私は見て、答えを探しましたが、見つけられないようです。たくさんの人が尋ねましたが、答えを得た人はいませんでした。 AVAudioRecorderを使ってオーディオを記録するアプリがあります。今では、2つ以上の録音を1つのファイルにマージして、電子メールで送信できます。誰にどのようにこれを行うことができますか？iPhoneで2つの.cafファイルを結合する
（This answerオーディオサービスキューと呼ばれるものを用いることが提案されているが、私はそれについて何も知らない）
それはあなたが思うだろうほど簡単ではありません。私は、を使用して、iAmRingtonesを作成しようとしていることを正確に行いました。オーディオファイルからAVAssetsを作成し、AVExportSessionを設定する必要がありました。最終結果は素晴らしかったが、確かに少しの作業が必要だった。ここでは、我々のアプリにエクスポート機能を作成する方法、多かれ少なかれです：
- (void) setUpAndAddAudioAtPath:(NSURL*)assetURL toComposition:(AVMutableComposition *)composition {
AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil];
AVMutableCompositionTrack *track = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *sourceAudioTrack = [[songAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
NSError *error = nil;
BOOL ok = NO;
CMTime startTime = CMTimeMakeWithSeconds(0, 1);
CMTime trackDuration = songAsset.duration;
CMTime longestTime = CMTimeMake(848896, 44100); //(19.24 seconds)
CMTimeRange tRange = CMTimeRangeMake(startTime, trackDuration);
//Set Volume
AVMutableAudioMixInputParameters *trackMix = [AVMutableAudioMixInputParameters audioMixInputParametersWithTrack:track];
[trackMix setVolume:0.8f atTime:startTime];
[audioMixParams addObject:trackMix];
//Insert audio into track
ok = [track insertTimeRange:tRange ofTrack:sourceAudioTrack atTime:CMTimeMake(0, 44100) error:&error];
}
上記の方法は、以下の方法から2回（一回、各オーディオトラックの場合）に呼び出されます：
いずれかをマージする方法- (void) exportAudio {
AVMutableComposition *composition = [AVMutableComposition composition];
audioMixParams = [[NSMutableArray alloc] initWithObjects:nil];
//Add Audio Tracks to Composition
NSString *URLPath1 = pathToYourAudioFile1;
NSURL *assetURL1 = [NSURL fileURLWithPath:URLPath1];
[self setUpAndAddAudioAtPath:assetURL1 toComposition:composition];
NSString *URLPath2 = pathToYourAudioFile2;
NSURL *assetURL2 = [NSURL fileURLWithPath:URLPath2];
[self setUpAndAddAudioAtPath:assetURL2 toComposition:composition];
AVMutableAudioMix *audioMix = [AVMutableAudioMix audioMix];
audioMix.inputParameters = [NSArray arrayWithArray:audioMixParams];
//If you need to query what formats you can export to, here's a way to find out
NSLog (@"compatible presets for songAsset: %@",
[AVAssetExportSession exportPresetsCompatibleWithAsset:composition]);
AVAssetExportSession *exporter = [[AVAssetExportSession alloc]
initWithAsset: composition
presetName: AVAssetExportPresetAppleM4A];
exporter.audioMix = audioMix;
exporter.outputFileType = @"com.apple.m4a-audio";
NSString *fileName = @"someFilename";
NSString *exportFile = [[util getDocumentsDirectory] stringByAppendingFormat: @"/%@.m4a", fileName];
// set up export
myDeleteFile(exportFile);
NSURL *exportURL = [NSURL fileURLWithPath:exportFile];
exporter.outputURL = exportURL;
// do the export
[exporter exportAsynchronouslyWithCompletionHandler:^{
int exportStatus = exporter.status;
switch (exportStatus) {
case AVAssetExportSessionStatusFailed:
NSError *exportError = exporter.error;
NSLog (@"AVAssetExportSessionStatusFailed: %@", exportError);
break;
case AVAssetExportSessionStatusCompleted: NSLog (@"AVAssetExportSessionStatusCompleted"); break;
case AVAssetExportSessionStatusUnknown: NSLog (@"AVAssetExportSessionStatusUnknown"); break;
case AVAssetExportSessionStatusExporting: NSLog (@"AVAssetExportSessionStatusExporting"); break;
case AVAssetExportSessionStatusCancelled: NSLog (@"AVAssetExportSessionStatusCancelled"); break;
