Home/ Questions/Q 6357381
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-24T23:09:14+00:00

The code below is throwing an OSStatus error 1718449215 which, according to the Audio

  • 0

The code below is throwing an OSStatus error 1718449215 which, according to the Audio Queue Reference, represents “The playback data format is unsupported.”

The code works correctly if I change the AVFormatKey to be kAudioFormatiLBC or kAudioFormatLinearPCM. Is recording using kAudioFormatMPEG4AAC_HE supported on iOS? 

NSDictionary *settings = 
   [NSDictionary dictionaryWithObjectsAndKeys:
   [NSNumber numberWithFloat: 32000.0],                AVSampleRateKey,
   [NSNumber numberWithInt: kAudioFormatMPEG4AAC_HE],  AVFormatIDKey,
   [NSNumber numberWithInt: 1],                        AVNumberOfChannelsKey,
   [NSNumber numberWithInt: AVAudioQualityMedium],     AVEncoderAudioQualityKey,
nil];

NSError *error = nil;
AVAudioRecorder *avRecorder = [[AVAudioRecorder alloc] 
                                initWithURL:url 
                                settings:settings 
                                error:&error];

NSAssert(error.code != 1718449215,  @"The playback data format is unsupported.");
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The Apple docs, specifically the Multimedia Programming Guide ( http://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/MultimediaPG/UsingAudio/UsingAudio.html ), only lists the HE-AAC as a playback format. Regular AAC is listed for both playback and recording. So, it looks like HE-AAC only has partial support.

    • 0