I am merging multiple videos and I want to detect which ones are in portrait mode and rotate them in landscape so that all movies are in landscape mode... I have done everything and works perfectly except the actual rotate, I guess it's something with the center of the rotation or a composed rotation.
AVMutableVideoCompositionLayerInstruction *videoTrackLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:compositionVideoTrack];
if([[AppDelegate sharedInstance] orientationForTrack:avAsset] == UIDeviceOrientationPortrait)
{
CGAffineTransform rotation = CGAffineTransformMakeRotation(M_PI/2);
//CGAffineTransform translateToCenter = CGAffineTransformMakeTranslation(640, 480);
//CGAffineTransform mixedTransform = CGAffineTransformConcat(rotation, translateToCenter);
[videoTrackLayerInstruction setTransform:rotation atTime:nextClipStartTime];
}
else if([[AppDelegate sharedInstance] orientationForTrack:avAsset] == UIDeviceOrientationPortraitUpsideDown)
{
CGAffineTransform rotation = CGAffineTransformMakeRotation(-M_PI/2);
[videoTrackLayerInstruction setTransform:rotation atTime:nextClipStartTime];
}
else if([[AppDelegate sharedInstance] orientationForTrack:avAsset] == UIDeviceOrientationLandscapeLeft)
{
CGAffineTransform rotation = CGAffineTransformMakeRotation(M_PI);
[videoTrackLayerInstruction setTransform:rotation atTime:nextClipStartTime];
}
else if([[AppDelegate sharedInstance] orientationForTrack:avAsset] == UIDeviceOrientationLandscapeRight)
{
[videoTrackLayerInstruction setTransform:CGAffineTransformIdentity atTime:nextClipStartTime];
}
How can I rotate them properly? I have tried multiple sources but nothing rotates them as they should. I am not interested in the 320 scale fit solution I want the video to keep as much resolution as possible before exporting using AVAssetExportSession.
A solution like this:
CGAffineTransform rotationTransform = CGAffineTransformMakeRotation(degreesToRadians(90.0));
CGAffineTransform rotateTranslate = CGAffineTransformTranslate(rotateTransform,320,0);
won't suit my needs as I have tried it. Do you have any ideas? Some help will be pretty much appreciated.
I have a subclass of a UIImageView containing some gesture recognisers that I'm using to apply transforms to itself. I'm having no issues with panning or scaling, but the rotated transform is causing problems when the device itself is rotated. Basically each time the device is rotated it will have the effect of scaling the image...
I guess it makes sense that the rotation of everything might cause problems with a rotated transform but does anyone know any ways around this kind of behaviour? Preferably something that can be implemented within the UIImageView subclass? I need other sibling views to autoresize so I can't disable "autoresize subviews" in the parent view.
Here's the code responsible for creating the rotated transform if it helps:
- (void)setUpRotation
{
UIRotationGestureRecognizer *newRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(handleRotationGesture)];
newRecognizer.delegate = self;
self.rotationRecognizer = newRecognizer;
[self addGestureRecognizer:self.rotationRecognizer];
[newRecognizer release];
self.userInteractionEnabled = YES;
}
- (void)handleRotationGesture
{
// Initial state
if(self.rotationRecognizer.state == UIGestureRecognizerStateEnded)
{
lastRotation = 0.0;
return;
}
CGFloat rotation = 0.0 - (lastRotation - self.rotationRecognizer.rotation);
CGAffineTransform currentTransform = self.transform;
self.transform = CGAffineTransformRotate(currentTransform,rotation);
lastRotation = self.rotationRecognizer.rotation;
}
This is on iOS 5.0 btw.
When I rotate my app the background image will not rotate and
I wish that my background image will rotate.
The content do changes the orientation but the background image stays and will not rotate.
Any ideas on a go around?
Thanks.
The idea is to apply a graphics "transform" to modify your image when the device is rotated. See this answer here... In your image controller, add the following code (where backgroundImage is a property containing your image.
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration {
if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
backgroundImage.transform = CGAffineTransformMakeRotation(M_PI / 2);
}
else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight){
backgroundImage.transform = CGAffineTransformMakeRotation(-M_PI / 2);
}
else {
backgroundImage.transform = CGAffineTransformMakeRotation(0.0);
}
}
I am trying to get the window coordinates of a table view using the following code:
[self.tableView.superview convertRect:self.tableView.frame toView:nil]
It reports the correct coordinates while in portrait mode, but when I rotate to landscape it no longer reports correct coordinates. First off, it flips the x, y coordinates and the width and height. That's not really the problem though. The real problem is that the coordinates are incorrect. In portrait the window coordinates for the table view's frame are {{0, 114}, {320, 322}}, while in landscape the window coordinates are {{32, 0}, {204, 480}}. Obviously the x-value here is incorrect, right? Shouldn't it be 84? I'm looking for a fix to this problem, and if anybody knows how to get the correct window coordinates of a view in landscape mode, I would greatly appreciate it if you would share that knowledge with me.
Here are some screenshots so you can see the view layout.
