你可以试试这个一个
- (void)MergeAndSave
{
for(int i=0;i< [arrSelectedUrls count];i++)
{
NSURL *url;
CALayer * parentLayer;
CALayer * videoLayer;
AVSynchronizedLayer *animationLayer = [AVSynchronizedLayer layer];
UIImage *image1 = [UIImage imageNamed:@"Fire1.jpeg"];
UIImage *image2 = [UIImage imageNamed:@"Fire2.jpeg"];
UIImage *image3 = [UIImage imageNamed:@"Fire3.jpeg"];
UIImage *image4 = [UIImage imageNamed:@"Fire4.jpeg"];
//int numberOfFile = [arrSelectedUrls count]; // Number Of Video You want to merge
AVMutableComposition* mixComposition = [[AVMutableComposition alloc] init];
NSMutableArray *starImageArray = [NSMutableArray arrayWithObjects:(id)image1.CGImage,(id)image2.CGImage,(id)image3.CGImage,(id)image4.CGImage, nil];
NSMutableArray *arrDuration = [[NSMutableArray alloc] init];
NSMutableArray *arrayInstruction = [[NSMutableArray alloc] init];
AVMutableVideoCompositionInstruction * MainInstruction =
[AVMutableVideoCompositionInstruction videoCompositionInstruction];
AVMutableCompositionTrack *audioTrack;
audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
CMTime duration = kCMTimeZero;
AVAsset *currentAsset = [AVAsset assetWithURL:[arrSelectedUrls objectAtIndex:i]]; // i take the for loop for geting the asset
/* Current Asset is the asset of the video From the Url Using AVAsset */
// AVURLAsset *newAudioAsset = [AVURLAsset URLAssetWithURL:[arrSelectedUrls objectAtIndex:i] options:nil];
BOOL hasAudio = [currentAsset tracksWithMediaType:AVMediaTypeAudio].count > 0;
AVMutableCompositionTrack *currentTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:i];
// [currentTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:duration error:nil];
[currentTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:duration error:nil];
//
//// [audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
// audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
//
// // [audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, mixComposition.duration) ofTrack:[[mixComposition tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
if(hasAudio)
{
[audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, mixComposition.duration) ofTrack:[[mixComposition tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
}
float sect = CMTimeGetSeconds(currentAsset.duration);
NSString *strSect = [NSString stringWithFormat:@"%f",sect];
[arrDuration addObject:@"0.5"];
[arrDuration addObject:@"0.5"];
[arrDuration addObject:@"0.5"];
[arrDuration addObject:@"0.5"];
AVMutableVideoCompositionLayerInstruction *currentAssetLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:currentTrack];
AVAssetTrack *currentAssetTrack = [[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
UIImageOrientation currentAssetOrientation = UIImageOrientationUp;
BOOL isCurrentAssetPortrait = NO;
CGAffineTransform currentTransform = currentAssetTrack.preferredTransform;
if(currentTransform.a == 0 && currentTransform.b == 1.0 && currentTransform.c == -1.0 && currentTransform.d == 0) {currentAssetOrientation= UIImageOrientationRight; isCurrentAssetPortrait = YES;}
if(currentTransform.a == 0 && currentTransform.b == -1.0 && currentTransform.c == 1.0 && currentTransform.d == 0) {currentAssetOrientation = UIImageOrientationLeft; isCurrentAssetPortrait = YES;}
if(currentTransform.a == 1.0 && currentTransform.b == 0 && currentTransform.c == 0 && currentTransform.d == 1.0) {currentAssetOrientation = UIImageOrientationUp;}
if(currentTransform.a == -1.0 && currentTransform.b == 0 && currentTransform.c == 0 && currentTransform.d == -1.0) {currentAssetOrientation = UIImageOrientationDown;}
CGFloat FirstAssetScaleToFitRatio = 320.0/320.0;
