I didn't know it could record straight to USB-C storage! That gets rid of a major reason to spend crazy money on a 1TB phone, and it's definitely a game changer for anyone shooting 4K ProRes.
Afaik it’s actually not even possible to record that directly to the phone, it has to be into an external usbc drive. If I had to guess it’s probably because of overheating concerns with the high write rate.
The 4k60 ProRes mode is not available for shooting on the 128gb model until an external drive is added, but for any larger capacity iPhone Pro, the mode is available for shooting without the external drive. This doesn't affect the Pro Max as that isn't available in a 128gb configuration.
Notably, a similar limitation existed with the iPhone 14 Pro using 4k30FPS, at the time the reasoning was that it simply fills the device too quickly to be useful.
You are 100% correct and my original data is wrong. (imore.com)
Apple’s website lists the external drive requirement for 4k60FPS:
4K at 60 frames per second (fps), iPhone 15 Pro and iPhone 15 Pro Max only, when using an external storage device that supports speeds of at least 220MB per second and maximum power draw of 4.5W
Unfortunately there is no way to edit my above comment, so my apologies for being the source of incorrect information here.
To capture any 4K ProRes footage with 128GB 15 Pro you need an external drive, this is presumably because 128GB model has a single memory chip and data write speeds are insufficient.
I might be doing something wrong, but when I tried to set BlackMagic Camera to ProRes Log 4K60 it had no problem recording it. I was even able to apply different free LUT files and export it to photos. It is 1.6Gb for 8 seconds, but did not require an external disk. [1]
Huh, interesting, I just tested it too and does work in Blackmagic camera (iPhone 15 pro 1TB).
I guess it’s only a limitation of the official Camera app while 3rd party apps can do otherwise.
