Apple TV 4K doesn't support 24Hz output (Correction - it does manually)

Discussion in 'Apple TV and Home Theater' started by ActionableMango, Sep 14, 2017.

  1. ActionableMango, Sep 14, 2017
    Last edited: Sep 15, 2017

    ActionableMango macrumors 604

    ActionableMango

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    Sep 21, 2010
    #1
    As reported by jasper1977 in his post here, Craig Michaels from Apple has confirmed that there is no 24Hz output capability in the ATV4K. Because of this, 24Hz content (typical movie rate) is output at 60Hz instead (typical TV rate), which causes a framerate mismatch leading to visual judder.

    If you would like to see this change, please leave feedback at the following link. It will take less than 1 minute. Apple claims to read every single one:
    https://www.apple.com/feedback/appletv.html

    Before you take the time to respond to me about how nothing will come of this... well you might be right. But the time you took to knock me down is time that you could've posted feedback to Apple instead.
     
  2. vipergts2207 macrumors 65816

    vipergts2207

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  3. archer75 macrumors 65816

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    #5
    While I don't care about 24hz I do appreciate you posting the link. I used it to request support for the HD audio formats which are very important to me.
     
  4. megatron2000 macrumors newbie

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    #6
    Done
     
  5. Seb2k macrumors newbie

    Seb2k

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    #7
    Done, also mentioned the lack of TrueHD audio and raised my concerns about Atmos support.
     
  6. ActionableMango thread starter macrumors 604

    ActionableMango

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    #8
    I just bought ceiling speakers today. This weekend I will be working in the attic. I hope it is worth the trouble.
     
  7. macpro2000 macrumors 6502a

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    #9
    Atmos is super cool. Not much content out there but I love it in my theater.
     
  8. Bayshun macrumors member

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    #10
    AFAIK, none of the current major streaming boxes support 24fps. I don't know what all these companies seem to have against it.
     
  9. andrewstirling macrumors 6502

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  10. amro macrumors 6502

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    #13
    Yep. Shield does. And as much as I hate Android TV and its ugly UI, the Shield outputs amazing picture quality along with all the proper audio formats...Come on Apple. Seriously?
     
  11. WilliamG macrumors G3

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    Seattle
    #14
    Oy that just sucks... so much. Good grief, Apple! Not supporting the correct frame-rate for material is plain idiotic in the latter half of 2017... ugh.
     
  12. hipnetic macrumors 6502a

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    #15
    My TiVo supports 24Hz and has a VUDU app, and that's been my preferred streaming box for some time. I don't have a 4K TiVo (Bolt) so I'm not certain if that supports 24Hz 4K.

    I was hoping this new AppleTV would support 24Hz after hearing them talk about how the latest iPad Pro models could support multiple Hz options. I hate judder.
     
  13. Strelok macrumors 6502a

    Strelok

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    #16
    If you buy a good TV, it will generally compensate for this. Check rtings.com for reviews, there is a judder section that will tell you whether the TV can playback 60i/60p inputs without judder and what settings achieve this. That said, pretty much every single TV out there has no judder with 24Hz input, so I’m not sure why these boxes don’t support it. Maybe it’s because most TV shows are 60FPS, and with movies they expect you to use a Blu-ray player?
     
  14. xsmett macrumors regular

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    Nov 1, 2015
    #17
    That means we need to set Apple TV to 4k to 60fps and live with the 3:2 Pulldown.

    But for some of us there might be other problems. 4k with Dolby Vision and 60fps is for example not supported by the pretty common LG Oled B6. We need to manually set the TV to 30fps to get Dolby Vision support. Thats really crap.

    The ATV needs 24fps and auto switching framerate. Come on Apple.
     
  15. AdamSeen macrumors member

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    #18
    Done - Will the judder be that noticeable?
     
  16. vipergts2207 macrumors 65816

    vipergts2207

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    #19
    Generally in panning scenes, yes.
     
  17. Rigby macrumors 601

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    #20
    It differs from person to person. If you haven't noticed it so far on regular cable TV or when using other devices that don't support 24Hz (such as the Roku), you're not likely to notice it now (tip: don't go looking for it too closely, you may not be able to "unsee" it in the future ;)).

    Many modern TVs do a pretty good job reversing the judder.
     
  18. LtRoyalShrimp macrumors member

    LtRoyalShrimp

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  19. prwiley macrumors newbie

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    #22
    Hz = cycles per second

    Do you mean 24 frames per second (fps)?
     
  20. andrewstirling macrumors 6502

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    #23
    In terms of output from the Apple TV, aren’t they largely interchangeable? Of course the display will almost certainly be converting the 24hz signal into a higher multiplier such as 72hz
     
  21. WilliamG macrumors G3

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    Seattle
    #24
    Actually most TV shows (like actual show
    Yes, and he actually meant 23.976fps (24p).

    Anyway, apparently my LG OLED C7 can remove judder from 24p sources played at 60p, so this shouldn't be an issue, I believe...
     
  22. Rigby macrumors 601

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    San Jose, CA
    #25
    Hz is the correct unit for the refresh rate of the display. Frame rate usually refers to how often the frame buffer of the source is updated and can be different from the refresh rate of the connected display (which causes artifacts such as tearing or motion judder).
     

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