Front Camera Video Recording iPhone 4? - iphone

Question

i am trying to record a video from front camera of iPhone 4 using AVFoundation Framework with the help of WWDC samples i got from iPhone developer program. But i still cant get it to work..the video does not get recorded or mayb saved in my iPhone library...here's the code i am trying to use...it would b really helpful if someone culd help me with the problem i am having??
-(void)recordVideo
{
AVCaptureDeviceInput *videoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backFacingCamera] error:nil];
AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
AVCaptureSession *session = [[AVCaptureSession alloc] init];
[session addInput:videoInput];
[session addOutput:movieFileOutput];
[movieFileOutput release];
if (![session isRunning])
{
[self performSelector:#selector(startRecording) withObject:nil afterDelay:1.0];
[session startRunning];
}
}
- (void) startRecording
{
NSLog(#"start recording");
AVCaptureConnection *videoConnection = [playVideo connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self movieFileOutput] connections]];
if ([videoConnection isVideoOrientationSupported]) {
[videoConnection setVideoOrientation:[self orientation]];
}
[[self movieFileOutput] startRecordingToOutputFileURL:[self tempFileURL]
recordingDelegate:self];
}
- (void) stopRecording
{
NSLog(#"stop recording");
[[self movieFileOutput] stopRecording];
}
- (NSURL *) tempFileURL
{
NSLog(#"temp file url");
NSString *outputPath = [[NSString alloc] initWithFormat:#"%#%#", NSTemporaryDirectory(), #"output.mov"];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:outputPath]) {
NSLog(#"exists");
}
[outputPath release];
return [outputURL autorelease];
}
- (void) setConnectionWithMediaType:(NSString *)mediaType enabled:(BOOL)enabled;
{
[[playVideo connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self movieFileOutput] connections]] setEnabled:enabled];
}
+ (AVCaptureConnection *)connectionWithMediaType:(NSString *)mediaType fromConnections:(NSArray *)connections;
{
NSLog(#"connection with media type");
for ( AVCaptureConnection *connection in connections ) {
for ( AVCaptureInputPort *port in [connection inputPorts] ) {
if ( [[port mediaType] isEqual:mediaType] ) {
return [[connection retain] autorelease];
}
}
}
return nil;
}
#implementation recordVideo (Internal)
- (AVCaptureDevice *) cameraWithPosition:(AVCaptureDevicePosition) position
{
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices) {
if ([device position] == position) {
return device;
}
}
return nil;
}
- (AVCaptureDevice *) backFacingCamera
{
NSLog(#"back");
return [self cameraWithPosition:AVCaptureDevicePositionBack];
}
- (AVCaptureDevice *) frontFacingCamera
{
NSLog(#"front ");
return [self cameraWithPosition:AVCaptureDevicePositionFront];
}
#end
#implementation recordVideo (AVCaptureFileOutputRecordingDelegate)
- (void) captureOutput:(AVCaptureFileOutput *)captureOutput
didStartRecordingToOutputFileAtURL:(NSURL *)fileURL
fromConnections:(NSArray *)connections
{
NSLog(#"did start recording");
}
- (void) captureOutput:(AVCaptureFileOutput *)captureOutput
didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
fromConnections:(NSArray *)connections
error:(NSError *)error
{
NSLog(#"did finish recording output file");
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:outputFileURL])
{
[library writeVideoAtPathToSavedPhotosAlbum:outputFileURL
completionBlock:^(NSURL *assetURL, NSError *error){
if (error && [delegate respondsToSelector:#selector(assetLibraryError:forURL:)]) {
[delegate assetLibraryError:error forURL:assetURL];
}
}];
}
else {
}
[library release];
}
#end

Answer 1

You are throwing away the errors - how can you debug if you do that?
You need to be more specific in what is / is not happening. Which methods are called? What errors are reported by the SDK (if any)? etc...

Answer 2

you have released reference to movieFileOutput in -(void)recordVideo;
and you are still using released movieFileOutput in - (void) startRecording as well as
other functions.You better not release object that you are using.