[英]How to record microphone audio in JavaScript and submit to DialogFlow?
如何在 JavaScript 中录制来自麦克风的音频并将其提交给 DialogFlow,而无需通过服务器?
There are two parts to this question:这个问题有两个部分:
For recording microphone audio in a format DialogFlow will understand, I use opus-recorder , then convert the blob it returns using the code below:为了以 DialogFlow 能够理解的格式录制麦克风音频,我使用opus-recorder ,然后使用以下代码转换它返回的 blob:
function BlobToDataURL(blob: Blob) {
return new Promise((resolve, reject)=>{
const reader = new FileReader();
reader.addEventListener("loadend", e=>resolve(reader.result as string));
reader.readAsDataURL(blob);
}) as Promise<string>;
}
const micRecorder = new Recorder({
encoderSampleRate: 16000,
originalSampleRateOverride: 16000, // necessary due to Google bug? (https://github.com/chris-rudmin/opus-recorder/issues/191#issuecomment-509426093)
encoderPath: PATH_TO_ENCODER_WORKER_JS,
});
micRecorder.ondataavailable = async typedArray=>{
const audioData = new Blob([typedArray], {type: "audio/ogg"});
const audioData_dataURL = await BlobToDataURL(audioData);
const audioData_str = audioData_dataURL.replace(/^data:.+?base64,/, "");
// here is where you need part 2, to actually submit the audio to DialogFlow
};
micRecorder.start();
To submit the audio-data to DialogFlow, see my answer here: https://stackoverflow.com/a/57857698/2441655要将音频数据提交给 DialogFlow,请在此处查看我的回答: https ://stackoverflow.com/a/57857698/2441655
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