更改在游乐场,下面的代码初始化数据使用UnsafeBufferPointer,如在Apple Foundation Documentation let data = Data()
let test = Array(0..<10)
let pointer = UnsafeRawPointer(test).assumingMemoryBound(to: UInt8.self)
data = Da
我想将一些信息保存到视频元数据中。现在我可以保存文本,即String对象。 // this works well
let metaItem = AVMutableMetadataItem()
metaItem.key = AVMetadataCommonKeySource as NSCopying & NSObjectProtocol
metaItem.keySpace = AVMetada