Recorded audio file from Android can't play in iOS. Android to Android, iOS to iOS & iOS to Android is fine.

[jackwill99]

Here is the output recorded audio file from Android.

[ujas-m-simformsolutions]

Hey @jackwill99, The link you provided requires access can you please make it open, and what configuration did you set for recording an audio file? Because with default settings I'm able to record on android and play it on IOS.

[SlavisDEV]

I have the same problem. Any updates?

[dev-interviewbox]

I'm having the same problem. Is there any solution?

[jackwill99]

I solved temporary by using ffmpeg package in backend(Laravel). It can solve your problem, but I want to get this feature from Flutter. Thanks guy.

[jaehyeokl]

I solved temporary by using ffmpeg package in backend(Laravel). It can solve your problem, but I want to get this feature from Flutter. Thanks guy.

@jackwill99
May I know how to use ffmpeg command?

[jackwill99]

@jae-om
audio means your current audio
modify_audio means converted audio from ffmpeg

In this case, we used 192 in audio resolution.

ffmpeg -i  audio  -c:a aac -b:a 192k  modify_audio

And @ujas-m-simformsolutions , I provided required access in my file and my config is here

void _initialiseControllers() {
    recorderController = RecorderController()
      ..androidEncoder = AndroidEncoder.aac
      ..androidOutputFormat = AndroidOutputFormat.aac_adts
      ..iosEncoder = IosEncoder.kAudioFormatMPEG4AAC
      ..sampleRate = Platform.isAndroid ? 16000 : 44100
      ..bitRate = Platform.isAndroid ? 64000 : 48000;
  }

This code is final and I test by changing androidOutputFormat, sampleRate and bitRate. But, result is the same.

We also notice when audio is recorded from Android, there is no information of Duration,AudioChannels, SampleRate. But when we recorded from iOS, there has. So, ffmpeg changes the Standard Audio File.

[ujas-m-simformsolutions]

@jackwill99 Can you check this in 1.0.1 if this issue still persists with default setting and also I would suggest removing the bitrate parameter.

[jackwill99]

@ujas-m-simformsolutions Hello, I'm testing with your example nothing changes and the bitrate parameter is already removed in the config as the below -

void _initialiseControllers() {
    recorderController = RecorderController()
      ..androidEncoder = AndroidEncoder.aac
      ..androidOutputFormat = AndroidOutputFormat.mpeg4
      ..iosEncoder = IosEncoder.kAudioFormatMPEG4AAC
      ..sampleRate = 44100;
  }

Logs from Xcode,

MP3AudioFile.cpp:1,526  Problem scanning for packets
MP3AudioFile.cpp:1,065  MPEGAudioFile::OpenFromDataSource failed
AudioFileObject.cpp:105  OpenFromDataSource failed
AudioFileObject.cpp:80  Open failed
MP3AudioFile.cpp:1,526  Problem scanning for packets
MP3AudioFile.cpp:1,065  MPEGAudioFile::OpenFromDataSource failed
AudioFileObject.cpp:105  OpenFromDataSource failed
AudioFileObject.cpp:80  Open failed
ExtAudioFile.cpp:211 about to throw 'dta?': open audio file
AVAEInternal.h:109 [AVAudioFile.mm:135:AVAudioFileImpl: (ExtAudioFileOpenURL((CFURLRef)fileURL, &_extAudioFile)): error 1,685,348,671
[VERBOSE-2:dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(AudioWaveforms, Failed to prepare player, null, null)
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:652:7)
#1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:310:18)
<asynchronous suspension>
#2      AudioWaveformsInterface.preparePlayer (package:audio_waveforms/src/base/audio_waveforms_interface.dart:100:18)
<asynchronous suspension>
#3      PlayerController.preparePlayer (package:audio_waveforms/src/controllers/player_controller.dart:122:24)
<asynchronous suspension>
[VERBOSE-2:dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(AudioWaveforms, Failed to decode audio file, null, null)
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:652:7)
#1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:310:18)
<asynchronous suspension>
#2      AudioWaveformsInterface.extractWaveformData (package:audio_waveforms/src/base/audio_waveforms_interface.dart:163:9)
<asynchronous suspension>
#3      PlayerController.extractWaveformData (package:audio_waveforms/src/controllers/player_controller.dart:169:20)
<asynchronous suspension>

As I mentioned above , we also notice when audio is recorded from Android, there is no information of Duration,AudioChannels, SampleRate. But when we recorded from iOS, there has. audio4.mp3 is the audio file of example/assets/audios/ folder and another is recorded audio file from android.

Here is the output of audio file from android and let me know if I was wrong.

Thanks.

[jackwill99]

And my flutter doctor -v -

[✓] Flutter (Channel stable, 3.13.0, on macOS 14.0 23A344 darwin-arm64, locale
    en-US)
    • Flutter version 3.13.0 on channel stable at
      /Users/tensor_lab/Documents/developer/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision efbf63d9c6 (7 weeks ago), 2023-08-15 21:05:06 -0500
    • Engine revision 1ac611c64e
    • Dart version 3.1.0
    • DevTools version 2.25.0

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/tensor_lab/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME =
      /Users/tensor_lab/.gem/bin:/Users/tensor_lab/.rbenv/shims:/Users/tensor_la
      b/.rbenv/bin:/Users/tensor_lab/Downloads/apache-maven-3.9.2/bin:/opt/homeb
      rew/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Crypte
      xes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.
      cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.
      cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.crypte
      xd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/us
      r/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Ve
      rsions/Current/Commands:/Users/tensor_lab/Library/Application
      Support/JetBrains/Toolbox/scripts:/Users/tensor_lab/Documents/developer/fl
      utter/bin:/Users/tensor_lab/.pub-cache/bin:/Users/tensor_lab/Library/Andro
      id/sdk
    • Java binary at: /Applications/Android
      Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build
      17.0.6+0-17.0.6b829.9-10027231)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15A240d
    • CocoaPods version 1.12.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.3)
    • Android Studio at /Applications/Android Studio.app/Contents
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      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build
      17.0.6+0-17.0.6b829.9-10027231)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.2)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • Flutter plugin version 75.1.4
    • Dart plugin version 232.9559.10

[✓] VS Code (version 1.82.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.74.0

[✓] Connected device (5 available)
    • CPH2363 (mobile)           • dd688732                             •
      android-arm64  • Android 13 (API 33)
    • Jack Will (mobile)         • 00008030-0001086C0279802E            • ios
      • iOS 17.0.2 21A351
    • iPhone 15 Pro Max (mobile) • EB3CEC64-DF04-4D3E-860B-914868DB92FE • ios
      • com.apple.CoreSimulator.SimRuntime.iOS-17-0 (simulator)
    • macOS (desktop)            • macos                                •
      darwin-arm64   • macOS 14.0 23A344 darwin-arm64
    • Chrome (web)               • chrome                               •
      web-javascript • Google Chrome 116.0.5845.187

[✓] Network resources
    • All expected network resources are available.

• No issues found!

iOS Physical device model is iPhone11.