Flicker in 24Hz Mode?

Discussion in 'Apple TV and Home Theater' started by geesus, Jun 13, 2018.

  1. geesus macrumors 6502


    Jul 3, 2015
    Has anyone else noticed distractingly bad flicker when using this screen mode to watch film-based material? If you watch any low-light scene, it is beyond annoying. Pausing the video playback shows that it is an issue with the video being output rather than a natural side-product of the lower frame-rate.

    This is on a B6 OLED. 60Hz mode is fine. Anyone else notice this or solved the issue in any way?
  2. BODYBUILDERPAUL macrumors 65816

    Feb 9, 2009
    No problems whatsoever for me when watching my iTunes/Vimeo films in 24hz mode.
    What HDMI cable are you using? Could it be a problem with your TV?
    I'm using the Apple recommended Belkin cable and a Panasonic EX700 TV and ZERO issues from day one with my Apple TV 4k which i've had for 7 months now.
  3. Audit13 macrumors 601


    Apr 19, 2017
    Toronto, Ontario, Canada
    Is the frame matching option enabled?

    I use an Apple 4k running the latest tvOS with an LG C7 and there is no flicker.
  4. geesus thread starter macrumors 6502


    Jul 3, 2015
    Yup frame rate matching is enabled and the cable is fine. It might be a B6 specific problem, so if anyone with that specific LG OLED could test, it would be awesome. Again, low-light scenes will show it in the black areas of the picture. If you pause it then it continues to flicker.
  5. BODYBUILDERPAUL macrumors 65816

    Feb 9, 2009
    Certainly seems to be a B6 problem. Damn LG!!!
    The very best of luck and hopefully, Apple will look into this as it's a 4:4:4 problem. Apple really seem to be on the ball with the Apple TV 4K so crossed fingers for you buddy!
  6. geesus thread starter macrumors 6502


    Jul 3, 2015
    Having decent results since swapping from YCbCr to RGB so will see if that solves the issue.
  7. Matthew Essex, Jun 15, 2018
    Last edited: Jun 15, 2018

    Matthew Essex macrumors member

    Matthew Essex

    Apr 11, 2014
    Set your trumotion settings to custom 0 and 0 and it should solve the issue if I remember correctly on my B6
    --- Post Merged, Jun 15, 2018 ---
    It used to affect my main app screen as well as watching movies and this solved it for me.
  8. Andrewtst macrumors 6502


    Oct 28, 2016
    So far I don't face such issue after using High Speed HDMI cable.

    Previously I can't set RGB High or Chroma 4.2.2 when using a normal speed HDMI cable where the screen keep flickering with popping sound.
  9. shakopeemn macrumors newbie

    Jul 29, 2014

    I also have the LG OLED65C6P 4K UHD SMART OLED, which is the 2016 model. It doesn't support 24fps with Dolby Vision, nor does it support Atmos over HDMI. It's still receives a Dolby Vision signal from ATV and looks great, but I can't use 24fps.
  10. geesus thread starter macrumors 6502


    Jul 3, 2015
    Using RGB High has definitely solved it for me thankfully.

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10 June 13, 2018