Static kVTCompressionPropertyKey_ProfileLevel 

pub unsafe static kVTCompressionPropertyKey_ProfileLevel: &'static CFString

Available on crate feature VTCompressionProperties only.

Specifies the profile and level for the encoded bitstream.

Available profiles and levels vary across formats and between video encoders. Video encoders should use standard keys where available, and follow standard patterns where not.

See also Apple’s documentation