Iphone 同时使用AVCaptureSession和AVAudioPlayer
我能够录制视频并正确地将电影输出到文件中。但是,我在尝试使用AVAudioPlayer播放一些音频时遇到了视频录制问题(没有视频输出)。这是否意味着我不能同时使用AVCaptureSession和AVAudioPlayer?下面是我创建捕获会话和播放音频的代码。首先开始视频捕获,然后在捕获过程中,我想播放一些音频。非常感谢你的帮助 创建捕获会话以录制视频(带音频)的代码-输出到.mov文件:Iphone 同时使用AVCaptureSession和AVAudioPlayer,iphone,ios,ipad,avfoundation,Iphone,Ios,Ipad,Avfoundation,我能够录制视频并正确地将电影输出到文件中。但是,我在尝试使用AVAudioPlayer播放一些音频时遇到了视频录制问题(没有视频输出)。这是否意味着我不能同时使用AVCaptureSession和AVAudioPlayer?下面是我创建捕获会话和播放音频的代码。首先开始视频捕获,然后在捕获过程中,我想播放一些音频。非常感谢你的帮助 创建捕获会话以录制视频(带音频)的代码-输出到.mov文件: - (void)addVideoInput AVCaptureDevice *audioDevi
- (void)addVideoInput
AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
//... also some code for setting up videoDevice/frontCamera
NSError *error;
AVCaptureDeviceInput *videoIn = [AVCaptureDeviceInput
deviceInputWithDevice:frontCamera error:&error];
AVCaptureDeviceInput *audioIn = [AVCaptureDeviceInput
deviceInputWithDevice:audioDevice error:&error];
if (!error) {
if ([captureSession canAddInput:audioIn])
[captureSession addInput:audioIn];
else
NSLog(@"Couldn't add audio input.");
if ([captureSession canAddInput:videoIn])
[captureSession addInput:videoIn];
else
NSLog(@"Couldn't add video input.");
}
- (void)addVideoOutput
{
AVCaptureMovieFileOutput *m_captureFileOutput = [[AVCaptureMovieFileOutput alloc] init];
[captureSession addOutput:m_captureFileOutput];
[captureSession startRunning];
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSMutableString *filePath = [NSMutableString stringWithString:@"Movie.mov"];
NSString* fileRoot = [docDir stringByAppendingPathComponent:filePath];
NSURL *fileURL = [NSURL fileURLWithPath:fileRoot];
AVCaptureConnection *videoConnection = NULL;
for ( AVCaptureConnection *connection in [m_captureFileOutput connections] )
{
for ( AVCaptureInputPort *port in [connection inputPorts] )
{
if ( [[port mediaType] isEqual:AVMediaTypeVideo] )
{
videoConnection = connection;
}
}
}
[videoConnection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
[m_captureFileOutput startRecordingToOutputFileURL:fileURL recordingDelegate:self];
[m_captureFileOutput release];
}
用于播放音频的代码,此函数在视频捕获会话期间调用。如果我不调用此函数,视频将被录制,并且我可以保存到.mov文件中。但是,如果调用此函数,则没有输出.mov文件
- (void)playAudio
{
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"AudioFile" ofType:@"mp3"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];
AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
[fileURL release];
self.audioPlayer = newPlayer;
[newPlayer release];
[audioPlayer setDelegate:self];
[audioPlayer prepareToPlay];
[audioPlayer play];
}
我通过设置音频会话解决了这个问题。在创建音频播放器对象以播放音频之前,我调用了以下函数。这样,我就可以同时录制视频(带音频)和播放音频
- (void)setupAudioSession {
static BOOL audioSessionSetup = NO;
if (audioSessionSetup) {
return;
}
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
UInt32 doSetProperty = 1;
AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty);
[[AVAudioSession sharedInstance] setActive: YES error: nil];
audioSessionSetup = YES;
}
- (void)playAudio
{
[self setupAudioSession];
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"AudioFile" ofType:@"mp3"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];
AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
[fileURL release];
self.audioPlayer = newPlayer;
[newPlayer release];
[audioPlayer setDelegate:self];
[audioPlayer prepareToPlay];
[audioPlayer play];
}
嗨,HappyAppDeveloper,我被困在同一个问题上。我在setupAudioSession中执行相同的初始化,但捕获会话始终停止。你知道iOS6是否出现这种情况吗?如果你使用的是ARC,音频播放器必须声明为“强”。否则它可能会提前发布,您将无法获得任何声音。谢谢,它成功了。此外,我还必须将AudioToolbox框架添加到我的项目中。