Apple TV owners' thread. - Page 186 - AVS Forum | Home Theater Discussions And Reviews
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post #5551 of 5558 Old Today, 01:03 PM
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Quote:
Originally Posted by nathan_h View Post
Apple asserts their chroma up sampling is better than what your display can do. So they suggest 4:2:2.

(Yes, the question is reasonable: How can they be sure? Well, just like they are sure that up converting SDR to HDR is superior....?)

IMO, you should try both.
do you know if there are color banding issues with 4:2:2 chroma forcing 8-bit output?

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post #5552 of 5558 Old Today, 01:36 PM
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Have to say, I'm really impressed with iTunes' 4k/HDR encodes. I turned on the playback hud in the developer settings on my 4k Apple TV, and it looks like the 4K iTunes encodes seem to be variable between 25-30mbps. I've seen it get as high as around 35mbps too. They look fantastic too. One other interesting thing of note, is it seems to always pull the Dolby Vision files even if you set the video output to HDR10. It must be doing some conversion between HDR formats on the fly, because the videos definitely still looked like they have HDR.

4K HDR Wonder Woman iTunes Media Info: https://imgur.com/uXNT0Mm

4K HDR Luke Cage Netflix Media Info: https://imgur.com/UsgIp9o
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post #5553 of 5558 Old Today, 02:15 PM
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HDR10 is basically just a subset of Dolby Vision. So the conversion is like a down conversion. It’s way better than SDR, but the real question is it good enough?


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post #5554 of 5558 Old Today, 02:27 PM
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Originally Posted by tjcinnamon View Post
All DV titles can do HDR10. There will never be a Dolby Vision title that cannot do HDR10. HDR10 always must be present.
Not necessarily true. With a BD 4k, if in DV, then HDR10 is also required.

But for streaming, there can be only DV and not HDR10. Just look at all the UHD Vudu titles that have HDR. It's only DV. No HDR10. If you play one of these movies on a display that only does HDR10, then there will be no HDR.

The problem with ATV 4K is that if the show only has DV version of HDR, it will still appear HDRish on an HDR10 display because the friggin' box send everything out as HDR. The HDR on the ATV is a mess and a joke. Shame on Apple for this atrocity.

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post #5555 of 5558 Old Today, 03:07 PM
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Quote:
Originally Posted by tjcinnamon View Post
do you know if there are color banding issues with 4:2:2 chroma forcing 8-bit output?
I only saw the 4:2:2 banding when going through my receiver, and even then it was only on the 24 Hz setting. Didn’t see it on 60 Hz 4:2:2.

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Originally Posted by Larry Little View Post
Not necessarily true. With a BD 4k, if in DV, then HDR10 is also required.

But for streaming, there can be only DV and not HDR10. Just look at all the UHD Vudu titles that have HDR. It's only DV. No HDR10. If you play one of these movies on a display that only does HDR10, then there will be no HDR.

The problem with ATV 4K is that if the show only has DV version of HDR, it will still appear HDRish on an HDR10 display because the friggin' box send everything out as HDR. The HDR on the ATV is a mess and a joke. Shame on Apple for this atrocity.
Depends on the streaming service. Apple has said on iTunes each title may have HDR10, DV, both, or neither.

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post #5556 of 5558 Old Today, 03:49 PM
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Quote:
Originally Posted by Larry Little View Post
But for streaming, there can be only DV and not HDR10. Just look at all the UHD Vudu titles that have HDR. It's only DV. No HDR10. If you play one of these movies on a display that only does HDR10, then there will be no HDR.



The problem with ATV 4K is that if the show only has DV version of HDR, it will still appear HDRish on an HDR10 display because the friggin' box send everything out as HDR. The HDR on the ATV is a mess and a joke. Shame on Apple for this atrocity.

Sony TVs that support HDR10 can play all Netflix DV content available to my DV TV, in HDR10. Does Netflix have encodes of both, or is the app just converting it on the fly? Is Vudu just making a statement by only supporting the format they approve of? Could they convert to HDR10 in the app if they wanted?

How do you propose Apple display Netflix DV content on an HDR10 only TV? As SDR? Seems most would prefer whichever looks the best.






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post #5557 of 5558 Old Today, 03:50 PM
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Originally Posted by jwort93 View Post
Have to say, I'm really impressed with iTunes' 4k/HDR encodes. I turned on the playback hud in the developer settings on my 4k Apple TV, and it looks like the 4K iTunes encodes seem to be variable between 25-30mbps. I've seen it get as high as around 35mbps too. They look fantastic too. One other interesting thing of note, is it seems to always pull the Dolby Vision files even if you set the video output to HDR10. It must be doing some conversion between HDR formats on the fly, because the videos definitely still looked like they have HDR.



4K HDR Wonder Woman iTunes Media Info: https://imgur.com/uXNT0Mm



4K HDR Luke Cage Netflix Media Info: https://imgur.com/UsgIp9o


Very nice. I knew they had to be running high bitrate due to how good the movies looked. How do you enable that overlay?


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post #5558 of 5558 Old Today, 03:55 PM
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Originally Posted by rick98761 View Post
Very nice. I knew they had to be running high bitrate due to how good the movies looked. How do you enable that overlay?


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If you have a Mac with xcode 9, follow the steps on this page under the Apple TV area: https://stackoverflow.com/questions/...-9-with-ios-11

Then once you've finished that, go to the settings app on the Apple TV, and there will be a new developer section. In there you can turn on the playback hud.

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