Atv4k and 4K projector owners

Discussion in 'Apple TV and Home Theater' started by surfer369, Mar 10, 2018.

  1. surfer369 macrumors member

    Aug 19, 2015
    i am hoping someone here is using atv4k with a projector and can help me with the issue I am having.

    I have a benq 4K projector. I have enabled 4K and match frame rate and dynamic rate or whatever it’s called. The home screen is not as punchy or with pop like I have it in my 1080p non 4K tv upstairs.

    Also, when I go into Netflix or HBO go or any app and press the button to play it will take a few sec like 5-10 sec to play and sometimes the audio starts before the video. Same thing happpens if I stop the video and want to go back to the previous page or to the home screen there is a delay. Is this a hdmi cable issue, the projectors detecting and switching back and forth trying to match content issue or something else.

    I have tried connecting it to the projector directly and through a 4K pass through soundbar as well and it’s the same behaviors.

    Hoping that there is a simple solution to this. The delay really takes away from the experience as it slows down the process of getting in and out of apps and playing videos.
  2. Rigby macrumors 601

    Aug 5, 2008
    San Jose, CA
    If this only happens when you switch into/out of video playback, then yes, the delay is most likely caused by the projector switching resolution and refresh rates. Mine does it too, but it's more like 3 seconds rather than 5-10. The alternative is to configure a fixed display mode and let the ATV convert the content as necessary (which may have an impact on image quality and playback smoothness).
  3. surfer369 thread starter macrumors member

    Aug 19, 2015
    Yes this happens switching into and out of video. Now switching between apps. Which projector do you have is it 4K? What fixed display mode can I configure that will give me best part without much sacrifice and the delay. Also could the longer switch for me being caused by the fact that the projector is connected to a soundbar 4K 35 feet long.

    Which hdmi cable are you using. Also does your atv4k home screen look washed out?
  4. Rigby macrumors 601

    Aug 5, 2008
    San Jose, CA
    Normally the default that the ATV automatically chooses (with content-matching deactivated) based on the EDID reported by the projector works best.
    I guess it's possible that the long cable might cause handshake issues. You can easily test this by bringing the ATV close to the projector (assuming you are using Wifi), connecting it directly to the projector with a short HDMI cable and testing if the projector switches between modes more quickly.
    I use a premium certified cable from Monoprice (this one). But they max out at 25ft. 35ft is quite long for HDMI. If the test above indicates that you have a cable problem, consider using two shorter cables with an active extender in the middle.
    No, that's probably an HDR issue with your projector.
  5. surfer369 thread starter macrumors member

    Aug 19, 2015
    Thanks I will try bringing the atv closer and connecting it directly to the projector and see if the issue is still there or goes away.
  6. waw74 macrumors 68040

    May 27, 2008
    also you could try leaving the aTV in SDR mode, with switching enabled. and it will switch up to HDR/Dolby as needed.

    That's what i do, since the majority of what i watch is SDR, i encounter the blackout during the switching less.
  7. surfer369 thread starter macrumors member

    Aug 19, 2015
    So change from 4K hdr to 4K sdr? And leave the switching for both options ON. And when I play a uhd show on Netflix it will automatically switch to hdr?

    What did you mean by “ I encounter the blackout during the switching less”.

    Just trying to understand the different video option and how it affects the content played.
  8. waw74 macrumors 68040

    May 27, 2008

    no matter which flavor of 4k you have your default set to, If you have both switching options on, all video will play exactly the same (as long as the app supports it. Apple's player, netflix, and amazon all support it)
    *if you do use the aTV for games, it will probably stay in whatever mode you have set as default.

    i have an LG OLED, it does the same blackout/pause thing when switching the type of video signal, although it's normally only 2-3 seconds at worst , All current TVs to some extent seem to do this.
    (i do get a shorter pause when it's only switching the frame rate, but it's about a second, and not really noticeable)

    "I encounter it less" ... for example i watch 10 shows, and 2 of them are HDR
    for 8 shows, there's no blink, since the TV is already in the right mode.
    for the 2 HDR shows, the blink happens.
    But, with HDR default it would be 8 shows with a blink, and 2 without

    When the screen saver starts, it will not change the current mode, so you will have no HDR for those, unless you have an HDR show paused.
    The screen savers do play a bit jerky since the frame rate is wrong for them, this will happen pretty much anytime you have a video paused.
  9. surfer369, Mar 11, 2018
    Last edited: Mar 11, 2018

    surfer369 thread starter macrumors member

    Aug 19, 2015
    I did connect the atv directly to my projector with a shorter cable and it’s the same behavior so I guess it’s not the cable. I switched to sdr and matching on but that washes out the home screen and the delay was still there. So looks like since you have a tv you are experiencing the shorter time maybe because the tv has more faster processing chips vs. my projector having slower processing power. I tried various content and it definitely takes more than 5 secs. I guess if this is normal than I will have to just get used to it. If I turn match off and sdr than it’s faster but I loose the pq. How do you know if a content is hdr? Netflix only displays as ultra hd or dv.
  10. Snoopy4 macrumors 6502a


    Dec 29, 2014
    Do like I did. Dump it in the home theater.

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9 March 10, 2018