Static kVTCompressionPropertyKey_ReferenceBufferCount 

pub unsafe static kVTCompressionPropertyKey_ReferenceBufferCount: &'static CFString

Available on crate feature VTCompressionProperties only.

The client will be able to control the the maximum allowed ReferenceBufferCount using this optional key.

This is typically used to force the encoder to use lower count than allowed by the stantard for a level/profile. The encoder will fail and report an error if the requested value exceeds the limit set by the standard for such a level/profile.

See also Apple’s documentation