How to USE iphone16 pro to capture HDR dolby_vision and use videotoolbox to encode with dolby_vision metadata in bitstream!

Hi stevezhang, Yes, you can capture dolby vision metadata into movies so long as they are captured from 10-bit HDR video formats. When you record with AVCaptureMovieFileOutput, it automatically inserts dolby vision metadata into the track. But if using AVCaptureVideoDataOutput + AssetWriter, you can use a combination of the preservesDynamicHDRMetadata property on the video data output + kVTCompressionPropertyKey_PreserveDynamicHDRMetadata on the VTCompressionSession to preserve HDR metadata.