record-video extension and html-video-response misparse the base64 string when include_audio is true in init_camera.

[kschuler]

The record-video extension (and html-video-response) should record audio and video when init-camera has the parameter include_audio: true.

But when include_audio is true, the base64data is no longer accessible due to a misparse of the string. You get something like the string "audiocodecyouspecified;base64" instead of the base64Data. I suspect the additional metadata relating to the audio codec is messing up this part of the plugin:

private updateData() {
    const data = new Blob(this.recordedChunks, {
      type: this.recorder.mimeType,
    });
    const reader = new FileReader();
    reader.addEventListener("load", () => {
      const base64 = (reader.result as string).split(",")[1];
      this.currentTrialData.record_video_data = base64;
      if (this.onUpdateCallback) {
        this.onUpdateCallback();
      }
    });
    reader.readAsDataURL(data);
  }
}

Maybe something as simple as changing .split(",")[1] with .split("base64,")[1] (or similar) would fix the misparse issue?