当我尝试在表视图中的 cellForAtIndex 中生成缩略图时，我收到此错误：
错误域= AVFoundationErrorDomain代码= -11800“操作无法完成”UserInfo = {NSUnderlyingError = 0x170843ae0 ，NSLocalizedFailureReason =发生未知错误（-308）， NSLocalizedDescription =操作无法完成}：
VideoUrl缩略图：https://google.com/abc.mp4
但如果我尝试上面给出的静态URL，它工作正常，没有任何错误 .
这是缩略图生成器代码：
/*=========================================================================
Generate Image from Video Frame
=========================================================================*/
func fetchFirstFrameOf(urlString: String,completion:@escaping (_ image:UIImage?)->()) {
var filePath = URL(string: urlString)
print(" FETCH FRAME urlString:-",urlString )
if urlString.hasPrefix("VID-") {
let path = NIDbUtility.getPath(fileName:urlString, forVideo_ImageFromMainApp: true)
print("dbPath video FETCH FRAME path:-",path )
filePath = URL(fileURLWithPath: path)
}
let asset = AVURLAsset(url: filePath!)
let imgGenerator = AVAssetImageGenerator(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
imgGenerator.requestedTimeToleranceAfter = kCMTimeZero
imgGenerator.requestedTimeToleranceBefore = kCMTimeZero
do {
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(0, 1), actualTime: nil)
let thumbnail = UIImage(cgImage: cgImage)
completion(thumbnail)
} catch let error {
print("*** Error generating thumbnail: \(error): \(urlString)")
completion(nil)
}
}
谢谢