if(isCurrentAssetPortrait){
FirstAssetScaleToFitRatio = 320.0/320.0;
CGAffineTransform FirstAssetScaleFactor = CGAffineTransformMakeScale(FirstAssetScaleToFitRatio,FirstAssetScaleToFitRatio);
[currentAssetLayerInstruction setTransform:CGAffineTransformConcat(currentAssetTrack.preferredTransform, FirstAssetScaleFactor) atTime:duration];
}else{
CGAffineTransform FirstAssetScaleFactor = CGAffineTransformMakeScale(FirstAssetScaleToFitRatio,FirstAssetScaleToFitRatio);
[currentAssetLayerInstruction setTransform:CGAffineTransformConcat(CGAffineTransformConcat(currentAssetTrack.preferredTransform, FirstAssetScaleFactor),CGAffineTransformMakeTranslation(0, 0)) atTime:duration];
}
duration=CMTimeAdd(duration, currentAsset.duration);
[currentAssetLayerInstruction setOpacity:0.0 atTime:duration];
[arrayInstruction addObject:currentAssetLayerInstruction];
NSLog(@"%lld", duration.value/duration.timescale);
CATextLayer *titleLayer = [CATextLayer layer];
titleLayer.string = [NSString stringWithFormat:@"Final%@",[Titlearry objectAtIndex:i]];
CGSize videoSize = [currentAssetTrack naturalSize];
titleLayer.fontSize = videoSize.height/14;
titleLayer.shadowOpacity = 0.5;
titleLayer.alignmentMode = kCAAlignmentRight;
titleLayer.bounds = CGRectMake(0, 0, 320, 500); //You may need to adjust this for proper display
parentLayer = [CALayer layer];
videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:titleLayer];
// new addition From Ritesh //
double time1 = 0.01;
// in ms, (0.2*1000)/1000 == 200/1000 == 0.2
// CMTime time2 = CMTimeMake(time1*1000, 1000);
NSMutableArray * keyTimesArray = [[NSMutableArray alloc]init];
for (int z = 1; z<4; z++)
{
NSNumber *temp = [NSNumber numberWithFloat:(time1+(float)z/30)];
[keyTimesArray addObject:temp];
}
animationLayer.opacity = 1.0;
// animationLayer.backgroundColor = [UIColor yellowColor].CGColor;
[animationLayer setFrame:CGRectMake(0, 0, 320, 50)];
[parentLayer addSublayer:animationLayer];
CAKeyframeAnimation *changeImageAnimation = [CAKeyframeAnimation animationWithKeyPath:@"contents"];
[changeImageAnimation setDelegate:self];
changeImageAnimation.calculationMode = kCAAnimationDiscrete;
[animationLayer setContents:[starImageArray lastObject]];
changeImageAnimation.duration = 10.0f;
changeImageAnimation.repeatCount = 30;
changeImageAnimation.values = [NSArray arrayWithArray:starImageArray];
//changeImageAnimation.removedOnCompletion = YES;
// [changeImageAnimation setKeyTimes:arrDuration];
[changeImageAnimation setBeginTime:1.0];
[changeImageAnimation setRemovedOnCompletion:NO];
[changeImageAnimation setDelegate:self];
[animationLayer addAnimation:changeImageAnimation forKey:@"contents"];
MainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, duration);
MainInstruction.layerInstructions = arrayInstruction;
AVMutableVideoComposition *MainCompositionInst = [AVMutableVideoComposition videoComposition];
MainCompositionInst.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
MainCompositionInst.instructions = [NSArray arrayWithObject:MainInstruction];
MainCompositionInst.frameDuration = CMTimeMake(1,30);
MainCompositionInst.renderSize = CGSizeMake(320.0, 320.0);
// NSString *myPathDocs = [[[AppDelegate sharedAppDelegate] applicationCacheDirectory] stringByAppendingPathComponent:[NSString stringWithFormat:@"mergeVideo%-dtemp.mp4",arc4random() % 10000]];
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *outputFilePath = [docsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"merge%@.mov",[Titlearry objectAtIndex:i]]];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
url = [NSURL fileURLWithPath:outputFilePath];
