如何将数据转换为 AVAsset？

Question

有没有办法将数据转换为 AVAsset/AVURLAsset 或更好的 AVPlayerItem？我找到了一个将数据转换为 PHAsset 的答案，需要先将其保存到桌面。有没有更好的办法？

Answer 1

由于我还没有找到一种没有临时文件的方法，根据 Elsammak 的示例，这里有一个小帮助程序类，负责删除临时文件（TemporaryMediaFile只要您使用AVAsset，临时文件就会保留在周围）当对象被释放时被删除，或者您可以.deleteFile()手动调用它）：

import Foundation
import AVKit

class TemporaryMediaFile {
    var url: URL?

    init(withData: Data) {
        let directory = FileManager.default.temporaryDirectory
        let fileName = "\(NSUUID().uuidString).mov"
        let url = directory.appendingPathComponent(fileName)
        do {
            try withData.write(to: url)
            self.url = url
        } catch {
            print("Error creating temporary file: \(error)")
        }
    }

    public var avAsset: AVAsset? {
        if let url = self.url {
            return AVAsset(url: url)
        }

        return nil
    }

    public func deleteFile() {
        if let url = self.url {
            do {
                try FileManager.default.removeItem(at: url)
                self.url = nil
            } catch {
                print("Error deleting temporary file: \(error)")
            }
        }
    }

    deinit {
        self.deleteFile()
    }
}

用法示例：

    let data = Data(bytes: ..., count: ...)

    let tempFile = TemporaryMediaFile(withData: data)
    if let asset = tempFile.avAsset {
        self.player = AVPlayer(playerItem: AVPlayerItem(asset: asset))
    }

    // ..keep "tempFile" around while it's playing..

    tempFile.deleteFile()

Answer 2

我成功做到了，这里是为任何感兴趣的人提供的。

extension Data {
    func getAVAsset() -> AVAsset {
        let directory = NSTemporaryDirectory()
        let fileName = "\(NSUUID().uuidString).mov"
        let fullURL = NSURL.fileURL(withPathComponents: [directory, fileName])
        try! self.write(to: fullURL!)
        let asset = AVAsset(url: fullURL!)
        return asset
    }
}