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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "id": "bccAucKjnPHm"
+   },
+   "source": [
+    "### Dependencies and inputs"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "id": "cSih95WFmwgi"
+   },
+   "outputs": [],
+   "source": [
+    "!pip -q install pydub\n",
+    "from google.colab import output\n",
+    "from base64 import b64decode, b64encode\n",
+    "from io import BytesIO\n",
+    "import numpy as np\n",
+    "from pydub import AudioSegment\n",
+    "from IPython.display import HTML, display\n",
+    "import torch\n",
+    "import matplotlib.pyplot as plt\n",
+    "import moviepy.editor as mpe\n",
+    "from matplotlib.animation import FuncAnimation, FFMpegWriter\n",
+    "import matplotlib\n",
+    "matplotlib.use('Agg')\n",
+    "\n",
+    "torch.set_num_threads(1)\n",
+    "\n",
+    "model, _ = torch.hub.load(repo_or_dir='snakers4/silero-vad',\n",
+    "                              model='silero_vad',\n",
+    "                              force_reload=True)\n",
+    "\n",
+    "def int2float(sound):\n",
+    "    abs_max = np.abs(sound).max()\n",
+    "    sound = sound.astype('float32')\n",
+    "    if abs_max > 0:\n",
+    "        sound *= 1/abs_max\n",
+    "    sound = sound.squeeze()\n",
+    "    return sound\n",
+    "\n",
+    "AUDIO_HTML = \"\"\"\n",
+    "<script>\n",
+    "var my_div = document.createElement(\"DIV\");\n",
+    "var my_p = document.createElement(\"P\");\n",
+    "var my_btn = document.createElement(\"BUTTON\");\n",
+    "var t = document.createTextNode(\"Press to start recording\");\n",
+    "\n",
+    "my_btn.appendChild(t);\n",
+    "//my_p.appendChild(my_btn);\n",
+    "my_div.appendChild(my_btn);\n",
+    "document.body.appendChild(my_div);\n",
+    "\n",
+    "var base64data = 0;\n",
+    "var reader;\n",
+    "var recorder, gumStream;\n",
+    "var recordButton = my_btn;\n",
+    "\n",
+    "var handleSuccess = function(stream) {\n",
+    "  gumStream = stream;\n",
+    "  var options = {\n",
+    "    //bitsPerSecond: 8000, //chrome seems to ignore, always 48k\n",
+    "    mimeType : 'audio/webm;codecs=opus'\n",
+    "    //mimeType : 'audio/webm;codecs=pcm'\n",
+    "  };            \n",
+    "  //recorder = new MediaRecorder(stream, options);\n",
+    "  recorder = new MediaRecorder(stream);\n",
+    "  recorder.ondataavailable = function(e) {            \n",
+    "    var url = URL.createObjectURL(e.data);\n",
+    "    // var preview = document.createElement('audio');\n",
+    "    // preview.controls = true;\n",
+    "    // preview.src = url;\n",
+    "    // document.body.appendChild(preview);\n",
+    "\n",
+    "    reader = new FileReader();\n",
+    "    reader.readAsDataURL(e.data); \n",
+    "    reader.onloadend = function() {\n",
+    "      base64data = reader.result;\n",
+    "      //console.log(\"Inside FileReader:\" + base64data);\n",
+    "    }\n",
+    "  };\n",
+    "  recorder.start();\n",
+    "  };\n",
+    "\n",
+    "recordButton.innerText = \"Recording... press to stop\";\n",
+    "\n",
+    "navigator.mediaDevices.getUserMedia({audio: true}).then(handleSuccess);\n",
+    "\n",
+    "\n",
+    "function toggleRecording() {\n",
+    "  if (recorder && recorder.state == \"recording\") {\n",
+    "      recorder.stop();\n",
+    "      gumStream.getAudioTracks()[0].stop();\n",
+    "      recordButton.innerText = \"Saving recording...\"\n",
+    "  }\n",
+    "}\n",
+    "\n",
+    "// https://stackoverflow.com/a/951057\n",
+    "function sleep(ms) {\n",
+    "  return new Promise(resolve => setTimeout(resolve, ms));\n",
+    "}\n",
+    "\n",
+    "var data = new Promise(resolve=>{\n",
+    "//recordButton.addEventListener(\"click\", toggleRecording);\n",
+    "recordButton.onclick = ()=>{\n",
+    "toggleRecording()\n",
+    "\n",
+    "sleep(2000).then(() => {\n",
+    "  // wait 2000ms for the data to be available...\n",
+    "  // ideally this should use something like await...\n",
