Not able to get video thumbnail using normal approach when play from Data

[ghost]

Dear Team,

Thank you for your work. Your repository helps us a lot.
We used the CachingPlayerItem to play from Data. However, it is not able to get a thumbnail from the video using the normal approach. Please advise, thank you.

Assuming "playerItem" is a CachingPlayerItem initialized from Data
Normal Approach:
let player = AVPlayer(playerItem: playerItem)
let asset = player.currentItem?.asset ?? AVAsset()
let imageGenerator = AVAssetImageGenerator(asset: asset)
then I should be able to get a CGImage from imageGenerator.copyCGImage(at: .zero, actualTime:nil)

Waiting for your reply