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Topic:
displaying 4K 60fps on projector
This thread has 11 replies. Displaying all posts.
Post 1 made on Wednesday June 12, 2019 at 13:39
mrtristan
Senior Member
Joined:
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October 2003
1,431
equipment:

Optoma UHZ65
Yamaha RXA880
Apple TV 4K
Roku Ultra
Rogers Netbox 4K
Sony 1080p Bluray
35 ft Proconnect cable rated at 18gps. Has directional ends so it may be amplified.

The Optoma has two HDMI inputs. HDMI 2 is labelled HDCP2.2/HML

Everything goes through Yamaha receiver and Yamaha is set with video processing on at 4K

Using HDMI 2 on the projector, I can get Roku and Cheap Bluray player to work. Roku registers at 4K 60fps.

Everything works on HDMI 1 but only at 30fps.

What am I doing wrong? I would like everything to work on HDMI 2 if that is the only input that delivers 60fps
Tristan Leynes
Post 2 made on Wednesday June 12, 2019 at 15:41
iform
Active Member
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September 2010
649
That projector only has 1 2.2 input on HDMI 2. Can't use HDMI 1 for 4K
Post 3 made on Wednesday June 12, 2019 at 16:00
Fins
Elite Member
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June 2007
11,207
On June 12, 2019 at 15:41, iform said...
That projector only has 1 2.2 input on HDMI 2. Can't use HDMI 1 for 4K

I think he realizes that. But the appleTV and netbox won’t work at all on hdmi 1.
Civil War reenactment is LARPing for people with no imagination.

OP | Post 4 made on Wednesday June 12, 2019 at 18:46
mrtristan
Senior Member
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October 2003
1,431
The projector itself takes quite a long time to sync whenever I change input. One thing that surprises me is that even though I have Yamaha video processing turned on to 4K, the projector info about resolution as it syncs can vary. For example I did see it display 1080p after the Apple TV reset its resolution back to 1080p. I thought the receiver would upconvert every source to 4K and that's all I would ever see on the projector. Maybe it's a defective receiver but I hardly ever see Yamaha fail.

Is it possible that the HDCP 2.2 HDMI 2 input on the projector will not accept anything less than 4K or HDR? I would think that it's backwards compatible with older standards. I'll chart the sources and their ability to play on the two inputs if anyone can make sense of it:

Source HDMI 1 Input non 2.2 HDMI2 Input 2.2

Roku Up to 4K SDR 30fps Up to 4K HDR 60fps
Bluray 1080pWorks Works
Netbox 4K 30fps SDR No picture, sound works
Apple TV 4K 30fps SDR No picture when set to 4k 30fps

I was able to set the Apple TV to 4K HDR when on the HDMI 1 input but it had a very washed out look and had some banding. At this setting I could not get it to work on HDMI2. On top of this, I can get the Apple TV to do 4K HDR on HDMI 2 when I bypass surround receiver. I've tried different cables between Apple TV and receiver.

Last edited by mrtristan on June 12, 2019 19:00.
Tristan Leynes
Post 5 made on Thursday June 13, 2019 at 09:33
mark65
Long Time Member
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November 2003
427
I'm not familiar with Yamaha, but if it has a Thru mode I would use that and not have it scale to 4K. If you plug the appletv into the projector and it works then my guess is the receiver is messing with the EDID or HDCP. Switching to Thru mode might fix it.
Post 6 made on Friday June 14, 2019 at 07:33
jrainey
Active Member
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Posts:
September 2010
504
I would suspect that cable. What more can you tell us about it? the chip sets in the self powered cables can be dicey at that length. if a new cable is possible I would look to Metra.
Post 7 made on Friday June 14, 2019 at 11:56
MNTommyBoy
Advanced Member
Joined:
Posts:
November 2010
890
Yeah, what others have said. Turn off any video processing on the receiver.

Also, look into Ethereal. One should not trust a "house" cable to do an Ethereal type of install.

Last, get used to the occasionally rough PQ on the Optoma. I have the UHD60 and the banding and the whites are tough sometimes.
"Every word you just said was wrong." ~ Luke Skywalker
Post 8 made on Saturday June 15, 2019 at 11:57
Brentm
Ethereal Home Theater
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July 2003
2,469
The real question is why 60 fps on 4K?
What are you watching that can supply (do not say 4K/BD Player, as there is really only one movie)?
Brent McCall
Paid Endorser for
Ethereal Home Theater (386) 846-7264 Cell
OP | Post 9 made on Tuesday June 18, 2019 at 21:19
mrtristan
Senior Member
Joined:
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October 2003
1,431
Hi Brent

That's a good point. Are you saying most movies on Netflix on Apple TV or Roku are not available in 60fps? We are trying only because the customer likes to get the highest performance out of his stuff. If there is virtually no content that produces that I'll let him know. He was talking about getting a 4K Bluray player but are you saying there are also no mo

I just spoke with tech support at Metra today and he recommend one of the optical HDMI cables rates 24 gps max. I'm trying to get my distributor in Toronto to order it and can't wait to see if it makes a difference.
Tristan Leynes
Post 10 made on Wednesday June 19, 2019 at 10:00
jrainey
Active Member
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504
wait...what?....you are telling Brent you just talked to Brent?
Post 11 made on Thursday June 20, 2019 at 06:44
Brentm
Ethereal Home Theater
Joined:
Posts:
July 2003
2,469
Jack, I think that he talked with Adam.
New(ish), smart and a C4 guy, knows his stuff.
Brent McCall
Paid Endorser for
Ethereal Home Theater (386) 846-7264 Cell
Post 12 made on Thursday June 20, 2019 at 07:15
jrainey
Active Member
Joined:
Posts:
September 2010
504
Austin was telling me about him....he may know his stuff but he aint teh Jedi master of HDMI...just saying (hes not on here is he? :) )


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