SCAudioVideoRecorder

A Vine like audio/video recorder in Objective-C.

These classes allow the recording of a video with pause/resume function. Although the project was initially made for the sake of taking videos only, you can now take pictures as well with some very useful utility functions that make the project totally suitable for a standalone camera engine. They are straightforward to use, only a few lines of code is needed to start recording.

They are compatible both for OS X and iOS. Examples for both OS X and IOS are provided.

Framework needed:

• AssetsLibrary

Straightforward recording using SCCamera

Initialising the camera:

// Create the camera
SCCamera * camera = [SCCamera camera];

// Set the target UIView (or NSView for OS X) which will receive the video preview
camera.previewView = self.cameraView;

// Start the session and the flow of inputs
[camera initialize:^(NSError *audioError, NSError *videoError) {

}];

Interacting with the camera:

// Prepare the camera to record on the camera roll
NSError * error;
[camera prepareRecordingAtCameraRoll:&error];

// Prepare the camera to record on a temp file
// The returned url is the generated temp file
NSURL * outputUrl = [camera prepareRecordingOnTempDir:&error];

// Prepare the camera to record on the specified url
[camera prepareRecordingAtUrl:[NSURL URLWithString:@"file://output.mp4"] error:&error];

// Ask the camera to record (the camera must be prepared before)
[camera record];

// Ask the camera to pause
[camera pause];

// Ask the camera to finish the recording. After calling this,
// the camera wont be able to record on the file again and it will
// loose its "prepared" state. Therefore "prepareRecording" must be called
// before trying to record again.
[camera stop];

// Handle the recorded file
camera.delegate = self;
- (void) audioVideoRecorder:(SCAudioVideoRecorder *)audioVideoRecorder didFinishRecordingAtUrl:(NSURL *)recordedFile error:(NSError *)error {
	if (error == nil) {
		NSLog(@"Succesfully recorded file at %@", recordedFile);
	} else {
		NSLog(@"Failed to record file: %@", error);
	}
}

Taking pictures with the SCCamera

Not only the SCCamera can take videos, but it can be used for taking pictures as well.

// Taking a picture
[camera capturePhoto];

// Handle the captured photo
// The photoDict contains the multiple attributes of the captured photo as seen below
- (void)audioVideoRecorder:(SCAudioVideoRecorder *)audioVideoRecorder capturedPhoto:(NSDictionary *)photoDict error:(NSError *)error {
	NSDictionary * metadata = [photoDict objectForKey:SCAudioVideoRecorderPhotoMetadataKey];
	NSData * jpegData = [photoDict objectForKey:SCAudioVideoRecorderPhotoJPEGKey];
	UIImage * image = [photoDict objectForKey:SCAudioVideoRecorderPhotoImageKey];
	UIImage * thumbnail = [photoDict objectForKey:SCAudioVideoRecorderPhotoThumbnailKey];
)

// Focus
[camera autoFocusAtPoint:CGPointMake(40, 40)];
[camera continuousFocusAtPoint:CGPointMake(40, 40)];

// Handling focus change (useful for showing an animation for instance)
- (void)cameraWillStartFocus:(SCCamera *)camera {
	
}

- (void)cameraDidStopFocus:(SCCamera *)camera {

}

Configuring SCCamera

// Changing from back to front camera
camera.cameraDevice = SCCameraDeviceBack;
camera.cameraDevice = SCCameraDeviceFront;

// Just switch between front and back device
[camera switchCamera];

// Setting the flash mode
camera.flashMode = SCFlashModeOff; // Totally disable the flash
camera.flashMode = SCFlashModeOn; // Will flash when taking a picture
camera.flashMode = SCFlashModeAuto; // The device will figure out if the flash is needed or not when taking a picture
camera.flashMode = SCFlashModeLight; // The flash will be always on

Manually handling AVCaptureSession with SCAudioVideoRecorder

The SCCamera seen just before inherits from SCAudioVideoRecorder. The whole "interacting with the camera" part is thus valable for the SCAudioVideoRecorder as well. The SCCamera just adds an automatic handling of the AVCaptureSession. If you want to manually handle the CaptureSession yourself, here is how you can do:

AVCaptureSession * session = [[AVCaptureSession alloc] init];
SCAudioVideoRecorder * avr = [[SCAudioVideoRecorder alloc] init];

// Adding the support for the audio
[session addOutput:avr.audioOutput];

// Adding the support for the video
[session addOutput:avr.videoOutput];