avmutablecomposition

In my application I need to merge audio and video and then I need to play the audio file in the Mediaplayer. How can I merge the audio and video in IOS. Is there is any source code for this. Please suggest me some ideas Thanks in advance Use this AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audioUrl options:nil]; AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:videoUrl options:nil]; AVMutableComposition* mixComposition = [AVMutableComposition composition]; AVMutableCompositionTrack *compositionCommentaryTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio

This SO answer addresses how to do a screen capture of a UIView . We need something similar, but instead of a single image, the goal is to produce a video of everything appearing within a UIView over 60 seconds -- conceptually like recording only the layers of that UIView , ignoring other layers. Our video app superimposes layers on whatever the user is recording, and the ultimate goal is to produce a master video merging those layers with the original video. However, using AVVideoCompositionCoreAnimationTool to merge layers with the original video is very, very, very slow: exporting a 60

I have found a few examples that show how to add a text overlay on a video. Ray's Tutorial - http://www.raywenderlich.com/30200/avfoundation-tutorial-adding-overlays-and-animations-to-videos This SO answer - How can I add a watermark in a captured video on iOS There were a few others that I referenced as well. My code looks almost identical to that answer and I've been trying to tweak it to get the text overlay to only show up for a second or two at the beginning of the video. Any help on how I could accomplish that? Here is my code. This works as is to export the video with the overlay being

I have to export a movie from my iPhone application which contains UIImage from an NSArray and add some audio files in .caf format that have to start at pre-specified times. Now I have been able to use the AVAssetWriter (after going through many questions and answers on this and other sites) to export the video portion containing the images but cant seem to find a way to add the audio files to complete the movie. Here is what I have gotten so far -(void) writeImagesToMovieAtPath:(NSString *) path withSize:(CGSize) size { NSLog(@"Write Started"); NSError *error = nil; AVAssetWriter *videoWriter