Static kVTCompressionPropertyKey_TransferFunction 

pub unsafe static kVTCompressionPropertyKey_TransferFunction: &'static CFString

Available on crate feature VTCompressionProperties only.

Indicates transfer function for compressed content.

Some video encoders may enforce specific colorimetry; in those cases this property will be read-only (SetProperty will return kVTPropertyReadOnlyErr). The value will be set on the format description for output sample buffers.

See also Apple’s documentation