case AVAssetExportSessionStatusWaiting: NSLog (@"AVAssetExportSessionStatusWaiting"); break;
default: NSLog (@"didn't get export status"); break;
}
}];
// start up the export progress bar
progressView.hidden = NO;
progressView.progress = 0.0;
[NSTimer scheduledTimerWithTimeInterval:0.1
target:self
selector:@selector (updateExportProgress:)
userInfo:exporter
repeats:YES];
}
そのパスrecordingsArray
# pragma mark mergeRecording
- (void) mergeRecording
{
AVMutableComposition *composition = [AVMutableComposition composition];
[self buildSequenceComposition:composition]; //given Below
NSLog (@"compatible presets for songAsset: %@",[AVAssetExportSession exportPresetsCompatibleWithAsset:composition]);
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset: composition presetName: AVAssetExportPresetAppleM4A];
exporter.outputFileType = @"com.apple.m4a-audio";
//File Name
NSString *recordingFileName = [self setRecordingFileName];
self.recordingTimeLbl.text = @"00:00:00";
NSString *exportFile = [NSTemporaryDirectory() stringByAppendingFormat: @"/%@.m4a", recordingFileName];
// set up export
BOOL yes = [[NSFileManager defaultManager] removeItemAtPath:exportFile error:NULL];
NSURL *exportURL = [NSURL fileURLWithPath:exportFile];
exporter.outputURL = exportURL;
NSData *sound1Data = [[NSData alloc] initWithContentsOfURL: exportURL];
NSLog(@"Length %i",sound1Data.length);
[exporter exportAsynchronouslyWithCompletionHandler:^{
int exportStatus = exporter.status;
switch (exportStatus) {
case AVAssetExportSessionStatusFailed:
NSLog (@"AVAssetExportSessionStatusFailed:");
break;
case AVAssetExportSessionStatusCompleted: NSLog (@"AVAssetExportSessionStatusCompleted"); break;
case AVAssetExportSessionStatusUnknown: NSLog (@"AVAssetExportSessionStatusUnknown"); break;
case AVAssetExportSessionStatusExporting: NSLog (@"AVAssetExportSessionStatusExporting"); break;
case AVAssetExportSessionStatusCancelled: NSLog (@"AVAssetExportSessionStatusCancelled"); break;
case AVAssetExportSessionStatusWaiting: NSLog (@"AVAssetExportSessionStatusWaiting"); break;
default: NSLog (@"didn't get export status"); break;
}
}];
// start up the export progress bar
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector (updateProgress:) userInfo:exporter repeats:NO];
}
- (NSString *) setRecordingFileName
{
NSDate *todaysDate = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"dd-MM-yyyy"];
NSString *dateString11 = [dateFormat stringFromDate:todaysDate];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *dateComponents = [gregorian components:(NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit) fromDate:todaysDate];
NSInteger hour = [dateComponents hour];
NSInteger minute = [dateComponents minute];
NSInteger second = [dateComponents second];
[gregorian release];
NSLog(@"Date: %@ \n Time : %@-%@-%@",dateString11,[NSString stringWithFormat:@"%i",hour],[NSString stringWithFormat:@"%i",minute],[NSString stringWithFormat:@"%i",second]);
NSString *recordingFileName = @"Any Name";
if(recordingFileName.length > 0)
{
recordingFileName = [NSString stringWithFormat:@"%@AND%@AND%@-%@-%@", recordingFileName, dateString11, [NSString stringWithFormat:@"%i",hour], [NSString stringWithFormat:@"%i",minute], [NSString stringWithFormat:@"%i",second]];
}
else
{
