is there any way to check video camera capability available on iPhone?
Most of the camera related availability support is exposed through the UIImagePickerController. A bit tricker thing is detection of Video Camera. You can detect the presence of a video camera in a iOS device using the following method.
- (BOOL) isVideoCameraAvailable
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
NSArray *sourceTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];
[picker release];
if (![sourceTypes containsObject:(NSString *)kUTTypeMovie ]){
return NO;
}
return YES;
}
Found this code (based on UIDevice) which helped me with this issue:
https://github.com/MugunthKumar/DeviceHelper
Related
Hey I was wondering how I can access the front facing camera. Maybe there's some guide for it?
But I don't want all buttons etc. I just want to access the from facing camera, I don't ant the button to take a photo or anything like that.
You can access the front facing camera like:
picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
Check out the UIImagePickerController Class Reference
Just set the cameraDevice property of UIImagePickerController to UIImagePickerControllerCameraDeviceFront. But you should check if the device is available.
You should initiate an AVCaptureSession and specify which AVCaptureDevice to use ( AVCaptureDevicePositionFront in your case).
Start looking for the AVCaptureSession documentation and you should have a better understanding of what to do.
Well, what "Khushbu Shah" said is right. however actually the isCameraDeviceAvailable is available only ios 4 and above. Just to ensure that you opened the front camera only if it is there, the right code block to be used is as follows.
UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
ipc.delegate = self;
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
if([UIImagePickerController respondsToSelector:#selector(isCameraDeviceAvailable:)])
{ //check if iphone 4 and above
if([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront])
{
ipc.cameraDevice=UIImagePickerControllerCameraDeviceFront;
}
}
}
[ipc release];
First thing you need to do is to detect if your device has got front-facing camera. For that you need to iterate through the video devices.
Try this method of UIImagePickerController:
+ (BOOL)isCameraDeviceAvailable:(UIImagePickerControllerCameraDevice)cameraDevice
This is a class method and UIImagePickerControllerCameraDevice can take two values:
- UIImagePickerControllerCameraDeviceRear
- UIImagePickerControllerCameraDeviceFront
Example code:
if( [UIImagePickerController isCameraDeviceAvailable: UIImagePickerControllerCameraDeviceFront]){
// do something
}
Can I programmatically turn on the camera flash on a new iPhone 4 device, before taking a picture with -takePicture?
I'm developing a photo taking app for iOS 4 and want to power on the flash light before the user takes a picture, so they can see the effect of the flash in advance.
The problem seems to be that for the flash light to stay on, you'll need to set the torchMode on and this is only possible in 'video mode' (UIImagePickerControllerCameraCaptureModeVideo), while you can only ask the UIImagePickerController to takePicture when it is on 'photo mode' (UIImagePickerControllerCameraCaptureModePhoto).
So, the following works, but only shows the flash light when taking a picture:
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.showsCameraControls = NO;
picker.navigationBarHidden = YES;
picker.toolbarHidden = YES;
picker.mediaTypes = [NSArray arrayWithObjects:#"public.image", nil];
picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
[self presentModalViewController:picker animated:YES];
And this also works (shows the torch the whole time), but then I cannot take a picture.
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.showsCameraControls = NO;
picker.navigationBarHidden = YES;
picker.toolbarHidden = YES;
picker.mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeMovie, nil];
picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
[self presentModalViewController:picker animated:YES];
When I try the toggleTorch code found here: Turn on torch/flash on iPhone there seems to not be any live video feed in the UIImagePickerController.
Are these UIImagePickerController and AVCaptureSession compatible with each other? or are you supposed to choose for either one or the other?
And does anybody know a workaround to get both the flash mode on (or torchMode) and to be able to takePicture?
Have a look at the WWDC 2010 sessions (specifically 409) where they go into functionality like the one you're looking for.
Essentially you need to move away from UIImagePickerController if you're looking to perform these custom camera functions and move towards AVFoundation classes.
Hey guys i was curious if anybody could give me a very brief description of how to make an app record video in iOs 4. I know how to do all the media and whatnot using the os 3 method of using the UIImagePickerController but I do not know if that is still available in iOs4 and if not, could someone please give me a very brief description on how to do it using the new method? (No code required, but is more than welcome.)