[UrlArray addObject:outputFilePath];
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
exporter.outputURL=url;
exporter.outputFileType = AVFileTypeQuickTimeMovie;
exporter.videoComposition = MainCompositionInst;
exporter.shouldOptimizeForNetworkUse = YES;
[exporter exportAsynchronouslyWithCompletionHandler:^
{
switch (exporter.status)
{
case AVAssetExportSessionStatusCompleted:
{
if(i == [arrSelectedUrls count]-1)
{
[self mergeAllVideoClipscompletionCallback];
}
}
break;
case AVAssetExportSessionStatusFailed:
NSLog(@"Failed:%@", exporter.error.description);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Canceled:%@", exporter.error);
break;
case AVAssetExportSessionStatusExporting:
NSLog(@"Exporting!");
break;
case AVAssetExportSessionStatusWaiting:
NSLog(@"Waiting");
break;
default:
break;
}
}];
}
// [self performSelector:@selector(MergeAndExport) withObject:nil afterDelay:3.0];
// [self MergeAndExport];
}
-(void)MergeAndExport
{
CALayer * parentLayer;
CALayer * videoLayer;
//int numberOfFile = [arrSelectedUrls count]; // Number Of Video You want to merge
AVMutableComposition* mixComposition = [[AVMutableComposition alloc] init];
NSMutableArray *arrayInstruction = [[NSMutableArray alloc] init];
AVMutableVideoCompositionInstruction * MainInstruction =
[AVMutableVideoCompositionInstruction videoCompositionInstruction];
AVMutableCompositionTrack *audioTrack;
audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
CMTime duration = kCMTimeZero;
for(int i=0;i< [arrSelectedUrls count];i++)
{
// AVAsset *currentAsset = [AVAsset assetWithURL:[arrSelectedUrls objectAtIndex:i]];
NSURL *url=[NSURL fileURLWithPath:[UrlArray objectAtIndex:i]];
AVURLAsset *currentAsset=[AVURLAsset URLAssetWithURL:url options:nil];
// i take the for loop for geting the asset
/* Current Asset is the asset of the video From the Url Using AVAsset */
// AVURLAsset *newAudioAsset = [AVURLAsset URLAssetWithURL:[arrSelectedUrls objectAtIndex:i] options:nil];
BOOL hasAudio = [currentAsset tracksWithMediaType:AVMediaTypeAudio].count > 0;
AVMutableCompositionTrack *currentTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[currentTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:duration error:nil];
[currentTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:duration error:nil];
// audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
// [audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, mixComposition.duration) ofTrack:[[mixComposition tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
if(hasAudio)
{
[audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:[[currentAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, mixComposition.duration) ofTrack:[[mixComposition tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:duration error:nil];
}
AVMutableVideoCompositionLayerInstruction *currentAssetLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:currentTrack];
AVAssetTrack *currentAssetTrack = [[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
UIImageOrientation currentAssetOrientation = UIImageOrientationUp;
BOOL isCurrentAssetPortrait = NO;
CGAffineTransform currentTransform = currentAssetTrack.preferredTransform;
if(currentTransform.a == 0 && currentTransform.b == 1.0 && currentTransform.c == -1.0 && currentTransform.d == 0) {currentAssetOrientation= UIImageOrientationRight; isCurrentAssetPortrait = YES;}
if(currentTransform.a == 0 && currentTransform.b == -1.0 && currentTransform.c == 1.0 && currentTransform.d == 0) {currentAssetOrientation = UIImageOrientationLeft; isCurrentAssetPortrait = YES;}
