There is an issue on Apple TV default Video settings of 50Hz/60Hz changing during HDR activation!

[LordDevil1980]

Hello,

I have the following setup:

LG G4 65"
Apple TV 4K (3rd gen)
PC: 4090 RTX / 14900k / 96GB RAM
Windows 11

I am using latest software version as of today from Apple TV, Moonlight and Sunlight (Beta).

Everything works pretty nice, except that due to me living in Europe having the Apple TV Default Video signal set to SDR 50Hz with dynamic frame switching set to On. This works in most apps fine so they can request other frequencies and HDR mode.... But there seems to be a small bug in Moonlight release.

When streaming my FPS is capped at 50FPS (reported by info screen from Moonlight). This would be correct, since I have set my Apple TV to SDR 50Hz mode. But since I am also using the option: Request HDR activation -> Moonlight switches my TV and the AppleTV output to HDR mode... but with this switch it also changes my video siganl to 60Hz. Which would not be a problem if it match the FPS from the source... but you can (reported by Moonlight info screen) that it still caps at 50FPS. So now I have stuttering because it receives a 50FPS stream and tries to display it on the TV set as 60Hz.

So from a software engineer perspective, it looks like that moonlight checks the Apple TV Default setting and thus is using 50FPS, but due to the switch to HDR mode and changing my TV to 60hz - we have the discrepancy of 50/60! So either switch to HDR 50Hz mode, or better switch to HDR 60Hz mode (as it does now) but then also match the framerate at 60FPS and not 50FPS.

Maybe someone can look into that and fix it, because right now I always have to switch to SDR 60Hz mode in Apple TV defaults Video settings before using Moonlight, but since I require the 50Hz mode for many europe TV apps running PAL with 50Hz... it is cumbersome and I need to revert it all the time...

So when requesting HDR is enabled it needs to also check and match the FPS/Hz setting it will then switch and use.

Thanks in advance for your time and efforts and I hope someone can look into this and fix it :)

Kind regards,
Oliver

P.S. It's really an awesome software!!