【已解决】js中保存MediaRecorder录音的blob数据到文件中并下载

折腾：

【已解决】web端html+js中如何调用麦克风获取用户语音输入说话

期间，已经可以获取MediaRecorder的录音数据，并可以用audio去播放。

现在需要把MediaRecorder录音得到的，说是blob数据，保存下载，并可以下载

MediaRecorder save file

js MediaRecorder save file

Record Audio and Video with MediaRecorder  |  Web  |  Google Developers

Record to an Audio File using HTML5 and JS

【总结】

然后用代码：

<code>      mediaRecorder.addEventListener('stop', function() {
          console.log("mediaRecorder stoped");
          
          console.log("recordedBlobChunks=%o", recordedBlobChunks);

          const recordedBlob = new Blob(recordedBlobChunks);
          console.log("recordedBlob=%o", recordedBlob);
          const blobUrl = URL.createObjectURL(recordedBlob);
          console.log("blobUrl=%o", blobUrl);

          playRecordedAudio(blobUrl);

          downloadRecordedAudio(blobUrl);
      });

  function downloadRecordedAudio(blobUrl){
      console.log("downloadRecordedAudio: blobUrl=%s", blobUrl);

      $("#downloadSpeakAudio").attr("href", blobUrl);

      var curDate = new Date();
      console.log("curDate=%o", curDate);
      var curDatetimeStr = curDate.Format("yyyyMMdd_HHmmss");
      console.log("curDatetimeStr=%o", curDatetimeStr);
      var recordedAudioFilename = curDatetimeStr + ".webm";
      console.log("recordedAudioFilename=%o", recordedAudioFilename);
      $("#downloadSpeakAudio").attr("download", recordedAudioFilename);
  }

</code>

即可点击并下载：

保存文件为对应的格式，且可以点击播放：

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