我有录制应用程序实现,用户可以点击“录制”按钮开始/停止录制。我通过将GPUImageVideoCamera
输出设置为 aGPUImageView
和a 的基本来实现这一点GPUImageMovieWriter
。
50% 的情况下,录制的剪辑会在两端出现一对(或单个)黑框,有时两者都有。实现相当简单,但无论如何都是这样。
gpuImageView = [[GPUImageView alloc] initWithFrame:cameraView.frame];
gpuImageView.fillMode = kGPUImageFillModePreserveAspectRatioAndFill;
[cameraView addSubview:gpuImageView];
videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPresetHigh cameraPosition:(usingBackCamera) ? AVCaptureDevicePositionBack : AVCaptureDevicePositionFront];
[videoCamera addTarget:gpuImageView];
[videoCamera addTarget:movieWriter];
videoCamera.audioEncodingTarget = movieWriter;
[videoCamera startCameraCapture];
double delayToStartRecording = 0.5;
dispatch_time_t startTime = dispatch_time(DISPATCH_TIME_NOW, delayToStartRecording * NSEC_PER_SEC);
dispatch_after(startTime, dispatch_get_main_queue(), ^(void){
NSLog(@"Start recording");
[movieWriter startRecording];
});
然后使用以下命令停止录制(同时实时摄像机继续显示在GPUImageView
.
[movieWriter finishRecording];
有没有其他人经历过这种情况和/或找到避免黑框的解决方案?我无法暂停/恢复相机拍摄,以确保无缝的用户体验。