Merge Two Video files in iPhone Application - iphone

Question

In One of my application i need to add some image in video. so i cut break video in two part and also make one video from that image. now i want to combine this three video file and make one video file. but i am not get any idea to combine this three video. i see some code over here. but that is not helpful to me. for break video and for make video from image i used below code now i want code to merge this all video.
Any other idea for put current view screen in video file in between.
For break video file
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"Affagogato" ofType:#"mp4"]];
AVURLAsset *anAsset = [[AVURLAsset alloc] initWithURL:url options:nil];
for(int i = 0; i < 2; i++) {
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]
initWithAsset:anAsset presetName:AVAssetExportPresetLowQuality];
NSString *filePath = nil;
NSUInteger count = 0;
do {
filePath = NSTemporaryDirectory();
NSString *numberString = count > 0 ? [NSString stringWithFormat:#"-%i", count] : #"";
filePath = [filePath stringByAppendingPathComponent:[NSString stringWithFormat:#"Output-%#.mov", numberString]];
count++;
} while([[NSFileManager defaultManager] fileExistsAtPath:filePath]);
exportSession.outputURL = [NSURL fileURLWithPath:filePath];
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTimeRange range;
if(i == 0){
CMTime start = CMTimeMakeWithSeconds(0.0, 600);
CMTime duration = CMTimeMakeWithSeconds(10.0, 600);
range = CMTimeRangeMake(start, duration);
}else{
CMTime start = CMTimeMakeWithSeconds(10.0, 600);
range = CMTimeRangeMake(start, anAsset.duration);
}
exportSession.timeRange = range;
[exportSession exportAsynchronouslyWithCompletionHandler:^
{
dispatch_async(dispatch_get_main_queue(), ^{
[self exportDidFinish:exportSession Tag:i];
});
}];
}
Get video from Images
CGRect rect=CGRectMake(0, 0, 320, 480);
view = [[UIView alloc]initWithFrame:rect];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *path = [documentsDirectory stringByAppendingPathComponent:[#"video2" stringByAppendingString:#".mov"]];
CGSize size = self.view.frame.size;
NSMutableDictionary *attributes = [[NSMutableDictionary alloc]init];
[attributes setObject:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_32ARGB] forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey];
[attributes setObject:[NSNumber numberWithUnsignedInt:320] forKey:(NSString*)kCVPixelBufferWidthKey];
[attributes setObject:[NSNumber numberWithUnsignedInt:480] forKey:(NSString*)kCVPixelBufferHeightKey];
NSError *error = nil;
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:
[NSURL fileURLWithPath:path] fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264, AVVideoCodecKey,
[NSNumber numberWithInt:size.width], AVVideoWidthKey,
[NSNumber numberWithInt:size.height], AVVideoHeightKey,
nil];
AVAssetWriterInput* writerInput = [[AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings] retain];
AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInput
sourcePixelBufferAttributes:nil];
NSParameterAssert(writerInput);
NSParameterAssert([videoWriter canAddInput:writerInput]);
[videoWriter addInput:writerInput];
//Start a session:
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//convert uiimage to CGImage.
xPixel=0;
yPixel=250;
buffer = [self pixelBufferFromCGImage:[[UIImage imageNamed:#"1.jpeg"] CGImage]];
CVPixelBufferPoolCreatePixelBuffer (NULL, adaptor.pixelBufferPool, &buffer);
[adaptor appendPixelBuffer:buffer withPresentationTime:kCMTimeZero];
for (int i = 0;i<2; i++)
{
if([writerInput isReadyForMoreMediaData])
{
//NSLog(#"inside for loop %d",i);
for(int pframetime=1;pframetime<=2;pframetime++)
{
CMTime frameTime = CMTimeMake(pframetime,25);
CMTime lastTime=CMTimeMake(i,1); //i is from 0 to 19 of the loop above
CMTime presentTime=CMTimeAdd(lastTime, frameTime);
if(i==0)
buffer = [self pixelBufferFromCGImage:[[UIImage imageNamed:#"1.jpeg"] CGImage]];
else
buffer = [self pixelBufferFromCGImage:[[UIImage imageNamed:#"2.jpeg"] CGImage]];
while ( ![writerInput isReadyForMoreMediaData] )
{
[NSThread sleepForTimeInterval:0.05];
}
[adaptor appendPixelBuffer:buffer withPresentationTime:presentTime];
i++;
}
if(buffer)
CVBufferRelease(buffer);
//[NSThread sleepForTimeInterval:0.1];
}
}
[writerInput markAsFinished];
[videoWriter finishWriting];
[videoPathArray addObject:path];
//Finish the session:
[videoWriter release];
[writerInput release];
CVPixelBufferPoolRelease(adaptor.pixelBufferPool);
For Merge video files i try this code but not useful here is some blank screen between video
AVMutableComposition* mixComposition = [AVMutableComposition composition];
NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* video_inputFilePath1 = [videoPathArray objectAtIndex:1];
NSURL* video_inputFileUrl1 = [NSURL fileURLWithPath:video_inputFilePath1];
NSString* video_inputFilePath2 = [videoPathArray objectAtIndex:0];
NSURL* video_inputFileUrl2 = [NSURL fileURLWithPath:video_inputFilePath2];
NSString* video_inputFilePath3 = [videoPathArray objectAtIndex:2];
NSURL* video_inputFileUrl3 = [NSURL fileURLWithPath:video_inputFilePath3];
NSString* outputFileName = #"outputFile.mov";
NSString* outputFilePath = [NSString stringWithFormat:#"%#/%#",documentsDirectoryPath,outputFileName];
NSURL* outputFileUrl = [NSURL fileURLWithPath:outputFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
CMTime nextClipStartTime = kCMTimeZero;
AVURLAsset* videoAsset1 = [[AVURLAsset alloc]initWithURL:video_inputFileUrl1 options:nil];
AVURLAsset* videoAsset2 = [[AVURLAsset alloc]initWithURL:video_inputFileUrl2 options:nil];
AVURLAsset* videoAsset3 = [[AVURLAsset alloc]initWithURL:video_inputFileUrl3 options:nil];
CMTimeRange video_timeRange1 = CMTimeRangeMake(kCMTimeZero,videoAsset1.duration);
AVMutableCompositionTrack *a_compositionVideoTrack1 = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[a_compositionVideoTrack1 insertTimeRange:video_timeRange1 ofTrack:[[videoAsset1 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:nextClipStartTime error:nil];
CMTimeRange video_timeRange3 = CMTimeRangeMake(nextClipStartTime,videoAsset3.duration);
[a_compositionVideoTrack1 insertTimeRange:video_timeRange3 ofTrack:[[videoAsset3 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:videoAsset1.duration error:nil];
CMTimeRange video_timeRange2 = CMTimeRangeMake(nextClipStartTime,videoAsset1.duration);
[a_compositionVideoTrack1 insertTimeRange:video_timeRange2 ofTrack:[[videoAsset2 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:videoAsset1.duration error:nil];
AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetLowQuality];
_assetExport.shouldOptimizeForNetworkUse = YES;
_assetExport.outputFileType = #"com.apple.quicktime-movie";
_assetExport.outputURL = outputFileUrl;

Answer 1

Try watching the video called "Working with Media in AV Foundation" in the apple developers portal. It tells you how to do what you are describing.
https://developer.apple.com/videos/wwdc/2011/