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POadd wobble icon to a video
 

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    <p>Could someone help me to merge an icon to a video which should wobble as the video play. I have added the animation to wobble icon but only a static icon gets merge to the video . I will really appreciate if someone could help me.</p> <p>I am giving you the code which I an using</p> <pre><code>//- (void)exportDidFinish:(AVAssetExportSession*)session{ NSLog(@"baseView subviews : %@", [baseView subviews]); UIGraphicsBeginImageContext(baseView.bounds.size); [baseView.layer renderInContext:UIGraphicsGetCurrentContext()]; //[self wobbleVideo:baseView]; UIImage *resultImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); aLayer = [CALayer layer]; aLayer.frame = CGRectMake(0, 0, 320, 380); aLayer.bounds = CGRectMake(0, 0, 320, 380); aLayer.contents = (id) resultImage.CGImage; aLayer.opacity = 1; aLayer.backgroundColor = [UIColor clearColor].CGColor; aLayer.geometryFlipped = YES; [aLayer addAnimation:[self getShakeAnimation] forKey:@"transform"]; AVURLAsset *asset = [AVURLAsset URLAssetWithURL:rotatedVideoUrl options:nil]; cmp = [AVMutableComposition composition]; AVMutableCompositionTrack *videoComposition = [cmp addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; AVMutableCompositionTrack *audioComposition = [cmp addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; AVAssetTrack *sourceVideoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]; AVAssetTrack *sourceAudioTrack = [[asset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]; [videoComposition insertTimeRange:CMTimeRangeMake(kCMTimeZero, [asset duration]) ofTrack:sourceVideoTrack atTime:kCMTimeZero error:nil] ; [audioComposition insertTimeRange:CMTimeRangeMake(kCMTimeZero, [asset duration]) ofTrack:sourceAudioTrack atTime:kCMTimeZero error:nil] ; animComp = [AVMutableVideoComposition videoComposition]; animComp.renderSize = CGSizeMake(320, 360); animComp.frameDuration = CMTimeMake(1,30); CALayer *parentLayer = [CALayer layer]; CALayer *videoLayer = [CALayer layer]; parentLayer.frame = CGRectMake(0, 0, 320, 360); videoLayer.frame = CGRectMake(0, 0, 320, 360); [parentLayer addSublayer:videoLayer]; [parentLayer addSublayer:aLayer]; animComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer]; // to gather the audio part of the video NSArray *tracksToDuck = [cmp tracksWithMediaType:AVMediaTypeAudio]; NSMutableArray *trackMixArray = [NSMutableArray array]; for (NSInteger i = 0; i &lt; [tracksToDuck count]; i++) { AVMutableAudioMixInputParameters *trackMix = [AVMutableAudioMixInputParameters audioMixInputParametersWithTrack:[tracksToDuck objectAtIndex:i]]; [trackMix setVolume:10 atTime:kCMTimeZero]; [trackMixArray addObject:trackMix]; } audioMix = [AVMutableAudioMix audioMix]; audioMix.inputParameters = trackMixArray; AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction]; instruction.timeRange = CMTimeRangeMake(kCMTimeZero, [asset duration]); AVMutableVideoCompositionLayerInstruction *layerVideoInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:videoComposition]; [layerVideoInstruction setOpacity:1.0 atTime:kCMTimeZero]; instruction.layerInstructions = [NSArray arrayWithObject:layerVideoInstruction] ; animComp.instructions = [NSArray arrayWithObject:instruction]; [self exportMovie:self]; } //WOBBLE ANIMATION------------------------------------- - (CAKeyframeAnimation*)getShakeAnimation { CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"]; CGFloat wobbleAngle = 0.06f; NSValue* valLeft = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(wobbleAngle, 0.0f, 0.0f, 1.0f)]; NSValue* valRight = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(-wobbleAngle, 0.0f, 0.0f, 1.0f)]; animation.values = [NSArray arrayWithObjects:valLeft, valRight, nil]; animation.autoreverses = YES; animation.duration = 0.125; animation.repeatCount = HUGE_VALF; return animation; } </code></pre>
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