| dhgfuhdsgfvb |
Hozzászólás Sep 28 2019, 11:42 AM |
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The ATV4K converts Dolby Vision to HDR10 for displays that don't support Dolby Vision. This conversion results in one of two styles of luminance metadata: slow dynamic and static. Some systems may have video glitches when HDR10 metadata changes in the stream (i.e. is dynamic). Devices reported include the Lumagen Radiance and some Sony projectors e.g. the VPL-VW885ES. It's reported that Lumagen has a patch and Sony has released patches for some of their projectors. |
| sdhicvsduygfv |
Hozzászólás Sep 28 2019, 11:42 AM |
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The Apple TV as of tvOS 12 doesn't support pass-through bit streams. Atmos is sent as Dolby Metadata-enhanced Audio Transmission (Dolby MAT) via LPCM.
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| sertfyuhkof |
Hozzászólás Sep 28 2019, 11:41 AM |
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Apple and Netflix (and perhaps others) have 4K and 2K assets. Which asset is streamed is controlled by combinations of settings. Which combination does what may not be obvious and the Developer HUD is the best/only way to see the stream codecs, resolution, bandwidth and other (HLS/RFC8216) parameters and debug information.
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| fgthjmklnjf |
Hozzászólás Sep 28 2019, 11:41 AM |
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The Match Content Frame Rate option automatically selects the nearest supported rate which for 24.0 frames per second is 23.9. When 24.0fps content plays at 23.9fps a frame is dropped every 1,001 frames which might produce a visible glitch. Note that in the format menu Apple rounds all frame rates to the nearest integer. 30 is actually 29.9, 60 is 59.9 and 24 is 23.9.
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| ertyuiokpyu |
Hozzászólás Sep 28 2019, 11:41 AM |
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Apps on the ATV should be considered the responsibility of the author. Application capability varies from device to device for various, generally undisclosed, reasons but the competitive relationships between Apple, Amazon and Google result in various rendering issues. E.g. YouTube 4K/HDR isn't currently available on the ATV4K although it is available on some iOS devices. Atmos is not available on the ATV4K on Amazon features. These issues are well know and not limited to the ATV. Viz. YouTube on Amazon Fire devices or YouTube 4K/HDR via Safari vs. Chrome under macOS.
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