AVCaptureConnection冻结我的第二个呼叫

的应用程序，这是我的代码冻结我的应用程序AVCaptureConnection冻结我的第二个呼叫

AVCaptureConnection *videoConnection = [videoOutput connectionWithMediaType:AVMediaTypeVideo]; 


if ([videoConnection isVideoOrientationSupported]) 
{ 
    [videoConnection setVideoOrientation:AVCaptureVideoOrientationPortrait]; 

}

这是我videoOutput初始化

// Setup video capture 
videoInput = [[AVCaptureDeviceInput deviceInputWithDevice: front? frontVideoDevice: rearVideoDevice error: &error] retain]; 
videoOutput = [[AVCaptureVideoDataOutput alloc] init]; 
[videoOutput setAlwaysDiscardsLateVideoFrames: YES]; 
// Set the video output to store frame in BGRA (It is supposed to be faster) 
NSString* key = (NSString*)kCVPixelBufferPixelFormatTypeKey; 
NSNumber* value = [NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA]; 
NSDictionary* videoSettings = [NSDictionary dictionaryWithObject:value forKey:key]; 
[videoOutput setVideoSettings:videoSettings];

当我在第二次我的应用程序停止初始化会话回应但如果我删除avcaptureconnection的代码一切都很好

？

来源

2012-06-24 Janub

我认为它是一个内存管理问题。你可以通过调试器检查第二次调用它时是否有一个有效的对象'videoOutput'？你能发布确切的错误消息吗？ – Pfitz

我得到没有错误，这是问题，并正确分配videoOutput。但现在我注意到我得到了AVCaptureSessionRuntimeErrorNotification。 – Janub

您是否设置了异常断点？ – Pfitz

...！

我叫 [session startRunning] 前

AVCaptureConnection *videoConnection = [videoOutput connectionWithMediaType:AVMediaTypeVideo]; 


if ([videoConnection isVideoOrientationSupported]) 
{ 
    [videoConnection setVideoOrientation:AVCaptureVideoOrientationPortrait]; 

}

我的坏:)

来源

2012-06-24 09:27:29 Janub

AVCaptureConnection冻结我的第二个呼叫

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