Add ffmpeg-numpy.ipynb example

examples/ffmpeg-numpy.ipynb

@@ -0,0 +1,103 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 116,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from ipywidgets import interact\n",
+    "from matplotlib import pyplot as plt\n",
+    "import ffmpeg\n",
+    "import ipywidgets as widgets\n",
+    "import numpy as np"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 117,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "probe = ffmpeg.probe('in.mp4')\n",
+    "video_info = next(stream for stream in probe['streams'] if stream['codec_type'] == 'video')\n",
+    "width = int(video_info['width'])\n",
+    "height = int(video_info['height'])\n",
+    "num_frames = int(video_info['nb_frames'])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 118,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "out, err = (\n",
+    "    ffmpeg\n",
+    "    .input('in.mp4')\n",
+    "    .output('pipe:', format='rawvideo', pix_fmt='rgb24')\n",
+    "    .run(capture_stdout=True)\n",
+    ")\n",
+    "video = (\n",
+    "    np\n",
+    "    .frombuffer(out, np.uint8)\n",
+    "    .reshape([-1, height, width, 3])\n",
+    ")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 115,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "17d13d7551114fb39a1fad933cf0398a",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "interactive(children=(IntSlider(value=0, description='frame', max=209), Output()), _dom_classes=('widget-inter…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "@interact(frame=(0, num_frames))\n",
+    "def show_frame(frame=0):\n",
+    "    plt.imshow(video[frame,:,:,:])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.4"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}