I need to correctly determine the mime type of keynote file and numbers file without relying on the extension. For this purpose, I am hoping to use the magic number concept and match it with the first four bytes of a file. Link for magic number understanding -> [https://www.outsystems.com/forge/component-overview/10108/validate-file-extension#:~:text=A%20magic%20number%20is%20a,types%20which%20is%20hexadecimal%20format.] Though after extensive searching online I am unable to find a unique magic number for the above files moreover first four bytes of the file is matching with the magic number of the zip file due to which I am getting the wrong extension as zip. This is the first four bytes 0x50, 0x4B, 0x3, 0x4. Is there any reliable way to find the mime type of these files without relying on an extension?

We have created a hls playback framework and lot of our client's are complaining about this error {"code": -19152, "domain": "CoreMediaErrorDomain", "localizedDescription": "The operation couldn’t be completed. (CoreMediaErrorDomain error -19152 - The operation couldn’t be completed. (CoreMediaErrorDomain error -19152.))", "localizedFailureReason": "", "localizedRecoverySuggestion": ""} We are unable to reproduce this issue on our end but we have data reflecting the same error happening at good rate. Any help/hint is welcome. Thanks

Hello everyone, I have captured SPC and CKC messages. I'm trying to parse it using verify_ckc tool, but I only get SPC encryption key and SPC encryption IV: CKC/SPC Sanity Test v. 2.01 ========================= Begin SPC Data =============================== SPC container size 7296 SPC Encryption Key - a9 a6 8c 2b 62 2f 3a ee bc 92 0c 4d cb 07 d1 c7 SPC Encryption IV - 75 7f f7 60 c9 d0 16 2a 7b 96 0e 42 e6 c3 3e 75 ================ SPC TLLV List ================ =========================== End SPC Data ================================= =========================== Begin CKC Data ================================= =========================== End CKC Data ================================= SPC binary message: https://www.icloud.com/iclouddrive/0c0hm06RJQpTlsWBB1ANb3OZw#SPC CKC binary message: https://www.icloud.com/iclouddrive/016apmD_MZDFaGVNey_HA_17g#CKC What is the problem?

Hi, is it possible to force/ensure an automatic license renewal in a Fairplay SPC response? I can find that feature in other DRM systems like Widevine (using specific parameters in the response) Searching in "FairPlay Streaming Server SDK 4.4.4" I can only find parameters related to lease/rental TLLs, but not an explicit renewal request. does this feature exists on FairPlay? Any information will be appreciated. Have a great day!

I need to download encrypted HLS stream in tvos and save it in local file path. But AVAssetDownloadURLSession is not available in tvOS. Is there any alternative?. Thanks

Hello There, Can the SAME FairPlay Certificate be used by two providers simultaneously without impacting each other? For example, we already have a DRM Providers using our FairPlay Certificate in Production. We are now planning to migrate to another DRM Provider for part of the traffic/channels in parallel with Production. This means, in Production, at the same time, 2 DRM providers would be using the SAME FairPlay Certificate. Kindly let us know if this will create any potential issues with the Encrypted Contents that use the Certificate. Is there any impact on the final user in the iOS/tvOS applications with two DRM providers using the same FairPlay certificate?