CAScrollLayer not working on Video - ios

Question

I am trying to create image animation on Video with the help of CAScrollLayer I am able to add images on CAScrollLayer but it's not scrolling when video is played any help will be appreciable below is my code i have tried so far.
CALayer *layer;
// self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
scrollLayer = [CAScrollLayer layer];
scrollLayer.backgroundColor = [[UIColor blackColor] CGColor];
scrollLayer.bounds = parentLayer.bounds;
scrollLayer.contentsRect = CGRectMake(0, 0, scrollLayer.bounds.size.width*images.count, scrollLayer.bounds.size.height);
scrollLayer.borderWidth = 2.5;
scrollLayer.borderColor = [[UIColor redColor] CGColor];
scrollLayer.position = CGPointMake(self.view.center.x, self.view.center.y - 20);
scrollLayer.scrollMode = kCAScrollHorizontally;
scrollLayer.speed = 2.0;
// [self.view.layer addSublayer:scrollLayer];
[parentLayer insertSublayer:scrollLayer atIndex:0];
for(int i=0; i<[images count]; i++) {
UIImage *image = [images objectAtIndex:i];
layer = [CALayer layer];
layer.backgroundColor = [[UIColor blackColor] CGColor];
layer.bounds = CGRectMake(0, 0, 300, 300);
layer.contents = (id)[image CGImage];
layer.position = CGPointMake(layer.bounds.size.width * i, self.view.center.y);
// scrollLayer.speed = 2.0;
[scrollLayer addSublayer:layer];
}
[parentLayer addSublayer:scrollLayer];
[self performSelector:#selector(scrollPoint) withObject:nil afterDelay:2.0];
compostion.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
Thank you.