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概述:
常见的输出信号:
AVCaptureMovieFiLeoutput输出流实现视频录制
初始化会话层
-(void)sessionConfiguration{ //初始化一个会话 session = [[AVCaptureSession alloc] init]; [session setSessionPreset:AVCaptureSessionPresetMedium]; //创建视频设备 AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; //根据设备创建输入信号 deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:nil]; //添加 输出设备 movieFile self.deviceMovieFiLeoutput = [[AVCaptureMovieFiLeoutput alloc] init]; [session beginConfiguration]; //session添加设备输入信号 if ([session canAddInput:deviceInput]) { [session addInput:deviceInput]; } //session添加设备输出信号 if ([session canAddOutput:self.deviceMovieFiLeoutput]) { [session addOutput:self.deviceMovieFiLeoutput]; } [session commitConfiguration]; }
创建预览图层
-(void)embedLayerWithView:(UIView *)view{ if (session == nil) { return; } videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session]; //设置图层的大小 videoPreviewLayer.frame = view.bounds; videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; [view.layer addSublayer:videoPreviewLayer]; [session startRunning]; }
录制视频
-(void)takePhoto:(NSURL *)fileURL{ [self.deviceMovieFiLeoutput startRecordingToOutputFileURL:fileURL recordingDelegate:self]; }
结束录制
-(UIImageView *)finishRecord:(UIView *)view isAnewRecording:(BOOL)anewRecording{ gifImageView = [[UIImageView alloc] initWithFrame:view.bounds]; [view addSubview:gifImageView]; isAnewRecording = anewRecording; //存储是否重新录制 //停止录制(停止录制后做代理方法) [self.deviceMovieFiLeoutput stopRecording]; return gifImageView; }
拍摄视频保存路径
+(NS@R_607_10495@ng *)getVideoSaveFilePath{ NS@R_607_10495@ng*documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES) lastObject]; NS@R_607_10495@ng *filePath = [documentPath @R_607_10495@ngByAppendingPathComponent:@"video.mp4"]; return filePath; }
会话层启动和关闭
-(void)startCamera{ [session startRunning]; } -(void)stopCamera{ [session stopRunning]; }
代理方法
- (void)captureOutput:(AVCaptureFiLeoutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{ NSLog(@"完成录制"); NSLog(@"outputFileURL = %@",outputFileURL); //**重新录制**// if (isAnewRecording) { //**删除视频文件**// NSFileManager *manager = [NSFileManager defaultManager]; [manager removeItemAtPath:outputFileURl.absolute@R_607_10495@ng error:nil]; } //**不取消录制**// else{ //**获取视频时长**// AVURLAsset *avUrl = [AVURLAsset URLAssetWithURL:outputFileURL options:nil]; CMTime time = [avUrl duration]; int seconds = ceil(time.value/time.timescalE); NSLog(@"seconds = %d",seconds); if ([self.delegate respondsToSELEctor:@SELEctor(videoDuration:)]) { [self.delegate videoDuration:seconds]; } if ([self.delegate respondsToSELEctor:@SELEctor(playerVideo:)]) { [self.delegate playerVideo:outputFileURl.absolute@R_607_10495@ng]; } } }
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