AVCaptureSession视频定向iOS
我正在使用AVCaptureSession捕获视频。问题是我不理解视频定位背后的全部逻辑。我设置视频方向如下:AVCaptureSession视频定向iOS,ios,avfoundation,avplayer,avcapturesession,avmutablecomposition,Ios,Avfoundation,Avplayer,Avcapturesession,Avmutablecomposition,我正在使用AVCaptureSession捕获视频。问题是我不理解视频定位背后的全部逻辑。我设置视频方向如下: AVCaptureConnection *captureConnection = [self.movieFileOutput connectionWithMediaType:AVMediaTypeVideo]; [captureConnection setVideoOrientation:AVCaptureVideoOrientationPortrait]; 因此,我录制了视频并向用
AVCaptureConnection *captureConnection = [self.movieFileOutput connectionWithMediaType:AVMediaTypeVideo];
[captureConnection setVideoOrientation:AVCaptureVideoOrientationPortrait];
因此,我录制了视频并向用户显示预览,但视频方向始终是横向的。我需要它永远是肖像。
我在SO上发现了一些类似的问题,但没有找到解决方案
我用来录制视频的代码:
AVCaptureSession *session = [[AVCaptureSession alloc] init];
self.captureSession = session;
AVCaptureDevice *VideoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if (VideoDevice)
{
NSError *error;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:VideoDevice error:&error];
self.videoInputDevice = input;
if (!error)
{
if ([self.captureSession canAddInput:self.videoInputDevice])
[self.captureSession addInput:self.videoInputDevice];
}
}
AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
NSError *error = nil;
AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error];
if (audioInput)
[self.captureSession addInput:audioInput];
[self.previewLayer removeFromSuperlayer];
self.previewLayer = nil;
[self setPreviewLayer:[[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession]];
[self.previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
self.movieFileOutput = movieFileOutput;
Float64 TotalSeconds = kDefaultRecordingTime;
int32_t preferredTimeScale = 30;
CMTime maxDuration = CMTimeMakeWithSeconds(TotalSeconds, preferredTimeScale);
self.movieFileOutput.maxRecordedDuration = maxDuration;
self.movieFileOutput.movieFragmentInterval = kCMTimeInvalid;
self.movieFileOutput.minFreeDiskSpaceLimit = 1024 * 1024;
if ([self.captureSession canAddOutput:self.movieFileOutput])
[self.captureSession addOutput:self.movieFileOutput];
[self.captureSession setSessionPreset:AVCaptureSessionPresetMedium];
if ([self.captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720])
[self.captureSession setSessionPreset:AVCaptureSessionPreset1280x720];
CGRect layerRect = [self.recordingView bounds];
[self.previewLayer setBounds:layerRect];
[self.previewLayer setPosition:CGPointMake(CGRectGetMidX(layerRect),
CGRectGetMidY(layerRect))];
[self.recordingView.layer addSublayer:self.previewLayer];
[self.recordingView bringSubviewToFront:self.recordButton];
[self.recordingView bringSubviewToFront:self.frontCameraButton];
AVCaptureConnection *captureConnection = [self.movieFileOutput connectionWithMediaType:AVMediaTypeVideo];
[captureConnection setVideoOrientation:AVCaptureVideoOrientationPortrait];
[self.captureSession commitConfiguration];
[self.captureSession startRunning];
然后我录制了另一个视频,并使用AVMutableComposition进行混合。但我所有的视频都是水平旋转的。我不做任何旋转,当混合它与avmutablecomposition
我真的很感激如果有人能告诉我怎么做,或者甚至看到代码中的错误,我真的很感激。提前谢谢 只需尝试以下方法即可解决定位问题: 首先,从代码中删除这两行:
AVCaptureConnection *captureConnection = [self.movieFileOutput connectionWithMediaType:AVMediaTypeVideo];
[captureConnection setVideoOrientation:AVCaptureVideoOrientationPortrait];
现在,在同一位置添加此代码:
AVCaptureConnection *videoConnection = nil;
for ( AVCaptureConnection *connection in [movieFileOutput connections] )
{
NSLog(@"%@", connection);
for ( AVCaptureInputPort *port in [connection inputPorts] )
{
NSLog(@"%@", port);
if ( [[port mediaType] isEqual:AVMediaTypeVideo] )
{
videoConnection = connection;
}
}
}
if([videoConnection isVideoOrientationSupported]) // **Here it is, its always false**
{
[videoConnection setVideoOrientation:[[UIDevice currentDevice] orientation]];
}
编辑:
- 最后添加我的代码
我希望它能起作用。@Mayur我已经检查过了,并且已经尝试过了这方面的一切,但都没有用。似乎无论我设置什么,我的录音都是水平旋转的。我在用AVMutableComposition创作曲目时试图设置方向。你是在纵向模式下拍摄视频吗?@Mayur是的,我是在纵向模式下拍摄的。然后我用AVMutableComposition添加音乐,非常简单的东西,没有旋转或任何东西。但我的视频是水平的。我将它保存到iphone并发送到我的mac电脑,在mac电脑上也是一样的。水平旋转。已经三天了:/请检查我的答案仍然是一样的:/@Lukas做最后一次尝试&尝试在这行[self.captureSession startRunning]之后添加我的代码@卢卡斯:看起来这是个关键问题。我必须在设备上试用。我为此选择了不同的库,无法解决:/