[iPhoneSDKDeveloper]

its hard to add on the extra bits of code you guys tell me. can one of you, who has successfully completed the plcameracontroller, send a download link with the xcode file so i can recieve it on a file sharing website. its really hard to code the camera controller.

[natios]

Thanks for your time rilocr.
You've helped me a lot.

[basm]

Originally Posted by rilocr

Hi troffmo5

Yes, _createPreviewImage is a screen capture, so if you have a navigation bar or a tool bar, they will appear on the image, I have tried also with _createPreviewIOSurface and it is the same, it's a screen capture.

Also, both functions return, what it seems, a preprocessed image/buffer, so the size is way too big than the size of the raw data buffer...

But, yes I think that's a solution, but at least, for my app, I really need the raw data :-(

Thanks

Hi there,

has anyone ever figured out a way to access the camera directly or find a workaround?
It is really annoying that you get a screen-capture when calling _createPreviewImage !! Whenever you overlay the cameras UIView with controls or opengl the image returned from _createPreviewImage is useless!

I tried to do a screen capture and only capture the camera UIView, but i can't use the cams UIView with:

UIGraphicsBeginImageContext(cam.bounds.size);
	[cam.layer renderInContext:UIGraphicsGetCurrentContext()];
	UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();

because it's not a full UIView and i don't know how to extend it to be able to use it with the screen capture mechanism.

Did any of you figure out how to get the cameras raw data or does anyone know how to extend the camdelegate to be able to take screenshots?

Greets
bas

[max.reif]

Hi,
i have an iphone 3g and want to make a video camera.
I can see the preview and i can get every 1/15 sec an UIImage ([cameraController _createPreviewImage]).
Now i want to save them because if they are stored in an array the iphone's memory is in less than 5 sec full.

Thans in advance
Max

Sorry, my English is so bad;
I'm german and 14 years old.

[rilocr]

Hi,

You can use ffmpeg, just google it. That would be an external library for your app, but I think there are other solutions.

Regards

[OniDaito]

I seem to be hitting this wall as well. trying to do AR apps using screengrabs is obviously impossible. I can see that the _camera variable was removed in FW3 which is proving to be a stumbling block. Has anybody managed to find the secret to grabbing the raw data yet and installing the needed callbacks?

Actually, I've noticed that Cycorder still works fine with my iPhone with FW3. I take it then, that Cycorder uses a different method than the one we are talking about here? If so, does anyone know the method used there? Personally, I don't care how it's done, so long as I can get to play with some AR.

[rilocr]

I read in another forum the Cycorder does access the camera directly and also it uses the hardware MPEG encoder provided by the Infineon PMB8876 S-GOLD 2 chip onboard, but it seems Saurik doesn't want to share his secret, obviously...

[OniDaito]

Yeah, he aint talkin' about that sort of thing. I suspect it's some evil, low-level c hacking with the Jailbreak stuff. It's certainly an option I'm considering anyway. Theres probably a /dev style device he's playing with. Regardless I'd like to use the non-jailbreak method but the removal of _camera is proving annoying. Damn you Apple!

[kraft2000]

Hey,

I'm using the same kind of code you used (with a _createPreviewIOSurface inside a timer), and I just found a way to superpose drawings without affecting the Preview image.

You just have to add a UIWindow, with a transparent view, and draw inside that view :

	cameraController = [(id)objc_getClass("PLCameraController") performSelector:@selector(sharedInstance)];
	[cameraController retain];
	[cameraController setDelegate:self];
	[cameraController setFocusDisabled:NO];
	[cameraController setDontShowFocus:YES];
	[cameraController setCameraMode:1];
	
	previewView = [self.cameraController performSelector:@selector(previewView)];
	[previewView retain];
	previewView.center = CGPointMake(previewView.center.x, previewView.center.y + 43);
	[self.view addSubview:previewView];
	
	myImageView = [[MyImageView alloc] initWithFrame:previewView.frame];
	myImageView.center = CGPointMake(myImageView.center.x, myImageView.center.y + 20);
	myImageView.backgroundColor = [UIColor clearColor];

	myWindow = [[UIWindow alloc] init];
	[myWindow addSubview:myImageView];

	[myWindows makeKeyAndVisible];

with MyImageView a UIView class in which I derived the drawRect method, and with a call to [faceImageView setNeedsDisplay] inside the timer method.

It's still not the best method ever to grab the camera buffer, but at least I can start displaying things without affecting my algorithm.

[OniDaito]

Have I understood you rightly? Does this method allow you to sample the CameraView without sampling the stuff you draw over the top?

[kraft2000]

yep, just an a new UIwindow and draw stuff you want inside it.

[OniDaito]

Cant remember if I ever got the PLCameraController to work. I presume this is using iPhone SDK/OS 2?

Originally Posted by displaced

Ok - I think it've got it:

Basically, I'm bypassing the header file entirely – instead instantiating the camera controller using objc_getClass.

My init code is thus:

self.cameraController = [(id)objc_getClass("PLCameraController") performSelector:@selector(sharedInstance)];
		[cameraController setDelegate:self];
		[cameraController setFocusDisabled:NO];
		[cameraController setCaptureAtFullResolution:YES];
		[cameraController setDontShowFocus:YES];
		
		UIView *previewView = [cameraController performSelector:@selector(previewView)];
		[containerView addSubview:previewView];
		[cameraController performSelector:@selector(startPreview)];
		sleep(2);

I tried this but my self.cameraController is always null. I suspect there is something I'm missing; a framework maybe?

Sorry guys, just figured it out. PhotoLibrary framework for OS 3.1.2 fixes this to a degree.... I end up with a black screen with the classic white bar at the bottom. Argh!