I have a FairPlay-encrypted HLS stream and played the video in an AVPlayer.And I want to generate scrubbing thumbnails using the AVAssetImageGenerator. Also, I am able to generate thumbnails for clear streams but get errors for protected content.
*How to generate thumbnails for protected content.
func getImageThumbnail(forTime: CMTime) {
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
generator.cancelAllCGImageGeneration()
generator.generateCGImagesAsynchronously(forTimes: [NSValue(time: forTime)]) { [weak self] requestedTime, image, actualTime, result, error in
if let error = error {
print("Error generate: \(error.localizedDescription)")
return
}
if let image = image {
DispatchQueue.main.async {
let image = UIImage(cgImage: image).jpegData(compressionQuality: 1.0)
self?.playerImg.image = UIImage(data: image!)
}
}
}
}
Hello @narendra1098, this is not possible. When an HLS stream is encrypted, AVAssetImageGenerator will not have access to decoded frames. The recommended way to build a thumbnail scrubber for encrypted content is to instantiate a second AVPlayer with an AVPlayerLayer sized to the thumbnail. In order to get it to display thumbnails, keep the player rate at zero and use seek(to:toleranceBefore:toleranceAfter:completionHandler:) to seek to the thumbnail position. Pass a finite, non-zero value for toleranceBefore and toleranceAfter. For best performance, while the user is moving the scrubber, wait for each seek to complete before issuing the next seek, to avoid overloading the network.