-Thank you!
It's pretty straightforward.
I just made a view-based app with a single button on the interface to test this. The button's action is - (IBAction)shootButtonPressed;
You have to check if the device supports video recording and then configure the image picker controller to only shoot video. This code will only work on an actual device.
In the main view controller header, I made it conform to two protocols: UIImagePickerControllerDelegate and UINavigationControllerDelegate
Then I implemented the button press method like this;
- (IBAction)shootButtonPressed;
{
BOOL canShootVideo = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];
if (canShootVideo) {
UIImagePickerController *videoRecorder = [[UIImagePickerController alloc] init];
videoRecorder.sourceType = UIImagePickerControllerSourceTypeCamera;
videoRecorder.delegate = self;
NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
NSArray *videoMediaTypesOnly = [mediaTypes filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"(SELF contains %#)", #"movie"]];
BOOL movieOutputPossible = (videoMediaTypesOnly != nil);
if (movieOutputPossible) {
videoRecorder.mediaTypes = videoMediaTypesOnly;
[self presentModalViewController:videoRecorder animated:YES];
}
[videoRecorder release];
}
}
You also have to implement two more methods to handle when a movie's shot & chosen and when the user cancels the video camera picker.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self dismissModalViewControllerAnimated:YES];
// save the movie or something here, pretty much the same as doing a photo
NSLog(#"movie captured %#", info);
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
// process the cancellation of movie picker here
NSLog(#"Capture cancelled");
}
Super easy.
For more details, see the Multimedia Programming Guide --> About Audio and Video --> Using Video --> Recording and Editing Video. It's in the Apple Docs, although a little scattered for my taste.
HI,
I need to record video using iPhone. To do that i used UIImagePickerController. I have an iPhone 3G, with me. when i run my code to check if source type available it says device not supported. My OS is 3.2.1, where i am wrong, can some one tell me what i need to change.
Also is there some other way to record video. What i need to do is to get the video stream as it is recorded.
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
NSArray *sourceTypes =
[UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];
if (![sourceTypes containsObject:(NSString *)kUTTypeVideo ]){
NSLog(#"device not supported");
return;
}
//picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeVideo];
picker.videoQuality = UIImagePickerControllerQualityTypeHigh;
[self presentModalViewController:picker animated:YES];
Thanks,
That is because the 3G isn't supported for video recording.
Lance is correct. The native UIImagePickerController does not work on iPhone 3G. If an app does do video recording on a 3G they are doing a hack like taking multiple photos in succession and manually encoding a video file using the individual images.
I am using UIImagePickerController to record a video with the sourceType set to UIImagePickerControllerSourceTypeCamera.
I have set allowsEditing to true so that the video can be edited before the picker returns. But after I edit the video using the trimming interface and press "Pick", I only get back the original recording in the delegate, not the trimmed version. What am I doing wrong? I am using iPhone OS 3.1.3. I remember this used to work in an earlier version but it seems to be failing in the latest OS. Any help is appreciated?
By the way i confirmed that if the source of the video is UIImagePickerControllerSourceTypeSavedPhotosAlbum, the trimming works in version 3.1.3. So trimming with source as the camera is failing. Interestingly with the camera-roll/photos-album as the source, a "Choose" button appears and soon after clicking it, the controller displays a message saying the "Video is being trimmed ... ". I don't get this message when using the camera source.
Here is a snippet of the code I am using to record a video using the camera source.
- (void) recordVideo {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeMovie];
picker.videoQuality = UIImagePickerControllerQualityTypeHigh;
[self presentModalViewController:picker animated:YES];
[picker release];
}
My delegate implementation is as follows:
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo: (NSDictionary *)info {
[picker dismissModalViewControllerAnimated:YES];
self.videoPath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
...
}
Thanks a lot,
kris.
Just ran into this myself ... and found this post when looking for a solution.
looks like the only way around this is to copy the file to your app's directory, then open the UIVideoEditorController ...
Anyone know if this UIImagePickerController newly-captured video not being trimmed issue is a bug in the SDK, or are we doing something wrong?