[HELP] AudioCodecInitialize failed on iOS

[Mateis]

In my app, when hitting the Record button on iOS I get the error in console: ' AudioCodecInitialize failed '.

I'm using flutter_sound 6.1.2 codec I'm using is Codec.aacADTS

It does work on Android.

Any idea where I should start seeking a solution?

[Larpoux]

Perhaps you can try to specify a "compiled with version 10.0" inside your Podfile.

You can try also to use Flutter Sound 7.5.1, to see if better... If you want help you must post your logs.

[Mateis]

Thank you. Upgrading to 7.5.1 didn't solve.

These are the logs I see in Xcode (maybe I can find more detailed logs somehow):

2021-01-18 09:19:04.864801+0100 Runner[38044:1167257] flutter: recorder
2021-01-18 09:19:04.869950+0100 Runner[38044:1167257] flutter: ----------------------------
2021-01-18 09:19:04.900248+0100 Runner[38044:1165917] IOS:--> setAudioFocus
2021-01-18 09:19:04.900654+0100 Runner[38044:1165917] IOS:--> initializeFlautoPlayer
2021-01-18 09:19:04.901031+0100 Runner[38044:1165917] IOS:<-- setAudioFocus
2021-01-18 09:19:09.178168+0100 Runner[38044:1167257] flutter: Tap down
2021-01-18 09:19:09.187082+0100 Runner[38044:1167257] flutter: Tap up?
2021-01-18 09:19:12.350076+0100 Runner[38044:1165917]  AudioCodecInitialize failed
2021-01-18 09:19:12.361405+0100 Runner[38044:1167257] flutter: startRecorder
2021-01-18 09:19:15.369086+0100 Runner[38044:1169538] [ServicesDaemonManager] interruptionHandler is called. -[FontServicesDaemonManager connection]_block_invoke
2021-01-18 09:19:19.617847+0100 Runner[38044:1167257] flutter: Tap down
2021-01-18 09:19:19.622080+0100 Runner[38044:1165917]  AudioCodecInitialize failed
2021-01-18 09:19:19.625306+0100 Runner[38044:1167257] flutter: stopRecorder
2021-01-18 09:19:19.626730+0100 Runner[38044:1167257] flutter: ----------------------------
2021-01-18 09:19:19.627058+0100 Runner[38044:1167257] flutter: postwave
2021-01-18 09:19:19.627534+0100 Runner[38044:1167257] flutter: ----------------------------

[Mateis]

Perhaps you can try to specify a "compiled with version 10.0" inside your Podfile.

You can try also to use Flutter Sound 7.5.1, to see if better... If you want help you must post your logs.

I am using version 10 (in podfile). Also did not fix

[Larpoux]

The message AudioCodecInitialize failed does not seem to be printed by Flutter Sound. Is it you who print this ? And Why ?

[Mateis]

The message AudioCodecInitialize failed does not seem to be printed by Flutter Sound. Is it you who print this ? And Why ?

No i'm not printing it (as in i didn't define it in the code somewhere to do it). It happens automatically

I'll try run the example app - to check if it gives the same problem.

[Larpoux]

warning: the following paths have collided (e.g. case-sensitive paths
on a case-insensitive filesystem) and only one from the same
colliding group is in the working tree:

 'doc/pages/flutter-sound/api/wave_header/WaveHeader/writeInt.html'
 'doc/pages/flutter-sound/api/wave_header/WaveHeader/writeint.html'

Those two files are generated by dartdoc, It means that someone ( me 👎 ! ) created two functions with almost the same name (probably doing the same thing). Not clean 👎

[Larpoux]

I am sorry, but actually I am overloaded with too many (unpleasant) tasks. I do not help you as much as I would like. I really need to setup good tools to manage such an important project. And of course, several other developers are terribly missing.

[Larpoux]

I am in the process of transferring everything out of Github. Github is not Open Source, and τ must not use not Open Source Software.

[Mateis]

Alright! I really appreciate your time and help. I'll continue debug myself, so you can focus on other tasks!

I tested recording with the example app on iOS. That works. So it must be my code that has something wrong

[Mateis]

I found the issue. It relates to this issue: https://github.com/Canardoux/tau/issues/91

The issue happens when a sampleRate is defined. My code:

      await soundRecorder.startRecorder(
        //audioSource : AudioSource.defaultSource,
        toFile      : path,
        codec       : _codec,
        bitRate     : 24000,
        sampleRate  : 44100,
      );

When I leave out the sample rate parameter, recording works.

Now, I do want higher quality recording (and not the default 16000). Any tips how to achieve that?

[Larpoux]

I am very glad that you located the reason of your issue. 👍 I am going to look that.

Note: I thought that "sampleRate" was only for PCM. And "bitRate" was for streaming codecs. But I can be wrong.

Things must be cleaned in this area.

[github-actions[bot]]

This issue is stale because it has been open 90 days with no activity. Leave a comment or this will be closed in 7 days.