Infuse doesn’t seems able to reach the peak brightness in HDR mode on Vision Pro. I also noticed the content brightness is affected by brightness slider in Vision Pro.
As you can see two images I captured in low brightness and max brightness. The roof tile brightness is very different. In Safari on the other hand, the brightness slider doesn’t seems affect the overall brightness(at least pretty minimal).
I suspect to reach maximum brightness must be in immserive mode with AVKit, which is the one Safari is using. Since Safari is providing same result in windowed mode. Only reach high brightness when entered immersive mode.
I also tried YouTube native app to make sure it isn’t the video format issue or HDR isn’t triggered on Infuse. Since the video infuse is ripped using yt-dlp with vp9 codec. May be different from what safari is playing. So I sideloaded iPadOS version of YouTube app, there’s no immersive environment in it. As you can see it provides similar result as Infuse. YouTube apps also saying it’s played in HDR mode. So it also confirmed that VisionOS might not allow to reach peak brightness when not inside the immersive environment built by AVKit.
I forgot to test YouTube app in low brightness. But the result is pretty obviously since safari’s tile is showing at 255,255,255(might be clipped by screen recording since it only support SDR) and YouTube not even close to 255,255,255
Unfortunately, HDR VP9 content has limited support at this time. Most current Apple hardware has support for VP9, but the required APIs are private and can only be used by the YouTube and Safari apps.
Playing HDR HEVC content should allow you to have better results in Infuse.
Thanks for quick response.
I repeated the test in HEVC profile 8 Dolby Vision again. I’m still getting the similar result. The brightness of video in Infuse still lower than Safari, as well as the preview from Apple. And also affected by brightness slider, even at max brightness the result still dimmer than the others.
However I noticed the content doesn’t have to be in immersive mode like YouTube. Both Safari(as long as it’s in fullscreen) and Preview app showing the peak brightness in windowed mode.
Also it seems like brightness slider does change the brightness of video in Safari and Preview app. However when I maxed out the brightness the peak brightness of video gets lower in Safari and Preview app. It’s probably related to ABL with micro-oled.