+    "  //console.log(\"Inside data:\" + base64data)\n",
+    "  resolve(base64data.toString())\n",
+    "\n",
+    "});\n",
+    "\n",
+    "}\n",
+    "});\n",
+    "      \n",
+    "</script>\n",
+    "\"\"\"\n",
+    "\n",
+    "def record(sec=10):\n",
+    "    display(HTML(AUDIO_HTML))\n",
+    "    s = output.eval_js(\"data\")\n",
+    "    b = b64decode(s.split(',')[1])\n",
+    "    audio = AudioSegment.from_file(BytesIO(b))\n",
+    "    audio.export('test.mp3', format='mp3')\n",
+    "    audio = audio.set_channels(1)\n",
+    "    audio = audio.set_frame_rate(16000)\n",
+    "    audio_float = int2float(np.array(audio.get_array_of_samples()))\n",
+    "    audio_tens = torch.tensor(audio_float )\n",
+    "    return audio_tens\n",
+    "\n",
+    "def make_animation(probs, audio_duration, interval=40):\n",
+    "    fig = plt.figure(figsize=(16, 9))\n",
+    "    ax = plt.axes(xlim=(0, audio_duration), ylim=(0, 1.02))\n",
+    "    line, = ax.plot([], [], lw=2)\n",
+    "    x = [i / 16000 * 1536 for i in range(len(probs))]\n",
+    "    plt.xlabel('Time, seconds', fontsize=16)\n",
+    "    plt.ylabel('Speech Probability', fontsize=16)\n",
+    "\n",
+    "    def init():\n",
+    "        plt.fill_between(x, probs, color='#064273')\n",
+    "        line.set_data([], [])\n",
+    "        line.set_color('#990000')\n",
+    "        return line,\n",
+    "\n",
+    "    def animate(i):\n",
+    "        x = i * interval / 1000 - 0.1\n",
+    "        y = np.linspace(0, 1.02, 2)\n",
+    "        \n",
+    "        line.set_data(x, y)\n",
+    "        line.set_color('#990000')\n",
+    "        return line,\n",
+    "\n",
+    "    anim = FuncAnimation(fig, animate, init_func=init, interval=interval, save_count=audio_duration / (interval / 1000))\n",
+    "\n",
+    "    f = r\"animation.mp4\" \n",
+    "    writervideo = FFMpegWriter(fps=1000/interval) \n",
+    "    anim.save(f, writer=writervideo)\n",
+    "    plt.close('all')\n",
+    "\n",
+    "def combine_audio(vidname, audname, outname, fps=25): \n",
+    "    my_clip = mpe.VideoFileClip(vidname, verbose=False)\n",
+    "    audio_background = mpe.AudioFileClip(audname)\n",
+    "    final_clip = my_clip.set_audio(audio_background)\n",
+    "    final_clip.write_videofile(outname,fps=fps,verbose=False)\n",
+    "\n",
+    "def record_make_animation():\n",
+    "  tensor = record()\n",
+    "\n",
+    "  print('Calculating probabilities...')\n",
+    "  speech_probs = []\n",
+    "  window_size_samples = 1536\n",
+    "  for i in range(0, len(tensor), window_size_samples):\n",
+    "      if len(tensor[i: i+ window_size_samples]) < window_size_samples:\n",
+    "        break\n",
+    "      speech_prob = model(tensor[i: i+ window_size_samples], 16000).item()\n",
+    "      speech_probs.append(speech_prob)\n",
+    "  model.reset_states()\n",
+    "  print('Making animation...')\n",
+    "  make_animation(speech_probs, len(tensor) / 16000)\n",
+    "\n",
+    "  print('Merging your voice with animation...')\n",
+    "  combine_audio('animation.mp4', 'test.mp3', 'merged.mp4')\n",
+    "  print('Done!')\n",
+    "  mp4 = open('merged.mp4','rb').read()\n",
+    "  data_url = \"data:video/mp4;base64,\" + b64encode(mp4).decode()\n",
+    "  display(HTML(\"\"\"\n",
+    "  <video width=800 controls>\n",
+    "        <source src=\"%s\" type=\"video/mp4\">\n",
+    "  </video>\n",
+    "  \"\"\" % data_url))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "id": "IFVs3GvTnpB1"
+   },
+   "source": [
+    "## Record example"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "id": "5EBjrTwiqAaQ"
+   },
+   "outputs": [],
+   "source": [
+    "record_make_animation()"
+   ]
+  }
+ ],
+ "metadata": {
+  "colab": {
+   "collapsed_sections": [
+    "bccAucKjnPHm"
+   ],
+   "name": "Untitled2.ipynb",
+   "provenance": []
+  },
+  "kernelspec": {
+   "display_name": "Python 3",
+   "name": "python3"
+  },
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}