相关疑难解决方法(0)

我正在尝试更改摄像机视图Front和.Back它运行良好Pause/Record.如果Flip Camera View录制的视频没有翻转选项它工作正常.但如果我们曾经,那么进一步录制视频不保存导致AVAssetWriterStatusFailed- The operation could not be completed.任何人都可以帮我找到我出错的地方吗？以下是我的代码.

Camera.m

- (void)flipCamera{
NSArray * inputs = _session.inputs;
for ( AVCaptureDeviceInput * INPUT in inputs ) {
    AVCaptureDevice * Device = INPUT.device ;
    if ( [ Device hasMediaType : AVMediaTypeVideo ] ) {
        AVCaptureDevicePosition position = Device . position ; AVCaptureDevice * newCamera = nil ; AVCaptureDeviceInput * newInput = nil ;
        if ( position == AVCaptureDevicePositionFront )
            newCamera = …

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