Odd issue with Xfinity Stream and FX Now apps.

Not sure if just I'm getting them or if anyone else may be, but the Xfinity Stream app seems to have some slight stuttering/video glitches when changing from shows to commercials, it's almost like a minor freeze or glitch, and then when switching back, I've never noticed those issues with my TVs version of the app, so I'm wondering if it's an Apple TV issue or something else?


I'm using certified HDMI cables, have an excellent Wi-Fi connection, and have my Apple TV 4k connected to my LG C3 TV.


I've also noticed some random stuttering every few minutes, it's minor but noticeable when watching any Live channels on the FX Now app as well, that I don't notice if I'm watching on my computer.


Is there some issue with live streaming apps and its changing frames and all that or something?


I have my Apple TV 4k setup as 4K SDR, YCbCr 4:4:4, and match frame and range on, along with QMS, speed test shows a good 650-700mbps down, maybe I missed something when setting it up, or does it just have issues with live tv apps?

Apple TV 4K, tvOS 17

Posted on Oct 11, 2023 3:58 PM

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Posted on Oct 12, 2023 5:56 AM

Try this for any misbehaving apps:


YCbCr 4:4:4

Unless all your HDMI connections plug into HDMI 2.1 ports, I would suggest to configure as YCbCr 4:2:0 or 4:2:2 on Apple TV instead, as 4:4:4 4K HDR 60Hz exceeds the bandwidth limit of HDMI 2.0 ports. This won’t diminish the video quality at all, as all streaming video is encoded with 4:2:0 chroma anyway.

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Question marked as Top-ranking reply

Oct 12, 2023 5:56 AM in response to Zai_Kajou

Try this for any misbehaving apps:


YCbCr 4:4:4

Unless all your HDMI connections plug into HDMI 2.1 ports, I would suggest to configure as YCbCr 4:2:0 or 4:2:2 on Apple TV instead, as 4:4:4 4K HDR 60Hz exceeds the bandwidth limit of HDMI 2.0 ports. This won’t diminish the video quality at all, as all streaming video is encoded with 4:2:0 chroma anyway.

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Odd issue with Xfinity Stream and FX Now apps.

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