Songs not playing consistently from Device local document url to AVAudioPlayer

Question

I am developing music application, in which I have need of storing converted song to "Document directory" for later usage. For some reason its not playing from stored directory url but I am not getting any error as well. I checked inside the directory and found the same stored song present inside it.

The same song url played successfully from Directory before.

My code to store song after conversion from mp3 to m4a.

{
NSURL *assetURL = [NSURL URLWithString:_assertURL];
    AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil];

    /* approach 1: export just the song itself
     */
    AVAssetExportSession *exporter = [[AVAssetExportSession alloc]
                                      initWithAsset: songAsset
                                      presetName: AVAssetExportPresetAppleM4A];
    NSLog (@"created exporter. supportedFileTypes: %@", exporter.supportedFileTypes);
    exporter.outputFileType = @"com.apple.m4a-audio";
    NSString *exportFile = [myDocumentsM4aDirectory() stringByAppendingPathComponent: [NSString stringWithFormat:@"%@.m4a",_title]];
    // end of approach 1

    // set up export (hang on to exportURL so convert to PCM can find it)
    [self myDeleteFile:exportFile];
    //[exportURL release];
    _exportURL = [NSURL fileURLWithPath:exportFile];
    exporter.outputURL = _exportURL;

    // do the export
    [exporter exportAsynchronouslyWithCompletionHandler:^{
        int exportStatus = exporter.status;
        switch (exportStatus) {
            case AVAssetExportSessionStatusFailed: {
                // log error to view
                NSError *exportError = exporter.error;
                NSLog (@"AVAssetExportSessionStatusFailed: %@", exportError);

                break;
            }
            case AVAssetExportSessionStatusCompleted: {
                NSLog (@"AVAssetExportSessionStatusCompleted");

 //Final document url

                NSURL *audioUrl = _exportURL;
                NSLog(@"Audio Url=%@",audioUrl);


                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;
            }
        }
    }];

}

Deleting the existing file which available inside the current path:

- (void)myDeleteFile:(NSString*)path{

    if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
        NSError *deleteErr = nil;
        [[NSFileManager defaultManager] removeItemAtPath:path error:&deleteErr];
        if (deleteErr) {
            NSLog (@"Can't delete %@: %@", path, deleteErr);
        }
    }

}

This is code used to create m4a directory:

NSString* myDocumentsM4aDirectory(){

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSError *error = nil;
    NSString *dataPath = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"/m4aFolder"];

    if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
        [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error];
    //Create folde
    return dataPath;


}

How to figure out this issue to play locally stored song permanently?

EDIT:

//This below function to call to play song

- (void)playSong
{
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL fileURLWithPath:_exportURL] options:nil];
NSError *error = nil;
AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:asset.URL error:&error];
if(error == nil)
{
[player play]
}else
{
NSLog (@"Error during playing: %@", error);
}

}

Thanks,

Answer: I found the solution for songs not playing from document, reason I am previously storing the entire assert URL to core data. As ID of document "xxxxxx-xxxxxxx-xxxxxxx-xxxxxxxxx" will keep on changing for each launch.

So, I am fetching the assert path based on the title and extension which I was appended to the URL before. Now its working fine.

This answered helped to resolve this issue: Play local audio file with AVAudioPlayer

Can you provide the code where you're playing from document dictionary — Devang Goswami, Mar 27 '17 at 06:54
Please find the edited code snippet for playing exported song. — Abilash Balasubramanian, Mar 27 '17 at 07:08

score 0 · Answer 1 · answered Mar 27 '17 at 08:07

You can play song directly from document directory 

url = [NSURL fileURLWithPath:strFilePath];

        NSError *error;
        if(mp3player)
        {
            mp3player = nil;
        }
        mp3player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
        mp3player.delegate = self;
        [mp3player setVolume:1.0];
        mp3player.numberOfLoops = 0;
        [mp3player prepareToPlay];
        [mp3player play];

Note:

Define "mp3player" in .h file.

Still I am getting error: NSOSStatusErrorDomain Code=2003334207 "(null)" after changing as per your code — Abilash Balasubramanian, Apr 08 '17 at 10:01

Songs not playing consistently from Device local document url to AVAudioPlayer

1 Answers1