Leo Schubert created CB-12542:
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Summary: can’t record to a “wav” file on IOS media plugin
Key: CB-12542
URL: https://issues.apache.org/jira/browse/CB-12542
Project: Apache Cordova
Issue Type: Bug
Components: Plugin Media
Affects Versions: 3.5.0
Environment: 9.x Simulator , IOS 8.x device (iPod touch)
Reporter: Leo Schubert
I get “Failed to initialize AVAudioRecorder: (null)” in the error callback of
the startRecordingAudio() exec API.
I see that the AVAudioPlayer settings in CDVAudio.m are
NSDictionary *audioSettings = @{AVFormatIDKey: @(kAudioFormatMPEG4AAC),
AVSampleRateKey: @(44100),
AVNumberOfChannelsKey: @(1),
AVEncoderAudioQualityKey:
@(AVAudioQualityMedium)
};
This is IMHO the reason it doesn’t work. Either one uses the .m4a extension
with kAudioFormatMPEG4AAC or
.wav with the kAudioFormatLinearPCM key (the IOS docs are very unclear about
which file extensions are actually supported)
The plugin enforces “wav” but the settings enforce the MPEG4AAC encoder.
Using the attached simple patch and using .m4a at the JS side solves the
problem and records on my iPod touch IOS 8.x.
I stumbled also across
https://github.com/remoorejr/cordova-plugin-media-with-compression
where the exchange wav->m4a is done too.
Strangely I can’t find much problems reported on stackoverflow, but this one
seems to cover it
http://stackoverflow.com/questions/12244111/failed-to-initialize-avaudiorecorder-null
The last poster seem to indicate that the problem sneaked in in IOS 8
(previously it was probably possible to record to a .wav file but with AAC
content).
Looking at the recordAudio() test for the plugin in tests/tests.js I can’t see
that potential errors are actually causing the test to fail: they are just
logged with console.log , so this may explain why the problem has not been
detected by the tests.
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