> On 18 Sep 2019, at 15:27, Derek Buitenhuis <[email protected]> wrote: > > On 18/09/2019 10:30, Hello Vectronic wrote: >> I need to implement support for reading and writing ICC profiles which can >> be stored in MOV/MP4 sample descriptor colour information. > > Does anything exist that can even consume or produce these sorts of files? > > I looked a while back, and found literally nothing that could support these. > > - Derek
It is possible to write and read this with VideoToolbox: https://developer.apple.com/documentation/videotoolbox/kvtcompressionpropertykey_iccprofile?language=objc Here is a snippet of Swift code showing usage: VTCompressionSessionCreate( allocator: nil, width: Int32(width), height: Int32(height), codecType: codec, encoderSpecification: encoderSpecification, imageBufferAttributes: sourceImageBufferAttributes, compressedDataAllocator: nil, outputCallback: outputCallback, refcon: Unmanaged.passUnretained(self).toOpaque(), compressionSessionOut: compressionSesionOut) VTSessionSetProperties(vtCompressionSession, propertyDictionary: [ kVTCompressionPropertyKey_ICCProfile: colorSpace.copyICCData() as CFTypeRef, kVTCompressionPropertyKey_MaxKeyFrameInterval: NSNumber(value: 50) ] as CFDictionary) And here is an example file: http://vectronic.io/icc-profile/icc-profile.mov And here is the relevant standard: https://standards.iso.org/ittf/PubliclyAvailableStandards/c068960_ISO_IEC_14496-12_2015.zip _______________________________________________ ffmpeg-devel mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
