ProRes video recording remains limited to 1080p quality at 30 frames per second on the 128GB model of iPhone 15 Pro, unless the device records directly to an attached external storage drive.
On iPhone 15 Pro and iPhone 15 Pro Max 256GB and above, the ProRes video recording it is instead supported with quality up to 4K at 60 frames per second on both internal and external memory.
Apple doesn’t mention this information on the iPhone 15 Pro’s tech specs page on its website, but the limitation is listed when you compare the iPhone 15 Pro to another iPhone model in the Apple Store app.
The same limitation applies to iPhone 13 Pro and iPhone 14 Pro models with 128GB of storage, but these devices can’t record ProRes video to external storage, so users who choose the iPhone 15 Pro this time have at least one option . The limitation doesn’t apply to the iPhone 15 Pro Max, as that model starts with 256GB of storage.
THE ProRes video files are very large. Apple says a one-minute 10-bit ProRes video is about 1.7GB in 1080p and 6GB in 4K. Apple likely feels that offering 4K ProRes video recording to internal storage on the 128GB model would offer a poor user experience. With recording to an external storage device as an option, the problem is less noticeable.
Introduced on the iPhone 13 Pro models, ProRes is part of a family of Apple codecs that can compress video into smaller file sizes with “impressive preservation of image quality.” Apple says ProRes is designed as the final saving format for high-quality videos such as commercials, feature films and broadcasts.
ProRes video recording is not yet supported on the standard iPhone 15 and iPhone 15 Plus.
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