Static kVTDecodeFrameOptionKey_ContentAnalyzerCropRectangle 

pub unsafe static kVTDecodeFrameOptionKey_ContentAnalyzerCropRectangle: &'static CFString

Available on crate feature VTDecompressionProperties only.

CGRect within the image to be used for content analysis, cropped before applying rotation.

This value specifies a rectangle within the original frame that should be used for content analysis. The cropping is applied before any rotation specified by kVTDecodeFrameOptionKey_ContentAnalyzerRotation. The value should be a CFDictionary representing a CGRect created using CGRectCreateDictionaryRepresentation(). This key is not used unless you have attached a SCVideoStreamAnalyzer to the decompression session.

See also Apple’s documentation