ios - 在多个分区中拆分视频

Question

我在 Objective-C 中开发 iOS 应用程序。

根据我的要求，我想将视频分成多个部分。

假设我有一个 50 秒的视频，我想将它分成 5 个部分，每个部分 10 秒。

如果你们有任何想法，请告诉我。

Answer 1

@MilanPatel 答案的 Swift 5 版本，我发现它非常有用:

func splitSecondVideo() {
   
        guard did<splitdivide else {return}
        guard let videourl = URL(string: "YOUR_VIDEO_URL_HERE") else {return}
        let asset = AVURLAsset(url: videourl, options: nil)

        let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetHighestQuality)

        let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).map(\.path)
        let documentsDirectory = paths[0]
        var myPathDocs: String?
        var starttime: CMTime
        var duration: CMTime

        myPathDocs = URL(fileURLWithPath: documentsDirectory).appendingPathComponent("SplitFinalVideo\(did).mov").path
        let endt = CMTimeGetSeconds(asset.duration)
        print("All Duration : \(endt)")
        let divide = CMTimeGetSeconds(asset.duration) / splitdivide
        print("All Duration : \(divide)")

        starttime = CMTimeMakeWithSeconds(Float64(divide * did), preferredTimescale: 1)
        duration = CMTimeMakeWithSeconds(Float64(divide), preferredTimescale: 1)

        let fileManager = FileManager()
        var error: Error?
        if fileManager.fileExists(atPath: myPathDocs ?? "") == true {
            do {
                try fileManager.removeItem(atPath: myPathDocs ?? "")
            } catch {
            }
        }

        exportSession?.outputURL = URL(fileURLWithPath: myPathDocs ?? "")
        exportSession?.shouldOptimizeForNetworkUse = true
        exportSession?.outputFileType = .mov
        // Trim to half duration

        let secondrange = CMTimeRangeMake(start: starttime, duration: duration)

        exportSession?.timeRange = secondrange
        exportSession?.exportAsynchronously(completionHandler: { [self] in
            exportDidFinish(exportSession)
            did += 1
            self.splitSecondVideo()

        })
  
}

func exportDidFinish(_ session: AVAssetExportSession?) {
    if session?.status == .completed {
        let outputURL = session?.outputURL
        print("Before Exported")
        saveVideoAtPath(with: outputURL)
    }
}

另一个更新:session?.status 总是失败。为了解决这个问题，我补充说:

 asset.resourceLoader.setDelegate(self, queue: .main)

并符合 AVAssetResourceLoaderDelegate 协议(protocol)并开始工作。感谢this answer通过@panychyk.dima