我尝试创建应用程序,我可以在录制过程记录从设备不同摄像机的视频。 例如。 用户按下按钮从前方照相机“开始记录”,之后由前向后相机和记录继续5秒记录用户按下按钮“切换摄像机”和应用改变视频源。 对于相机交换台我用下面的代码:
NSError *error;
AVCaptureDeviceInput *newVideoInput;
AVCaptureDevicePosition currentCameraPosition = [[videoInput device] position];
if (currentCameraPosition == AVCaptureDevicePositionBack)
{
currentCameraPosition = AVCaptureDevicePositionFront;
}
else
{
currentCameraPosition = AVCaptureDevicePositionBack;
}
AVCaptureDevice *backFacingCamera = nil;
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices)
{
if ([device position] == currentCameraPosition)
{
backFacingCamera = device;
}
}
newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:backFacingCamera error:&error];
if (newVideoInput != nil)
{
[_captureSession beginConfiguration];
[_captureSession removeInput:videoInput];
if ([_captureSession canAddInput:newVideoInput])
{
[_captureSession addInput:newVideoInput];
videoInput = newVideoInput;
}
else
{
[_captureSession addInput:videoInput];
}
//captureSession.sessionPreset = oriPreset;
[_captureSession commitConfiguration];
}
_inputCamera = backFacingCamera;
在此之后器件的应用改变视频SOURSE和继续写下去,不过......音频/视频不同步......任何人可以hehp我解决这个问题?
谢谢。