unsupported: HEVC 12-bit HDR macOS/iOS
Tested
12-bit HEVC PQ HDR files can neither be opened by Quicktime X nor iOS 11 (iPhone X).
macOS 10.13.3 (17D25b)
iOS 11.2.5 (15D5037e)
I wouldn't let this keep you awake at night as no iOS device is even 10-bit to begin with and most 10-bit panels are 8-bit + FRC. Frame Rate Control or 'FRC' is the ability for pixels to rapidly cycle between two hues in order to create one intermediate color. An 8-bit panel therefor uses FRC to create all the missing hues between 16.2 million Colors and the 1 billion that a 10-bit panel can reproduce. Even the hyper expensive top of the line Sony 4K OLED Monitor does not have a 12-bit panel; instead it carries the ability to accept and process a 12-bit signal (such as the RAW files from the (URSA MINI 4K) to better prevent banding when down converting and displaying in 10-bit or 8-bit.
12-bit as a reminder is 68.7 billion hues to work with. Those Sony 14-bit A7RIII files? A cool 4.3 trillion. And finally those hearty 16-bit R3D files = 28.1 trillion. A lot.
Dolby would beg to differ over how many colors are needed to beautifully represent an image; The Dolby Vision spec not only supports a maximum of 10,000 nits but also a 12-bit color depth. At this high of a brightness the chance of banding becomes exponentially greater, warranting a the need for 68.7 billion different shades.
I wouldn't let this keep you awake at night as no iOS device is even 10-bit to begin with and most 10-bit panels are 8-bit + FRC. Frame Rate Control or 'FRC' is the ability for pixels to rapidly cycle between two hues in order to create one intermediate color. An 8-bit panel therefor uses FRC to create all the missing hues between 16.2 million Colors and the 1 billion that a 10-bit panel can reproduce. Even the hyper expensive top of the line Sony 4K OLED Monitor does not have a 12-bit panel; instead it carries the ability to accept and process a 12-bit signal (such as the RAW files from the (URSA MINI 4K) to better prevent banding when down converting and displaying in 10-bit or 8-bit.
12-bit as a reminder is 68.7 billion hues to work with. Those Sony 14-bit A7RIII files? A cool 4.3 trillion. And finally those hearty 16-bit R3D files = 28.1 trillion. A lot.
Dolby would beg to differ over how many colors are needed to beautifully represent an image; The Dolby Vision spec not only supports a maximum of 10,000 nits but also a 12-bit color depth. At this high of a brightness the chance of banding becomes exponentially greater, warranting a the need for 68.7 billion different shades.
