeout and preferred renderer is set, I can change my commit to it.

Still I believe this is caused by some bugs in the shield firmware and no value or render method will solve it.

Maybe, what is needed is some kind of clear memory after the movie ends or any way to properly kill the renderer.
Or even a hdmi state or EDID recheck if possible.

Do you know what the difference is between the dvhe and dvh1 decoders? I've been trying to search, but the documentation is all very technical

I think you are right about some kind of "reset" being required. I noticed that when I have troubles, sometimes it's enough to play a non-DV file and then go back to the DV file.

Other times it's enough to disable and re-enable DV in the Shield's Display settings and a full reboot is not required.