50hz on a Shield

I’ve been playing around with Amiga games with Retroarch on my Nvidia Shield, and most are of course 50hz PAL games. Needless to say this looks really, really terrible in a 60hz display.

The Shield can run at 50gz and setting it to that works great in Retroarch, but it’s a manual system level process.

Is there, it could there be a way added to auto switch from 60 to 50gz on a game by game basis? (Rather like remapping controls for a specific game)