merging 2 audio files caf using AVFoundation in iOS 9 - ios

Question

Hi I am just facing this issue in iOS 9.. I am trying to merge 2 caf files and all was working fine in iOS 8 but when I test app on iOS 9 it is not working expectedly.. only one file played when I play final merged file.. Any kind of help will be appreciatedA
AVMutableComposition *composition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack setPreferredVolume:1.0];
NSURL *url = [NSURL fileURLWithPath:[url3 path]];
AVAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
AVAssetTrack *clipAudioTrack = [[avAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset.duration) ofTrack:clipAudioTrack atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack *compositionAudioTrack1 = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack1 setPreferredVolume:1.0];
NSURL *url1 = [NSURL fileURLWithPath:[url12 path]];
AVAsset *avAsset1 = [AVURLAsset URLAssetWithURL:url1 options:nil];
AVAssetTrack *clipAudioTrack1 = [[avAsset1 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTrack1 insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset1.duration) ofTrack:clipAudioTrack1 atTime:kCMTimeZero error:nil];
AVAssetExportSession *exportSession = [AVAssetExportSession
exportSessionWithAsset:composition
presetName:AVAssetExportPresetAppleM4A];
//NSLog(#"Output file path - %#",soundOneNew);
// configure export session output with all our parameters
exportSession.outputURL = [NSURL fileURLWithPath:soundOneNew]; // output path
exportSession.outputFileType = AVFileTypeAppleM4A; // output file type
// perform the export
NSLog(#"AVAssetExportSessionStatusCompleted");
[exportSession exportAsynchronouslyWithCompletionHandler:^{
if (AVAssetExportSessionStatusCompleted == exportSession.status) {
NSData *newAudiofound = [NSData dataWithContentsOfURL:exportSession.outputURL];
[newAudiofound writeToFile:[finalURLAudio path] atomically:YES];
[self playAudio:exportSession.outputURL];
} else if (AVAssetExportSessionStatusFailed == exportSession.status) {
// a failure may happen because of an event out of your control
// for example, an interruption like a phone call comming in
// make sure and handle this case appropriately
NSLog(#"AVAssetExportSessionStatusFailed");
} else {
NSLog(#"Export Session Status: %d", exportSession.status);
}
}];

Answer 1

-(void)mergesound{
NSURL *audio_url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"1" ofType:#"m4a"]];
AVMutableComposition *composition = [[AVMutableComposition alloc] init];
CMTime currentTime = kCMTimeZero;
AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack setPreferredVolume:1.0];
AVAsset *avAsset = [AVURLAsset URLAssetWithURL:audio_url options:nil];
AVAssetTrack *clipAudioTrack = [[avAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset.duration) ofTrack:clipAudioTrack atTime:kCMTimeZero error:nil];
AVAsset *avAsset1 = [AVURLAsset URLAssetWithURL:audio_url options:nil];
AVAssetTrack *clipAudioTrack1 = [[avAsset1 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
currentTime = CMTimeAdd(currentTime, avAsset.duration);
[compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset1.duration) ofTrack:clipAudioTrack1 atTime:currentTime error:nil];
AVAssetExportSession *exportSession = [AVAssetExportSession
exportSessionWithAsset:composition
presetName:AVAssetExportPresetAppleM4A];
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *outputFilePath = [docsDir stringByAppendingPathComponent:[NSString stringWithFormat:#"FinalVideo.m4a"]];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
exportSession.outputURL = [NSURL fileURLWithPath:outputFilePath]; // output path
exportSession.outputFileType = AVFileTypeAppleM4A; // output file type
// perform the export
NSLog(#"AVAssetExportSessionStatusCompleted");
[exportSession exportAsynchronouslyWithCompletionHandler:^{
if (AVAssetExportSessionStatusCompleted == exportSession.status)
{
NSData *newAudiofound = [NSData dataWithContentsOfURL:exportSession.outputURL];
[newAudiofound writeToFile:outputFilePath atomically:YES];
// [self playAudio:exportSession.outputURL];
} else if (AVAssetExportSessionStatusFailed == exportSession.status) {
// a failure may happen because of an event out of your control
// for example, an interruption like a phone call comming in
// make sure and handle this case appropriately
NSLog(#"AVAssetExportSessionStatusFailed");
} else {
NSLog(#"Export Session Status: %d", exportSession.status);
}
}];
}

Answer 2

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path1;
NSString *path2;
path1 = [NSString stringWithFormat:#"%#/firstPart.caf",documentsDirectory];
path2 = [NSString stringWithFormat:#"%#/newRecording.caf",documentsDirectory];
AVAsset *avAsset1 = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:path1] options:nil];
AVAsset *avAsset2 = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:path2] options:nil];
AVMutableComposition *composition = [[AVMutableComposition alloc] init];
if (version < 9.0) {
[composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
}
AVMutableCompositionTrack *track = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *assetTrack1;
AVAssetTrack *assetTrack2;
if ([avAsset1 tracksWithMediaType:AVMediaTypeAudio].count > 0) {
assetTrack1 = [[avAsset1 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
assetTrack2 = [[avAsset2 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
}
CMTime insertionPoint = kCMTimeZero;
[track insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset1.duration) ofTrack:assetTrack1 atTime:insertionPoint error:nil];
insertionPoint = CMTimeAdd(insertionPoint, avAsset1.duration);
[track insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset2.duration) ofTrack:assetTrack2 atTime:insertionPoint error:nil];
NSURL *outPutUrl = [NSURL fileURLWithPath:[NSString stringWithFormat:#"%#/mergedFilePart1.caf",documentsDirectory]];
AVAssetExportSession *exportSession = [AVAssetExportSession exportSessionWithAsset:composition presetName:AVAssetExportPresetAppleM4A];
exportSession.outputURL = outPutUrl;
exportSession.outputFileType = AVFileTypeAppleM4A;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
if (AVAssetExportSessionStatusCompleted == exportSession.status) {
NSLog(#"AVAssetExportSessionStatusCompleted");
[self mergeAudioPart2];
}
else if (AVAssetExportSessionStatusFailed == exportSession.status)
{
NSLog(#"%ld",(long)exportSession.status);
NSLog(#"AVAssetExportSessionStatusFailed");
}
else
{
NSLog(#"Export Session Status: %ld", (long)exportSession.status);
}
}];
replace your code with this.