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# YouToo
YouToo takes a YouTube playlist ID, and:
* downloads;
* sorts;
* syncs; and
* adds metadata
to songs.
## Requirements
* NodeJS 14 or later
* ffmpeg
* yt-dlp
* ImageMagick
## Usage
First, go to the folder where you downloaded the source code (the folder where the "index.js" file is located). Also make sure `node`, `ffmpeg`, `yt-dlp` and `magick` are in your `PATH`
> Running `npm install` shouldn't be required, but if you encounter issues you may need to run it.
On Windows (PowerShell):
```
node .\index.js <your YouTube playlist ID> [album name]
```
On POSIX systems (Linux, macOS, *BSD, ...):
```
./youtoo <your YouTube playlist ID> [album name]
```
> Argument `[album name]` is optional. If used, YouToo will make it so that all the songs belong to the same album rather than the auto-detected albums. Useful to keep playlists organized.
After running this command (and after waiting while it runs), you get the final audio files in `./_youtoo/Result`, it is suggested that you keep these here for syncing to work (e.g. use a symbolic link).
## How does it work?
### Downloading
Downloads are processed using regular `yt-dlp` commands. Audio is downloaded as an MPEG-4 audio file, and then transcoded into MPEG-3 when metadata is later added.
### Sorting
YouToo downloads songs in the order they are in your playlist. Although the final files are sorted alphabetically with their video ID, all the download process is done in your playlist's order.
### Syncing
When you give YouToo your playlist ID, it will check which songs have already been downloaded. If a song is already downloaded, it will ignore it. Additionally, if a song is downloaded locally but not in the playlist anymore, it will be deleted.
### Metadata
The trickiest part of YouToo. It will use a bunch of different regular expressions that have been tested against Minteck's playlists to grab the following information from the videos:
* title;
* artist(s);
* album;
* release date
It will first attempt to get this data from what YouTube gives, and eventually fall back to parsing the video title using regular expressions.
> If the regular expressions doesn't correctly catch the title/artist(s)/album, please report an issue to this project to help improve accuracy. Make sure you embed the `./_youtoo/Metadata/<your video ID>.json` file so we can have a look at what's wrong.
## Troubleshooting
If you have issues running YouToo, follow these steps:
1. **update yt-dlp.** YouTube's API change frequently, and yt-dlp is frequently updated. Make sure you always run the latest version to avoid issues.
2. **update NodeJS.** We recommend using the latest stable release, or the latest long term support release. YouToo has been tested on NodeJS 17.3.0.
3. **free up disk space.** Required disk space depends on the size of your playlist. To be safe, make sure you have 16MB per song.
4. **delete the `./_youtoo` folder.** This will completely reset YouToo, so in case a cache file is corrupted, it will all be reset. You may backup the `./_youtoo/Result` folder if you don't want to have to download all the songs again.
5. **run `npm install`.** This will update all dependencies and perhaps solve the issue.
If these steps didn't help you, open an issue to this project. We will be more than happy to help!
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