Static kCVPixelBufferProResRAWKey_MetadataExtension 

pub unsafe static kCVPixelBufferProResRAWKey_MetadataExtension: &'static CFString

Available on crate feature CVPixelBuffer only.

Buffer attachment key for metadata extension.

Associated attachment is CFData containing ProRes RAW metadata extension. This attachment is optional for buffers with either bp16 or bp64. The CFData contains a big-endian uint32 representing the size of the item in bytes followed by a 4-character code (‘psim’) followed by a variable-length pascal string identifying the metadata (like a key string) followed by the metadata payload.

See also Apple’s documentation