Static kVTCompressionPropertyKey_SupportsBaseFrameQP 

pub unsafe static kVTCompressionPropertyKey_SupportsBaseFrameQP: &'static CFString

Available on crate feature VTCompressionProperties only.

This property can be queried to determine if the encoder supports base frame QP requests.

If this property returns kCFBooleanTrue, it indicates that the encoder supports base frame QP requests through kVTEncodeFrameOptionKey_BaseFrameQP. If it returns false or kVTPropertyNotSupportedErr, base frame QP requests will cause errors on VTCompressionSessionEncodeFrame calls, or will be ignored.

See also Apple’s documentation