我在iOS 3.1.3 iPhone上测试我的iPhone应用程序.我使用以下方法选择/捕获图像UIImagePickerController:
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
[imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
[imagePicker setDelegate:self];
[self.navigationController presentModalViewController:imagePicker animated:YES];
[imagePicker release];
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
self.image = [info objectForKey:UIImagePickerControllerOriginalImage];
imageView.image = self.image;
[self.navigationController dismissModalViewControllerAnimated:YES];
submitButton.enabled = YES;
}
然后我在某个时候使用ASI类将它发送到我的Web服务器:
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:@"http://example.com/myscript.php"]];
[request setDelegate:self];
[request setStringEncoding:NSUTF8StringEncoding];
[request setShouldContinueWhenAppEntersBackground:YES];
//other post keys/values
[request setFile:UIImageJPEGRepresentation(self.image, 100.0f) withFileName:[NSString stringWithFormat:@"%d.jpg", [[NSDate date] timeIntervalSinceNow]] andContentType:@"image/jpg" forKey:@"imageFile"];
[request startAsynchronous];
问题:当我用iphone拍照同时保持它的风景时,图像会上传到服务器并按照你的预期进行查看.当拍摄手机拍照时,图像会被上传并在旋转90度时被观看.
我的应用程序设置为仅在纵向模式下工作(颠倒和常规).
如何在上传后使图像始终显示正确的方向？
UIImageView中显示的图像看起来是正确的(在拍照后直接显示),但在服务器上查看则另有说明.
这是问题所在.我正在使用AVCaptureVideoDataOutput从相机获取视频帧并使用AVAssetWriter从它们制作视频.它工作正常,但我得到的视频是颠倒的,因为我的应用程序的设备的默认方向是横向左侧,而不是像AVCaptureVideoDataOutput中默认声明的那样.我试图改变AVCaptureConnection类中的方向,但isVideoOrientationSupported总是假的,是否有可能修复它？
这是一些代码:
AVCaptureDeviceInput *captureInput = [AVCaptureDeviceInput
deviceInputWithDevice:[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]
error:nil];
/*We setupt the output*/
AVCaptureVideoDataOutput *captureOutput = [[AVCaptureVideoDataOutput alloc] init];
captureOutput.alwaysDiscardsLateVideoFrames = YES;
captureOutput.minFrameDuration = CMTimeMake(1.0, 24.0); //Uncomment it to specify a minimum duration for each video frame
[captureOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
// 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];
[captureOutput setVideoSettings:videoSettings];
/*And we create a capture session*/
self.captureSession …我有应用程序记录视频.
要处理电话轮换,我有以下代码:
// called on phone rotation
AVCaptureConnection *previewLayerConnection = [[self previewLayer] connection];
if ([previewLayerConnection isVideoOrientationSupported]) {
[previewLayerConnection setVideoOrientation:[self getVideoOrientation]];
}
和getVideoOrientation函数:
- (AVCaptureVideoOrientation) getVideoOrientation {
UIInterfaceOrientation deviceOrientation = [[UIDevice currentDevice] orientation];
AVCaptureVideoOrientation newOrientation = AVCaptureVideoOrientationPortrait;
switch (deviceOrientation) {
case UIInterfaceOrientationPortrait:
NSLog(@"UIInterfaceOrientationPortrait");
newOrientation = AVCaptureVideoOrientationPortrait;
break;
case UIInterfaceOrientationLandscapeLeft:
NSLog(@"UIInterfaceOrientationLandscapeRight");
newOrientation = AVCaptureVideoOrientationLandscapeLeft;
break;
case UIInterfaceOrientationLandscapeRight:
NSLog(@"UIInterfaceOrientationLandscapeLeft");
newOrientation = AVCaptureVideoOrientationLandscapeRight;
break;
default:
NSLog(@"default");
newOrientation = AVCaptureVideoOrientationPortrait;
break;
}
return newOrientation;
}
应用程序的这一部分正常工作(我在任何设备方向上都可以看到视频).但是当我尝试制作缩略图(或播放视频)时,我遇到了问题.
正如我在其他问题中所读到的,我为每首曲目做了以下事情:
AVAssetTrack* videoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
CGAffineTransform txf …