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  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "d18900df-77a4-424c-afa6-ae34ca31d055",
   "metadata": {},
   "outputs": [],
   "source": [
    "import json\n",
    "import ast\n",
    "\n",
    "import numpy as np"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "628b2bc9-819c-4d19-a204-0060dae9fc34",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Replace 'your_file_path.json' with the path to your actual JSON file\n",
    "transform_filename = 'transforms.json'\n",
    "tmp_filename = 'custom_camera_path.json'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "2aff65d5-34bf-4f1c-abad-9343d1c53d4f",
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "\n",
    "with open(tmp_filename, 'r') as file1:\n",
    "    data1 = json.load(file1)\n",
    "\n",
    "with open(transform_filename, 'r') as file2:\n",
    "    data2 = json.load(file2)\n",
    "\n",
    "\n",
    "updated_keyframes = []\n",
    "updated_camera_paths = []\n",
    "\n",
    "sorted_frames = sorted(data2[\"frames\"], key=lambda x: x[\"colmap_im_id\"])\n",
    "\n",
    "sorted_frames = sorted_frames[:120]\n",
    "\n",
    "# keyframe\n",
    "for frame in sorted_frames:\n",
    "    new_keyframe = {}\n",
    "    new_keyframe[\"matrix\"] = list(np.array(frame['transform_matrix']).reshape(-1))\n",
    "    new_keyframe[\"fov\"] = 75\n",
    "    new_keyframe[\"aspect\"] = 1.7777777777777777\n",
    "    new_keyframe[\"override_transition_enabled\"] = False\n",
    "    new_keyframe[\"override_transition_sec\"] = None\n",
    "\n",
    "    updated_keyframes.append(new_keyframe)\n",
    "\n",
    "    new_path = {}\n",
    "    new_path[\"camera_to_world\"] = list(np.array(frame['transform_matrix']).reshape(-1))\n",
    "    new_path[\"fov\"] = 75\n",
    "    new_path[\"aspect\"] = 1.7777777777777777\n",
    "    \n",
    "    updated_camera_paths.append(new_path)\n",
    "\n",
    "\n",
    "data1[\"keyframes\"] = updated_keyframes\n",
    "data1[\"camera_path\"] = updated_camera_paths\n",
    "\n",
    "# Writing JSON data\n",
    "with open('transforms_camera_path.json', 'w') as f:\n",
    "    json.dump(data1, f)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5379a69b-721a-4aba-9c5e-bf006ada2866",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "e9b10be8-a4eb-4b29-be52-e26da8bb5db1",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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