Hi everyone, I'm developing an iOS camera app that aims to record 4224×3024 Open Gate video at 60fps in 10-bit HEVC with Apple Log 2. Native Apple ISP-processed Apple Log 2 capture works at 3840×2160/60fps. However, at 4224×3024/60fps, the tested capture configuration only provides Bayer RAW (btp2). I've successfully decoded ProRes RAW using Apple's decoder into linear Rec.2020 and applied the published Apple Gamut and Apple Log 2 transforms. However, the resulting chroma is only approximately 72–74% of the native ISP output in controlled color-chart comparisons. I've also confirmed that VTRAWProcessingSession and related RAW processing controls are not publicly available to iOS apps in the iPhoneOS 27.0 SDK. My questions are: Is there a public iOS API that applies the same color and tone rendering as Apple's native camera ISP to captured Bayer RAW or ProRes RAW? Is there a supported configuration for obtaining full-resolution 4224×3024/60fps ISP-processed Apple Log 2 output (x420 or x422), without preview proxies or upscaling? If neither is supported, what is Apple's recommended approach? Is this a hardware limitation or a public API limitation? The goal is to use Apple's official color processing pipeline without empirically fitted matrices, LUTs, or arbitrary color corrections. Any guidance would be greatly appreciated. Thank you!

Hello, I'm developing a video application for Apple platforms and would like to implement accurate Apple Log and Apple Log 2 color conversion using official Apple APIs. Final Cut Pro and Final Cut Camera support SDR Rec.709 and HDR Rec.2020 HLG monitoring. I have found Apple's official Apple Log white papers and Rec.709 LUTs, but I could not find an official HDR HLG LUT or a public API that provides equivalent color conversion. I have three questions: Does Apple provide a public API through AVFoundation, Core Image, ColorSync, or another framework to convert Apple Log / Apple Log 2 to SDR Rec.709 and HDR Rec.2020 HLG? Are the color transformations used by Final Cut Pro and Final Cut Camera available to third-party developers, either through public APIs or official LUT resources? If no such API exists, is implementing the transfer functions and gamut conversions from Apple's white papers, followed by standard SDR/HDR rendering, the recommended approach? My goal is to preserve the original Apple Log footage while allowing independent SDR/HDR monitoring without modifying the recorded data. Any guidance, documentation, or sample code from Apple engineers would be greatly appreciated. Thank you!