Hello, I have recently bought new 11" iPad Pro with M4 and Tandem OLED screen. The screen is very bright but whenever I play HDR videos (MKV container) in Infuse, movies never reach their peak brightness in highlights. HDR clips on YouTube are ok. It is very frustrating to watch a movie that looks the same as in previous iPad with LCD display. However when I start recording, the movie switches the brightness on and it looks wonderful. Update: if the movie contains Dolby Vision Profile 8 metadata, the iPad reaches its peak brightness easily. It seems that HDR10 content can not get any highter than 1000 nits so that is why HDR10 movies look dimmer.
Can you upload a sample file you are seeing this issue with which we can test here?
There are some video formats (which include many YouTube downloads) that Apple doesn’t allow apps (other than YouTube) to play in full HDR.
It happens with every movie with HDR10 and DV8 (movie remux in MKV container). I tested 10 movies. When I untick Dolby Vision it plays HDR10 base layer and despite having 100% brightness it is dimmer. When I tick Dolby Vision, the brightness goes all way up. It must be Apple issue as you mentioned because when I tried to put the movie remux into MP4 container and played it in system player of iPadOS it was also dimmer. Only Dolby Vision P5 and P8 movies and samples reach full peak brightness in HDR on my iPad.
Yes, if the issue also happens when playing the video in Apple’s apps it could be a system bug or an encoding issue specific to the HDR portion of this video.
Thanks for following up.