I’ve noticed on my new ATV 4K that videos played back via Infuse are somewhat darker than the same thing played back in an app that uses Apple’s native player like Plex or Emby. This is in both SDR and HDR modes. Shadow details especially are being lost.
Is there a black level or colorspace issue I need to figure out?
Hi James, thanks for the support but I think I’ve narrowed it down.
First of all, I’ve installed the latest update of Infuse and then did side by side comparisons leaving the video running in both Plex (native player) and Infuse and using the task switcher. What I was saying was lack of shadow detail and interpreting as black levels being off is not quite right. It seems to be a sharpening or upscaling issue.
I’m using a 1080p BD rip as the source and the ATK 4K is in 4K SDR mode.
Colors and black scale do seem correct. But Infuse is not as sharp as the native player and that is what was noticeable to me. Perhaps the native player uses a different upscaling algorithm? What does Infuse use for upscaling 1080pto 4K? Or does it not upscale at all and leaves it to the ATV or what exactly?
We’re currently in the process of migrating from OpenGL to Metal (in order to add HDR support) and will look further into this once this has been completed. It’s possible this transition alone may clear up any differences you are seeing, but obviously we’ll do everything we can to get this addressed.
If it helps, on my old 1080p ATV 4 this was not an issue so I really do think it has to do with upscaling quality where the native players is doing really pretty good upscaling to 4K while Infuse is not yet.
At this point we’re doing it out of necessity for HDR, but it could prove to have other side benefits. Long term, it’s probably a good idea anyway since Apple is putting much more effort into improving Metal compared to OpenGL.
I’ve tested this again with the latest release and there is still a noticeably better PQ with the native player in Plex direct streaming than in Infuse. I’ve done side by side comparisons of the same film/scene. It appears the native player is using a better upscaling/sharpening algorithm compared to Infuse.