Portrait: http://i.stack.imgur.com/IaKJc.png
Landscape: http://i.stack.imgur.com/JHUV6.png
I've found what I believe to be the beginnings of the solution. It seems the coordinates you and I are seeing are being based on the bottom left or top right, depending on whether the orientation is UIInterfaceOrientationLandscapeRight or UIInterfaceOrientationLandscapeLeft.
I don't know why yet, but hopefully that helps. :)
[UPDATE]
So I guess the origin of the window is 0,0 in normal portrait mode, and rotates with the ipad/iphone.
So here's how I solved this.
First I grab my orientation, window bounds and the rect of my view within the window (with the wonky coordinates)
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
CGRect windowRect = appDelegate.window.bounds;
CGRect viewRectAbsolute = [self.guestEntryTableView convertRect:self.guestEntryTableView.bounds toView:nil];
Then if the orientation is landscape, I reverse the x and y coordinates and the width and height
if (UIInterfaceOrientationLandscapeLeft == orientation ||UIInterfaceOrientationLandscapeRight == orientation ) {
windowRect = XYWidthHeightRectSwap(windowRect);
viewRectAbsolute = XYWidthHeightRectSwap(viewRectAbsolute);
}
Then I call my function for fixing the origin to be based on the top left no matter the rotation of the ipad/iphone.
It fixes the origin depending on where 0,0 currently lives (depending on the orientation)
viewRectAbsolute = FixOriginRotation(viewRectAbsolute, orientation, windowRect.size.width, windowRect.size.height);
Here are the two functions I use
CGRect XYWidthHeightRectSwap(CGRect rect) {
CGRect newRect;
newRect.origin.x = rect.origin.y;
newRect.origin.y = rect.origin.x;
newRect.size.width = rect.size.height;
newRect.size.height = rect.size.width;
return newRect;
}
CGRect FixOriginRotation(CGRect rect, UIInterfaceOrientation orientation, int parentWidth, int parentHeight) {
CGRect newRect;
switch(orientation)
{
case UIInterfaceOrientationLandscapeLeft:
newRect = CGRectMake(parentWidth - (rect.size.width + rect.origin.x), rect.origin.y, rect.size.width, rect.size.height);
break;
case UIInterfaceOrientationLandscapeRight:
newRect = CGRectMake(rect.origin.x, parentHeight - (rect.size.height + rect.origin.y), rect.size.width, rect.size.height);
break;
case UIInterfaceOrientationPortrait:
newRect = rect;
break;
case UIInterfaceOrientationPortraitUpsideDown:
newRect = CGRectMake(parentWidth - (rect.size.width + rect.origin.x), parentHeight - (rect.size.height + rect.origin.y), rect.size.width, rect.size.height);
break;
}
return newRect;
}
This is a hack, but it works for me:
UIView *toView = [UIApplication sharedApplication].keyWindow.rootViewController.view;
[self.tableView convertRect:self.tableView.bounds toView:toView];
I am not sure this is the best solution. It may not work reliably if your root view controller doesn't support the same orientations as the current view controller.
You should be able to get the current table view coordinates from self.tableView.bounds
Your code should be:
[tableView convertRect:tableView.bounds toView:[UIApplication sharedApplication].keyWindow];
That will give you the view's rectangle in the window's coordinate system. Be sure to use "bounds" and not "frame". frame is the rectangle of the view in its parent view coordinate system already. "bounds" is the view rectangle in its own system. So the above code asks the table view to convert its own rectangle from its own system to the window's system. Your previous code was asking the table's parent view to convert the table's rectangle from the parent coordinate system to nothing.
Try bounds instead of frame
self.parentViewController.view.bounds
for it gives me adjusted coords according to the current orientation
My problem is that i have a MPMoviePlayerViewController embeded inside a modalviewcontroller that has the formsheet atribute and when the video goes to fullscreen using the pinch or the arrows the controls dont work.
I have figured out that they dont work because only touches inside the rectangle that makes the modalviewcontroller are registered. for example, double tapping to zoom inside the rectangle works while everywhere else it doesnt.
This is a problem since the movie controls can't be used due to this problem. Can anyone help?
Here is how I solved it. I changed the size of the modal view controller when the video was going into fullscreen.
-(void)movieDidEnterFullscreen:(NSNotification *)notification{
NSLog(#"did enter");
self.navigationController.view.superview.frame = CGRectMake(0, 0, 1500,1500);
self.navigationController.view.superview.center = self.view.center;
[mpviewController moviePlayer].controlStyle = MPMovieControlStyleDefault;
}
-(void)movieDidExitFullscreen:(NSNotification *)notification{
NSLog(#"did exit");
UIDevice *device = [UIDevice currentDevice];
[device beginGeneratingDeviceOrientationNotifications];
if (([device orientation] == UIDeviceOrientationLandscapeLeft) || ([device orientation] == UIDeviceOrientationLandscapeRight)){
self.navigationController.view.superview.frame = CGRectMake(0, 0, 620,540);
self.navigationController.view.superview.center = CGPointMake(384, 512);
}
else {
self.navigationController.view.superview.frame = CGRectMake(0, 0, 540,620);
self.navigationController.view.superview.center = CGPointMake(384, 512);
}
[mpviewController moviePlayer].controlStyle = MPMovieControlStyleEmbedded;
}