if(currentTransform.a == 1.0 && currentTransform.b == 0 && currentTransform.c == 0 && currentTransform.d == 1.0) {currentAssetOrientation = UIImageOrientationUp;}
if(currentTransform.a == -1.0 && currentTransform.b == 0 && currentTransform.c == 0 && currentTransform.d == -1.0) {currentAssetOrientation = UIImageOrientationDown;}
CGFloat FirstAssetScaleToFitRatio = 320.0/320.0;
if(isCurrentAssetPortrait){
FirstAssetScaleToFitRatio = 320.0/320.0;
CGAffineTransform FirstAssetScaleFactor = CGAffineTransformMakeScale(FirstAssetScaleToFitRatio,FirstAssetScaleToFitRatio);
[currentAssetLayerInstruction setTransform:CGAffineTransformConcat(currentAssetTrack.preferredTransform, FirstAssetScaleFactor) atTime:duration];
}else{
CGAffineTransform FirstAssetScaleFactor = CGAffineTransformMakeScale(FirstAssetScaleToFitRatio,FirstAssetScaleToFitRatio);
[currentAssetLayerInstruction setTransform:CGAffineTransformConcat(CGAffineTransformConcat(currentAssetTrack.preferredTransform, FirstAssetScaleFactor),CGAffineTransformMakeTranslation(0, 0)) atTime:duration];
}
duration=CMTimeAdd(duration, currentAsset.duration);
[currentAssetLayerInstruction setOpacity:0.0 atTime:duration];
[arrayInstruction addObject:currentAssetLayerInstruction];
NSLog(@"%lld", duration.value/duration.timescale);
CATextLayer *titleLayer = [CATextLayer layer];
titleLayer.string = @"www.miivdo.com";
//titleLayer.backgroundColor = (__bridge CGColorRef)([UIColor redColor]);
CGSize videoSize = [currentAssetTrack naturalSize];
titleLayer.fontSize = videoSize.height/14;
// titleLayer.foregroundColor = (__bridge CGColorRef)([UIColor redColor]);
titleLayer.shadowOpacity = 0.5;
titleLayer.alignmentMode = kCAAlignmentRight;
titleLayer.bounds = CGRectMake(0, 0, 320, 50); //You may need to adjust this for proper display
parentLayer = [CALayer layer];
videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:titleLayer];
}
MainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, duration);
MainInstruction.layerInstructions = arrayInstruction;
AVMutableVideoComposition *MainCompositionInst = [AVMutableVideoComposition videoComposition];
MainCompositionInst.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
MainCompositionInst.instructions = [NSArray arrayWithObject:MainInstruction];
MainCompositionInst.frameDuration = CMTimeMake(1, 30);
MainCompositionInst.renderSize = CGSizeMake(320.0, 320.0);
// NSString *myPathDocs = [[[AppDelegate sharedAppDelegate] applicationCacheDirectory] stringByAppendingPathComponent:[NSString stringWithFormat:@"mergeVideo%-dtemp.mp4",arc4random() % 10000]];
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *outputFilePath = [docsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"merge.mov"]];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
NSURL *url = [NSURL fileURLWithPath:outputFilePath];
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
exporter.outputURL=url;
exporter.outputFileType = AVFileTypeQuickTimeMovie;
exporter.videoComposition = MainCompositionInst;
exporter.shouldOptimizeForNetworkUse = YES;
[exporter exportAsynchronouslyWithCompletionHandler:^
{
switch (exporter.status)
{
case AVAssetExportSessionStatusCompleted:
{
NSURL *outputURL = exporter.outputURL;
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:outputURL]) {
[self writeExportedVideoToAssetsLibrary:outputURL];
//
}
}
break;
case AVAssetExportSessionStatusFailed:
NSLog(@"Failed:%@", exporter.error.description);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Canceled:%@", exporter.error);
break;
case AVAssetExportSessionStatusExporting:
NSLog(@"Exporting!");
break;
case AVAssetExportSessionStatusWaiting:
NSLog(@"Waiting");
break;
default:
break;
}
}];
}
那你试试？ – prasun