I have a FairPlay-encrypted HLS stream. I already fetched the CKC, provided the AVContentKeyRequest with it, and played the decrypted video in an AVPlayer.
I now want to generate scrubbing thumbnails using the AVAssetImageGenerator. The manifest references an I-Frame playlist that has the same #EXT-X-KEY tag as the video playlist.
I assumed that I could use the same AVURLAsset and it would work out of the box since it is already linked with the contentKeySession. Unfortunately, it doesn't.
I already tried to respond with the same CKC in resourceLoader(_:shouldWaitForLoadingOfRequestedResource). The delegate function is called with the correct asset id but it doesn't work either and I don't know how to retrieve error messages.
Does anyone know or already managed to get AVAssetImageGenerator running with FPS? Thank you!:)
Note: The thumbnail generation does work when using AVPlayerViewController.
I've reached out to Apple Developer Support:
AVAssetImageGenerator does not work for encrypted content.
Instead, another AVPlayer should be used with an AVPlayerLayer of the desired thumbnail size.