{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "3d2d126c-6665-4d0d-8996-f5987027a228",
   "metadata": {},
   "source": [
    "# Saving a multichannel audio to one channel per file"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "a37f782b-99fd-4d5a-8b72-8c3faf8a3d34",
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "import cutcutcodec"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "9f69ddd5-2674-4645-a31d-f6911d520bf2",
   "metadata": {},
   "outputs": [],
   "source": [
    "from cutcutcodec.utils import get_project_root\n",
    "\n",
    "input_file = get_project_root().parent / \"media\" / \"audio\" / \"cutcutcodec.ogg\"  # your audio path"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "e71ec496-1952-42b4-bebf-53717ffb0b07",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "WARNING:root:audio frame overlap of 0.051833 seconds detected                                  | 0.00s/1.99s [00:00<?]\n",
      "Encoding audio_front_left.mp3: 100%|███████████████████████████████████████████████████████| 1.99s/1.99s [00:02<00:00]\n",
      "WARNING:root:audio frame overlap of 0.051833 seconds detected                                  | 0.00s/1.99s [00:00<?]\n",
      "Encoding audio_front_right.mp3: 100%|██████████████████████████████████████████████████████| 1.99s/1.99s [00:01<00:00]\n"
     ]
    }
   ],
   "source": [
    "with cutcutcodec.read(input_file) as container:  # open the audio file\n",
    "   stream = container.out_streams[0]  # get the audio stream\n",
    "   for channel, name in stream.layout.channels:  # iterate on each channel\n",
    "       mono = container.apply_audio_equation(f\"{channel}_0\")   # extract only one channel\n",
    "       cutcutcodec.write(\n",
    "           mono.out_streams,\n",
    "           f\"/tmp/audio_{name.replace(' ', '_')}.mp3\",\n",
    "           streams_settings=[{\"encodec\": \"libmp3lame\"}],\n",
    "       )  # lossly\n",
    "       # write(\n",
    "       #     mono.out_streams,\n",
    "       #     f\"/tmp/audio_{name.replace(' ', '_')}.wav\",\n",
    "       #     streams_settings=[{\"encodec\": \"pcm_f32le\"}],\n",
    "       # )  # lossless"
   ]
  }
 ],
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