Is there a framework in iOS that provides the function of recording video with zoom in / out I tried to use AVFoundation, but did not get any success. I use the following code to record video
- (void) startCamera NSLog(@"Setting up capture session"); CaptureSession = [[AVCaptureSession alloc] init]; //----- ADD INPUTS ----- NSLog(@"Adding video input"); //ADD VIDEO INPUT AVCaptureDevice *VideoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if (VideoDevice) { NSError *error; VideoInputDevice = [AVCaptureDeviceInput deviceInputWithDevice:VideoDevice error:&error]; if (!error) { if ([CaptureSession canAddInput:VideoInputDevice]) [CaptureSession addInput:VideoInputDevice]; else NSLog(@"Couldn't add video input"); } else { NSLog(@"Couldn't create video input"); } } else { NSLog(@"Couldn't create video capture device"); } //ADD AUDIO INPUT NSLog(@"Adding audio input"); AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio]; NSError *error = nil; AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error]; if (audioInput) { [CaptureSession addInput:audioInput]; } //----- ADD OUTPUTS ----- //ADD VIDEO PREVIEW LAYER NSLog(@"Adding video preview layer"); [self setPreviewLayer:[[AVCaptureVideoPreviewLayer alloc] initWithSession:CaptureSession]]; PreviewLayer.orientation = AVCaptureVideoOrientationPortrait; //<<SET ORIENTATION. You can deliberatly set this wrong to flip the image and may actually need to set it wrong to get the right image [[self PreviewLayer] setVideoGravity:AVLayerVideoGravityResizeAspectFill]; //ADD MOVIE FILE OUTPUT NSLog(@"Adding movie file output"); MovieFileOutput = [[AVCaptureMovieFileOutput alloc] init]; Float64 TotalSeconds = 60; //Total seconds int32_t preferredTimeScale = 30; //Frames per second CMTime maxDuration = CMTimeMakeWithSeconds(TotalSeconds, preferredTimeScale); //<<SET MAX DURATION MovieFileOutput.maxRecordedDuration = maxDuration; MovieFileOutput.minFreeDiskSpaceLimit = 1024 * 1024; //<<SET MIN FREE SPACE IN BYTES FOR RECORDING TO CONTINUE ON A VOLUME if ([CaptureSession canAddOutput:MovieFileOutput]) [CaptureSession addOutput:MovieFileOutput]; //SET THE CONNECTION PROPERTIES (output properties) [self CameraSetOutputProperties]; //(We call a method as it also has to be done after changing camera) //----- SET THE IMAGE QUALITY / RESOLUTION ----- //Options: // AVCaptureSessionPresetHigh - Highest recording quality (varies per device) // AVCaptureSessionPresetMedium - Suitable for WiFi sharing (actual values may change) // AVCaptureSessionPresetLow - Suitable for 3G sharing (actual values may change) // AVCaptureSessionPreset640x480 - 640x480 VGA (check its supported before setting it) // AVCaptureSessionPreset1280x720 - 1280x720 720p HD (check its supported before setting it) // AVCaptureSessionPresetPhoto - Full photo resolution (not supported for video output) NSLog(@"Setting image quality"); [CaptureSession setSessionPreset:AVCaptureSessionPresetMedium]; if ([CaptureSession canSetSessionPreset:AVCaptureSessionPreset640x480]) //Check size based configs are supported before setting them [CaptureSession setSessionPreset:AVCaptureSessionPreset640x480]; //----- DISPLAY THE PREVIEW LAYER ----- //Display it full screen under out view controller existing controls NSLog(@"Display the preview layer"); CGRect layerRect; layerRect = CGRectMake(284, 0, 200, 200); [PreviewLayer setBounds:layerRect]; [PreviewLayer setPosition:CGPointMake(CGRectGetMidX(layerRect), CGRectGetMidY(layerRect))]; //[[[self view] layer] addSublayer:[[self CaptureManager] previewLayer]]; //We use this instead so it goes on a layer behind our UI controls (avoids us having to manually bring each control to the front): UIView *CameraView = [[UIView alloc] init]; [[self view] addSubview:CameraView]; [self.view sendSubviewToBack:CameraView]; [[CameraView layer] addSublayer:PreviewLayer]; //----- START THE CAPTURE SESSION RUNNING ----- [CaptureSession startRunning]; } //********** CAMERA SET OUTPUT PROPERTIES ********** - (void) CameraSetOutputProperties { //SET THE CONNECTION PROPERTIES (output properties) AVCaptureConnection *CaptureConnection = [MovieFileOutput connectionWithMediaType:AVMediaTypeVideo]; //Set landscape (if required) if ([CaptureConnection isVideoOrientationSupported]) { AVCaptureVideoOrientation orientation = AVCaptureVideoOrientationPortrait; //<<<<<SET VIDEO ORIENTATION IF LANDSCAPE [CaptureConnection setVideoOrientation:orientation]; } //Set frame rate (if requried) CMTimeShow(CaptureConnection.videoMinFrameDuration); CMTimeShow(CaptureConnection.videoMaxFrameDuration); if (CaptureConnection.supportsVideoMinFrameDuration) CaptureConnection.videoMinFrameDuration = CMTimeMake(1, CAPTURE_FRAMES_PER_SECOND); if (CaptureConnection.supportsVideoMaxFrameDuration) CaptureConnection.videoMaxFrameDuration = CMTimeMake(1, CAPTURE_FRAMES_PER_SECOND); CMTimeShow(CaptureConnection.videoMinFrameDuration); CMTimeShow(CaptureConnection.videoMaxFrameDuration); } //********** DID FINISH RECORDING TO OUTPUT FILE AT URL ********** - (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error { NSLog(@"didFinishRecordingToOutputFileAtURL - enter"); BOOL RecordedSuccessfully = YES; if ([error code] != noErr) { // A problem occurred: Find out if the recording was successful. id value = [[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey]; if (value) { RecordedSuccessfully = [value boolValue]; } } if (RecordedSuccessfully) { //----- RECORDED SUCESSFULLY ----- NSLog(@"didFinishRecordingToOutputFileAtURL - success"); ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:outputFileURL]) { [library writeVideoAtPathToSavedPhotosAlbum:outputFileURL completionBlock:^(NSURL *assetURL, NSError *error) { if (error) { } }]; } } }
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