我正在尝试同时录制和播放视频。使用AVFoundation是否可能?目前,只要我不录制音频,我就能做到这一点。一旦我将音频输入添加到AVCaptureSession并重新启动整个过程,我就会收到“AVCaptureSessionWasInterruptedNotification”而且录制停止。
以下是我的视频播放方式。
MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:path]];
[moviePlayer.view setFrame:self.playerView.bounds];
moviePlayer.useApplicationAudioSession=NO;
self.player = moviePlayer;
[moviePlayer release];
[self.playerView addSubview:player.view];
[player play];
这是我录制视频的方法:
NSError *error;
AVCamCaptureManager *captureManager = [[AVCamCaptureManager alloc] init];
if ([captureManager setupSessionWithPreset:AVCaptureSessionPresetLow error:&error])
{
[self setCaptureManager:captureManager];
AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[captureManager session]];
self.captureVideoPreviewLayer= previewLayer;
UIView *view = [self cameraView];
CALayer *viewLayer = [view layer];
[viewLayer setMasksToBounds:YES];
CGRect bounds = [view bounds];
[captureVideoPreviewLayer setFrame:bounds];
if ([captureVideoPreviewLayer isOrientationSupported])
[captureVideoPreviewLayer setOrientation:AVCaptureVideoOrientationPortrait];
[captureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
[[captureManager session] startRunning];
[self setCaptureVideoPreviewLayer:captureVideoPreviewLayer];
if ([[captureManager session] isRunning])
{
[captureManager setOrientation:AVCaptureVideoOrientationPortrait];
[captureManager setDelegate:self];
[viewLayer insertSublayer:captureVideoPreviewLayer below:[[viewLayer sublayers] objectAtIndex:0]];
NSString *countString = [[NSString alloc] initWithFormat:@"%d", [[AVCaptureDevice devices] count]];
NSLog(@"Device count: %@",countString);
} else {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Failure"
message:@"Failed to start session."
delegate:nil
cancelButtonTitle:@"Okay"
otherButtonTitles:nil];
[alertView show];
[alertView release];
}
} else {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Input Device Init Failed"
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:@"Okay"
otherButtonTitles:nil];
[alertView show];
[alertView release];
}
[captureManager release];
if (![[self captureManager] isRecording]) {
[[self captureManager] startRecording];
}
我使用苹果AVCam示例代码中的"AVCamCaptureManager"。
useApplicationAudioSession
有这样的说明:“一个布尔值,指示电影播放器是否应该使用应用程序的音频会话。(在iOS 6.0中已弃用。此属性没有替代项,并且不鼓励使用它。)”默认值已经是YES
。 - qix