How can I trim an audio recorded with EZAudioRecorder?

Question

I want to trim an audio which is recorded with EZAudioRecorder .

I am writing this code to trim an audio. This is working fine for audio recorded with AVAudioRecorder but it triggers error block with EZAudioRecorder , with an error couldn't open file .

-(BOOL)trimAudiofile{
   float audioStartTime=1.0;
   float audioEndTime=2.0;//define end time of audio
   NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
   [dateFormatter setDateFormat:@"yyyy-MM-dd_HH-mm-ss"];
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
   NSString *libraryCachesDirectory = [paths objectAtIndex:0];
   libraryCachesDirectory = [libraryCachesDirectory stringByAppendingPathComponent:@"Caches"];
   NSString *OutputFilePath = [libraryCachesDirectory stringByAppendingFormat:@"/output_%@.m4a", [dateFormatter stringFromDate:[NSDate date]]];
   NSURL *audioFileOutput = [NSURL fileURLWithPath:OutputFilePath];
   NSURL *audioFileInput=[self testFilePathURL];//<Path of orignal audio file>

   if (!audioFileInput || !audioFileOutput)
   {
       return NO;
   }

  [[NSFileManager defaultManager] removeItemAtURL:audioFileOutput error:NULL];
  AVAsset *asset = [AVAsset assetWithURL:audioFileInput];

  AVAssetExportSession *exportSession = [AVAssetExportSession exportSessionWithAsset:asset
                                                                    presetName:AVAssetExportPresetAppleM4A];
 if (exportSession == nil)
 {
     return NO;
 }
 CMTime startTime = CMTimeMake((int)(floor(audioStartTime * 100)), 100);
 CMTime stopTime = CMTimeMake((int)(ceil(audioEndTime * 100)), 100);
 CMTimeRange exportTimeRange = CMTimeRangeFromTimeToTime(startTime, stopTime);

 exportSession.outputURL = audioFileOutput;
 exportSession.timeRange = exportTimeRange;
 exportSession.outputFileType = AVFileTypeAppleM4A;

[exportSession exportAsynchronouslyWithCompletionHandler:^
{
   if (AVAssetExportSessionStatusCompleted == exportSession.status)
   {
     NSLog(@"Export OK");
   }
   else if (AVAssetExportSessionStatusFailed == exportSession.status)
   {
     NSLog(@"Export failed: %@", [[exportSession error] localizedDescription]);
   }
 }];
 return YES;
}

Note :- The audio file exists in document directory and EZAudioPlayer is also able to play this file.

Can anyone tell me where am I doing wrong ? Any help on this will be appreciated.

Thanks in advance.

Answer 1

1.Check file formate in both cases when you trim audio recorded by AVAudioRecorder and audio by EZAudioRecorder .

2.You are trying to export file before record audio successfully,you have to wait until audio is not recorded.

Answer 2

Thanks all.. I found the solution of this issue...!!

I was not closing audio file. I added this code before trimming audio, Now everything working as expecting.

We need to close this file even file exits in document directory.

if (self.recorder)
{
    [self.recorder closeAudioFile];
}

have a look on this git issue