This app allows you to switch the hertz of your display. This is a tool for advanced users, please read this entire description. Hopefully this app will be obsolete sooner rather than later.
If you have a compatible TV or monitor, you may want to view specific content on a different hz. Apps can actually switch the hz used by your device. This feature is new to Android, and thus very few apps support it yet, which is the main reason an app like this one can come in handy.
Unfortunately, at the time of this writing, even if developers added this functionality to their apps (devs: check preferredRefreshRate in WindowManager.LayoutParams), it may not work right or at all. There are several issues with Google's current implementation, as it exists on the Nexus Player, firmware LRX21V:
- The available modes appear to only be detected on Android TV boot. This means your TV or receiver needs to be turned on and switched to the correct input before booting the Android TV device, or not all the modes your TV supports will be recognized.
- Switching hz may break audio. This app provides an option to fix that, but that does require your device to be rooted. Note that this may be both Android TV device as well TV dependent - your setup may not display this issue.
- Switching hz may randomly reboot the device
- The Android API lies. It'll happily report the current refresh rate to be X hz while it is actually Y hz, which may cause timing issues for video apps that actually take refresh rate into account.
- There is no hz override in display settings
So, until these things are fixed Google-side - and it would actually start to make sense for developers to include the functionality in their apps - at least you can play around with this.
Note that 'forcing' a certain hz might be wording it too strong. Android is still free to ignore the setting, and if an app really wanted to, it could override it as well.
Disclaimer: works for me, provided as-is, this app has no support, the situation describe above may change at any time
Why?
I was looking at committing this feature into xbmc/kodi, so I built a quick proof-of-concept app first, as I has not used the API before. During testing I quickly noted that the API doesn't work reliably enough yet to be part of that project.
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