The number of media read requests from the server to this client.
- iOS 6.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
For HTTP live streaming, this property contains the count of media requests downloaded from the server. For progressive-style HTTP media downloads, it contains a count of HTTP
GET (byte-range) requests for the resource.
The property corresponds to “sc-count".
The value of this property is negative if unknown.
This property is not compatible with Key-value observing.