// |
// MyRecorderController.m |
// MyRecorder |
/* |
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*/ |
#import "MyRecorderController.h" |
@implementation MyRecorderController |
- (void)awakeFromNib |
{ |
// Create the capture session |
mCaptureSession = [[QTCaptureSession alloc] init]; |
// Connect inputs and outputs to the session |
BOOL success = NO; |
NSError *error; |
// Find a video device |
QTCaptureDevice *videoDevice = [QTCaptureDevice defaultInputDeviceWithMediaType:QTMediaTypeVideo]; |
success = [videoDevice open:&error]; |
// If a video input device can't be found or opened, try to find and open a muxed input device |
if (!success) { |
videoDevice = [QTCaptureDevice defaultInputDeviceWithMediaType:QTMediaTypeMuxed]; |
success = [videoDevice open:&error]; |
} |
if (!success) { |
videoDevice = nil; |
// Handle error |
} |
if (videoDevice) { |
//Add the video device to the session as a device input |
mCaptureVideoDeviceInput = [[QTCaptureDeviceInput alloc] initWithDevice:videoDevice]; |
success = [mCaptureSession addInput:mCaptureVideoDeviceInput error:&error]; |
if (!success) { |
// Handle error |
} |
// If the video device doesn't also supply audio, add an audio device input to the session |
if (![videoDevice hasMediaType:QTMediaTypeSound] && ![videoDevice hasMediaType:QTMediaTypeMuxed]) { |
QTCaptureDevice *audioDevice = [QTCaptureDevice defaultInputDeviceWithMediaType:QTMediaTypeSound]; |
success = [audioDevice open:&error]; |
if (!success) { |
audioDevice = nil; |
// Handle error |
} |
if (audioDevice) { |
mCaptureAudioDeviceInput = [[QTCaptureDeviceInput alloc] initWithDevice:audioDevice]; |
success = [mCaptureSession addInput:mCaptureAudioDeviceInput error:&error]; |
if (!success) { |
// Handle error |
} |
} |
} |
// Create the movie file output and add it to the session |
mCaptureMovieFileOutput = [[QTCaptureMovieFileOutput alloc] init]; |
success = [mCaptureSession addOutput:mCaptureMovieFileOutput error:&error]; |
if (!success) { |
// Handle error |
} |
[mCaptureMovieFileOutput setDelegate:self]; |
// Set the compression for the audio/video that is recorded to the hard disk. |
NSEnumerator *connectionEnumerator = [[mCaptureMovieFileOutput connections] objectEnumerator]; |
QTCaptureConnection *connection; |
// iterate over each output connection for the capture session and specify the desired compression |
while ((connection = [connectionEnumerator nextObject])) { |
NSString *mediaType = [connection mediaType]; |
QTCompressionOptions *compressionOptions = nil; |
// specify the video compression options |
// (note: a list of other valid compression types can be found in the QTCompressionOptions.h interface file) |
if ([mediaType isEqualToString:QTMediaTypeVideo]) { |
// use H.264 |
compressionOptions = [QTCompressionOptions compressionOptionsWithIdentifier:@"QTCompressionOptions240SizeH264Video"]; |
// specify the audio compression options |
} else if ([mediaType isEqualToString:QTMediaTypeSound]) { |
// use AAC Audio |
compressionOptions = [QTCompressionOptions compressionOptionsWithIdentifier:@"QTCompressionOptionsHighQualityAACAudio"]; |
} |
// set the compression options for the movie file output |
[mCaptureMovieFileOutput setCompressionOptions:compressionOptions forConnection:connection]; |
} |
// Associate the capture view in the UI with the session |
[mCaptureView setCaptureSession:mCaptureSession]; |
[mCaptureSession startRunning]; |
} |
} |
// Handle window closing notifications for your device input |
- (void)windowWillClose:(NSNotification *)notification |
{ |
[mCaptureSession stopRunning]; |
if ([[mCaptureVideoDeviceInput device] isOpen]) |
[[mCaptureVideoDeviceInput device] close]; |
if ([[mCaptureAudioDeviceInput device] isOpen]) |
[[mCaptureAudioDeviceInput device] close]; |
} |
// Handle deallocation of memory for your capture objects |
- (void)dealloc |
{ |
[mCaptureSession release]; |
[mCaptureVideoDeviceInput release]; |
[mCaptureAudioDeviceInput release]; |
[mCaptureMovieFileOutput release]; |
[super dealloc]; |
} |
#pragma mark- |
// Add these start and stop recording actions, and specify the output destination for your recorded media. The output is a QuickTime movie. |
- (IBAction)startRecording:(id)sender |
{ |
[mCaptureMovieFileOutput recordToOutputFileURL:[NSURL fileURLWithPath:@"/Users/Shared/My Recorded Movie.mov"]]; |
} |
- (IBAction)stopRecording:(id)sender |
{ |
[mCaptureMovieFileOutput recordToOutputFileURL:nil]; |
} |
// Do something with your QuickTime movie at the path you've specified at /Users/Shared/My Recorded Movie.mov" |
- (void)captureOutput:(QTCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL forConnections:(NSArray *)connections dueToError:(NSError *)error |
{ |
[[NSWorkspace sharedWorkspace] openURL:outputFileURL]; |
} |
@end |
Last updated: 2008-01-29