Merge Video Side by Side in sequence mode

Question

I merge two videos side by side in sequence mode by using AVMutableComposition, play two videos one after another, I can do this successfully. My problem is that while Playing the first video, the second video screen will display a blank screen until it completes the first video. Can anyone give me a solution to show the thumbnail image of the second video while playing the first one?

Answer 1

We can display the thumbnail image on the video by using the following code.

CALayer *firstThumbnailOverlay=[CALayer layer]; 
CABasicAnimation *firstfadeAnimation;

firstfadeAnimation=[CABasicAnimation animationWithKeyPath:@"opacity"];

firstfadeAnimation.fromValue = [NSNumber numberWithFloat:1.0];
firstfadeAnimation.toValue = [NSNumber numberWithFloat:0.0];
firstfadeAnimation.additive = NO;
firstfadeAnimation.removedOnCompletion = NO;
firstfadeAnimation.beginTime = CMTimeGetSeconds(firstAsset.duration);
firstfadeAnimation.duration = 0.0;
firstfadeAnimation.fillMode = kCAFillModeBoth;
[firstThumbnailOverlay addAnimation:firstfadeAnimation forKey:Nil];
[parentLayer addSublayer:firstThumbnailOverlay];

Answer 2

Have you tried using https://developer.apple.com/library/mac/documentation/AVFoundation/Reference/AVAssetImageGenerator_Class/Reference/Reference.html and just a plain UIImageView containing the Thumbnail?