두개의 비디오 합치기

http://www.mindfiresolutions.com/Merging-Two-Videos--iPhoneiPad-Tip--1396.php

Suppose you have two video files with name video1.mp4 and video2.mp4 and want to merge them into a single video programmatically this tip might help you. Follow the instructions given below-   First, we need to add following frameworks in our project: a)AVFoundation  framework  b)Asset Library framework  c)Media Player Framework d)Core Media frame work   Then we need to import following in the view controller class :

#import <MediaPlayer/MediaPlayer.h> #import <CoreMedia/CoreMedia.h> #import <AVFoundation/AVFoundation.h> #import <CoreFoundation/CoreFoundation.h> #import <AVFoundation/AVBase.h> @implementation MyVideoViewController  - (void) mergeTwoVideo {     AVMutableComposition* composition = [AVMutableCompositioncomposition]; NSString* path1 = [[NSBundlemainBundle] pathForResource:@"video1"ofType:@"mp4"]; NSString* path2 = [[NSBundlemainBundle] pathForResource:@"video2"ofType:@"mp4"];  AVURLAsset* video1 = [[AVURLAssetalloc]initWithURL:[NSURLfileURLWithPath:path1] options:nil];     AVURLAsset* video2 = [[AVURLAssetalloc]initWithURL:[NSURLfileURLWithPath:path2] options:nil];     AVMutableCompositionTrack * composedTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo                                                                        preferredTrackID:kCMPersistentTrackID_Invalid];          [composedTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, video1.duration)                          ofTrack:[[video1 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]                           atTime:kCMTimeZero                            error:nil];     [composedTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, video2.duration)                           ofTrack:[[video2 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]                            atTime:video1.duration                            error:nil];     NSString* documentsDirectory= [selfapplicationDocumentsDirectory]; NSString* myDocumentPath= [documentsDirectory stringByAppendingPathComponent:@"merge_video.mp4"]; NSURL *url = [[NSURL alloc] initFileURLWithPath: myDocumentPath];      if([[NSFileManagerdefaultManager] fileExistsAtPath:myDocumentPath])     {         [[NSFileManagerdefaultManager] removeItemAtPath:myDocumentPath error:nil];     } VAssetExportSession *exporter = [[[AVAssetExportSessionalloc] initWithAsset:composition presetName:AVAssetExportPresetHighestQuality] autorelease];   exporter.outputURL=url;    exporter.outputFileType = @"com.apple.quicktime-movie";     exporter.shouldOptimizeForNetworkUse = YES;     [exporter exportAsynchronouslyWithCompletionHandler:^{          switch ([exporter status]) {              caseAVAssetExportSessionStatusFailed:                  break;              caseAVAssetExportSessionStatusCancelled:                  break;              caseAVAssetExportSessionStatusCompleted:                 break;             default:                 break;         }      }];  }  // The import will be completed only when control reaches to  Handler block     - (NSString*) applicationDocumentsDirectory {     NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);     NSString* basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;     return basePath; }