Static kVTDecodeFrameOptionKey_ContentAnalyzerRotation 

pub unsafe static kVTDecodeFrameOptionKey_ContentAnalyzerRotation: &'static CFString

Available on crate feature VTDecompressionProperties only.

Clockwise rotation (one of 0, 90, 180, 270) to be applied for proper display orientation.

This value is used for content analysis to properly orient the image before analysis. The value should be a CFNumber with values of 0, 90, 180, or 270, representing degrees of clockwise rotation. This key is not used unless you have attached a SCVideoStreamAnalyzer to the decompression session.

See also Apple’s documentation