recordingFileName = [NSString stringWithFormat:@"%@AND%@-%@-%@",dateString11,[NSString stringWithFormat:@"%i",hour],[NSString stringWithFormat:@"%i",minute],[NSString stringWithFormat:@"%i",second]];
}
return recordingFileName;
}
- (void)updateProgress:(id)timer
{
AVAssetExportSession *session;
if([timer isKindOfClass:[NSTimer class]])
session = (AVAssetExportSession *)[timer userInfo];
else if([timer isKindOfClass:[AVAssetExportSession class]])
session = timer;
if (session.status == AVAssetExportSessionStatusExporting)
{
NSArray *modes = [[[NSArray alloc] initWithObjects:NSDefaultRunLoopMode, UITrackingRunLoopMode, nil] autorelease];
[self performSelector:@selector(updateProgress:) withObject:session afterDelay:0.5 inModes:modes];
}
else if(session.status == AVAssetExportSessionStatusCompleted)
{
NSLog(@"Exporting Ended");
NSURL *exportURL = session.outputURL;
NSData *sound1Data = [[NSData alloc] initWithContentsOfURL: exportURL];
NSLog(@"Length %i \n Path %@",sound1Data.length,exportURL);
[self.activityIndicator stopAnimating];
self.activityIndicator.hidden = YES;
NSLog(@"Merging Complete");
for(int x = 0 ; x < [recordingsArray count] ; x++)
{
NSURL *recordingPathUrl = [recordingsArray objectAtIndex:x];
BOOL yes = [[NSFileManager defaultManager] removeItemAtPath:recordingPathUrl.relativePath error:NULL];
if (yes)
{
NSLog(@"File Removed at Path %@",recordingPathUrl.relativePath);
}
else
{
NSLog(@"Problem During Removal of Recording At Path %@",recordingPathUrl.relativePath);
}
}
NSString *exportFile = [NSString stringWithFormat:@"%@",exportURL];
NSString *recordingFileName = [self setRecordingFileName];
BOOL isInserted = [[DbFile sharedDatabase] insertRecordingDataIntoTable:recordingFileName recordingPath:exportFile];
if(isInserted)
{
NSLog(@"Recording Inserted In Database");
}
else
{
NSLog(@"Recording Inserted In Database");
}
if([timer isKindOfClass:[NSTimer class]])
[timer invalidate];
}
else if(session.status == AVAssetExportSessionStatusFailed)
{
[self.activityIndicator stopAnimating];
NSLog(@"Recording Export Failed");
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Recording Export Failed" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alertView show];
[alertView release];
if([timer isKindOfClass:[NSTimer class]])
[timer invalidate];
}
else if(session.status == AVAssetExportSessionStatusCancelled)
{
[self.activityIndicator stopAnimating];
NSLog(@"Recording Export Cancelled");
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Recording Export Cancelled" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alertView show];
[alertView release];
if([timer isKindOfClass:[NSTimer class]])
[timer invalidate];
}
}
- (void) buildSequenceComposition:(AVMutableComposition *)composition
{
AVMutableCompositionTrack *audioTrack1 = [composition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
CMTime nextClipStartTime = kCMTimeZero;
for(NSURL * view in recordingsArray)
{
AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:view options:nil];
CMTimeRange timeRangeInAsset;
timeRangeInAsset = CMTimeRangeMake(kCMTimeZero, [audioAsset duration]);
AVAssetTrack *clipVideoTrack = [[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[audioTrack1 insertTimeRange:timeRangeInAsset ofTrack:clipVideoTrack atTime:nextClipStartTime error:nil];
nextClipStartTime = CMTimeAdd(nextClipStartTime, timeRangeInAsset.duration);
}
}
それとも誰も参考になる2つの.wavファイルを、結合する方法を知っているかのように呼ばれる配列に含まれるオーディオファイルの順番の数.. – Snowman