2160p 24fps Passthrough Only detected -- any good?

Discussion in 'TiVo Bolt DVR/Streamer' started by jmccorm, Feb 28, 2016.

  1. jmccorm

    jmccorm Special Forum Guest

    Oct 8, 2000
    Tulsa, OK


    When going through my TV resolutions, TiVo couldn't drive my 2160P mode directly but did end up detecting a 2160P Passthrough mode (3840x2160 @24fps).

    I can select it as one of my available video modes, but will the TiVo Bolt actually use it for anything? It still does everything 1080P that I can find.
  2. mikeyts

    mikeyts Stream Warrior

    Jul 10, 2004
    San Diego,...
    Did you try 4K Netflix titles or 24p 4K YouTube titles? (YouTube is a little tricky since lots of its 4K stuff is 60p or 30p which will probably get you just 1080p60 or 1080i60. Try "Travel Feels: Norway"; I've verified that it's 24p).

    With my television (Vizio 2014 P-Series) I'm able to enable both 2160@24Hz passthrough and 2160@60Hz on the Bolt. I'd like to enable almost every format and let my television upscale but if I do that Netflix becomes completely unusable, so I enable 2160@60Hz and 2160@24Hz passthrough only. I notice that it will not let me enable 2160@24Hz without 2160@60Hz (I tried 1080@60Hz plus 2160@24Hz but no joy).
  3. jmccorm

    jmccorm Special Forum Guest

    Oct 8, 2000
    Tulsa, OK
    Thanks! I was still on the $7.99 tier with Netflix, so I didn't want to go to the 4K tier to try something out, because if I had to move back, I believe they changed their price to $9.99/month.

    That YouTube video did the trick. I have a 70" TV from 2014 which did not advertise 4K capabilities, so the question for me was, is it actually delivering 4K, or is it simply syncing to the signal but display at 1080 resolution?

    The TV put up a banner indicating that the mode changed from 1080p to "3840x2160". The info screen claimed 25fps. So I pulled a couple of people together and we got a couple of feet away to try to judge it.

    The low FPS was distracting in that there was visible jumping at times during some of the panning scenes. The TV clearly wasn't trying to smooth things out. But it looked like the resolution was there. But it isn't something that I'd want to stick with.

    On this particular TV, given that it is usually 10' away, I think I'm still going to prefer staying at HDTV resolutions. So this was very helpful. Thanks!
  4. aaronwt

    aaronwt UHD Addict

    Jan 31, 2002
    With my Sony TV, if I have the HDMI port set to enhanced and go directly to the TV, I have no problem enabling 2160P60. But when going through my speaker bar, when the HDMI input is set for standard, that is the only way I can send 2160P60 from the Bolt. With the HDMI input set to Enhanced, going through the speaker bar, 2160P60 is grayed out in the Bolt.

    Apparently this is not unusual since I see this same behavior from other 4K devices when going through my speaker bar. Since when the HDMI input is set to Enhanced, it allows a 10bit input. And 10 bit at 60fps requires 18Gbps of bandwidth, which apparently my Sony speaker bar can't handle.

    While the HDMI input at standard, only allows 8bit. And 8 bit at 2160P60, needs much less bandwidth.

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