AVCaptureMovieFileOutput是iOS中用于录制视频的类,它提供了一种简单的方式来捕捉视频数据并将其写入文件。要裁剪AVCaptureMovieFileOutput提供的视频,可以按照以下步骤进行:
以下是一个示例代码,展示了如何裁剪AVCaptureMovieFileOutput提供的视频:
import AVFoundation
// 配置和启动摄像头捕捉会话
let captureSession = AVCaptureSession()
// 设置输入设备和输出设备...
// 创建AVCaptureMovieFileOutput实例并添加到捕捉会话
let movieOutput = AVCaptureMovieFileOutput()
captureSession.addOutput(movieOutput)
// 开始录制视频
let outputFileURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("output.mov")
movieOutput.startRecording(to: outputFileURL, recordingDelegate: self)
// 停止录制视频
movieOutput.stopRecording()
// 裁剪视频
let asset = AVAsset(url: outputFileURL)
let composition = AVMutableComposition()
let videoTrack = asset.tracks(withMediaType: .video).first!
let audioTrack = asset.tracks(withMediaType: .audio).first!
let compositionVideoTrack = composition.addMutableTrack(withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid)
let compositionAudioTrack = composition.addMutableTrack(withMediaType: .audio, preferredTrackID: kCMPersistentTrackID_Invalid)
try! compositionVideoTrack?.insertTimeRange(CMTimeRange(start: CMTime.zero, duration: CMTime(seconds: 5, preferredTimescale: 600)), of: videoTrack, at: CMTime.zero)
try! compositionAudioTrack?.insertTimeRange(CMTimeRange(start: CMTime.zero, duration: CMTime(seconds: 5, preferredTimescale: 600)), of: audioTrack, at: CMTime.zero)
// 导出裁剪后的视频
let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetHighestQuality)
exportSession?.outputFileType = .mov
exportSession?.outputURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("output_trimmed.mov")
exportSession?.exportAsynchronously(completionHandler: {
// 处理导出完成后的操作
})
请注意,上述代码仅为示例,可能需要根据实际情况进行适当的修改和错误处理。此外,裁剪视频的具体时间范围和其他参数可以根据需求进行调整。
推荐的腾讯云相关产品:腾讯云视频处理服务(云点播),用于视频的存储、处理和分发。详情请参考:腾讯云视频处理服务(云点播)
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