We maintain an existing iOS/tvOS App Store application that uses AVFoundation for authenticated streaming playback. One upstream provider supplies some account-entitled playback sessions as fragmented MP4 using ISO Common Encryption scheme cenc (AES-CTR). The provider controls the rendition, and no corresponding cbcs rendition is available to our client. We understand that Apple’s documented FairPlay Streaming path supports cbcs. We identified com.apple.coremedia.allow-mpeg4streaming as relevant to this playback case, but the entitlement is undocumented and does not appear under Capability Requests for our App ID. Apple Developer Support was unable to identify the request process and recommended posting this question in the forums and filing Feedback Assistant report FB24649355. Could an Apple engineer clarify: Is this entitlement available to third-party iOS/tvOS applications? If so, what is the official request process? We can provide additional technical information privately if an Apple engineer needs it.

In my AVContentKeySession, I'm interested in providing initializationData and options: ["InitializationDataType": "sinf"] or "cenc" to my call to processContentKeyRequest. When I call something like this: let contentId = "data:text/plain;charset=utf-8, ... " let initData = "{ \"sinf\" : [\"AAAADGZyb....AAAAAAAA\"] }".data(using: String.Encoding.utf8) keyLoader.contentKeySession.processContentKeyRequest(withIdentifier: contentId, initializationData: initData, options: ["InitializationDataType": "sinf"]) the delegate is invoked and I receive a license response from my server. However, I'm either confused or unaware of how one would handle specifying those parameters from the ResourceLoaderDelegate. The resource loader delegate is triggering on the EXT-X-KEY URI in my manifest. When I set the content type in the resource loader for that load request like so: loadingRequest.contentInformationRequest?.contentType = AVStreamingKeyDeliveryContentKeyType loadingRequest.finishLoading() return true It seems to call processContentKeyRequest for me (in addition to my own call). But there is no way to specify initializationData or options. However, I can see that the contentId is provided the resource loader's AVContentKeyRequest. I know my manifest/keys/licenses "can" work as I wrote a test web page using safari EME. I am able to stream and receive valid licenses using the the mediaKey session's generateRequest where I can specify the initDataType and initData. I'm simply trying to replicate that somehow using AVContentKeySession. I am more familiar with DASH and newer to HLS, so I'm probably confused about somthing but hoping to get pointed in the right direction here. But I am questioning if initializationData and options for processContentKeyRequest is properly supported or not?