Windows Media Player doesn't reproduce audio from file that was created with mp4box library

[AlexMixilab]

I am using the mp4box library to create a media file that includes video and audio tracks. I have set up my audio encoder output callback using the following code:
`if (encodingAudioTrack === null) {
let encodingAudioTrackOptions = {
timescale: this.timescale,
samplerate: this.options.audioConfig?.sampleRate,
channel_count: this.options.audioConfig?.numberOfChannels,
samplesize: 16,
hdlr: 'soun',
name: 'SoundHandler',
type: 'mp4a',
brands: ['mp42', 'mp41', 'isom'],
}
encodingAudioTrack = this.file.addTrack(encodingAudioTrackOptions);
}

if (this.previousEncodedAudioChunk) {
let ab = new ArrayBuffer(this.previousEncodedAudioChunk.byteLength);
this.previousEncodedAudioChunk.copyTo(ab);
const sampleDuration = chunk.timestamp - this.previousEncodedAudioChunk.timestamp;
this.file.addSample(encodingAudioTrack, ab, {
dts: this.audioSampleTimestamp,
cts: this.audioSampleTimestamp,
duration: sampleDuration,
});
this.audioChunkCount++;
this.audioSampleTimestamp = this.audioSampleTimestamp + (sampleDuration ?? 0);
}`

This is the config for AudioEncoder from WebCodec API:
audioEncoderConfig = { codec: 'mp4a.40.2', sampleRate: combinedStream.getAudioTracks()[0].getSettings().sampleRate ?? 0, numberOfChannels: combinedStream.getAudioTracks()[0].getSettings().channelCount ?? 0, bitrate: 128_000, }

However, when I save the created file and launch it with Windows 10 Media Player or Movies & TV, the audio doesn't play. MPC_HC Player, on the other hand, opens the file correctly. I noticed that when I check the info with MediaInfo tool, the codec identifier is mp4a instead of mp4a.40.2 that was set.

Am I missing some details or did I set something wrong? I appreciate any help.

[hughfenghen]

@AlexMixilab FYI #341