pub unsafe static kVTCompressionPropertyKey_MaxAllowedFrameQP: &'static CFStringAvailable on crate feature
VTCompressionProperties only.Expand description
Specifies the maximum allowed encoded frame QP (Quantization Parameter).
This is an optional parameter. Use it only when you have a specific requirement for the video quality and you are familiar with frame QP. To satisfy this requirement, the encoder may drop frames to maintain bitrate and QP goals. This is not supported in all encoders or in all encoder operating modes. kVTPropertyNotSupportedErr will be returned when this option is not supported.
See also Apple’s documentation