**Single track**
**Playlist**
## Install
**Windows**
```powershell
irm https://ohcass.github.io/music/install.ps1 | iex
```
**Linux / macOS**
```sh
curl -fsSL https://raw.githubusercontent.com/ohcass/music/main/scripts/install.sh | sh
```
Build from source
```sh
git clone https://github.com/ohcass/music.git
cd music
go build -o radii5 ./cmd/music
```
## Usage
```sh
radii5 # default: mp3 audio
radii5 --type video # download as mp4 video
radii5 --type video --quality 720 # 720p video
radii5 --mp4 720 # shorthand: 720p video
radii5 --mp4 # video at default quality (1080)
radii5 --format flac # audio format
radii5 "https://youtube.com/playlist?list=..." # playlist (audio)
radii5 --mp4 "https://youtube.com/playlist?list=..." # playlist (video)
radii5 --threads 16 --workers 6 # tune performance
```
### Flags
| Flag | Default | Description |
|---|---|---|
| `--format`, `-f` | `mp3` | Audio format: `mp3`, `flac`, `m4a`, `opus`, `wav` |
| `--output`, `-o` | `~/Music/radii5 downloads` | Output directory |
| `--threads`, `-t` | `8` | Parallel download chunks |
| `--workers`, `-w` | `4` | Concurrent playlist download workers |
| `--type` | `audio` | Media type: `audio` or `video` |
| `--quality`, `-q` | `1080` | Video height: `144`, `240`, `360`, `480`, `720`, `1080`, `1440`, `2160` |
| `--mp4` | — | Shortcut for `--type video`. Optionally followed by quality (e.g. `--mp4 720`) |
## Features
- **Audio download**: Downloads best available audio, converts to MP3 (LAME V2) with metadata tags
- **Video download**: Downloads best video+audio up to requested quality, merges to MP4
- **Playlist support**: Concurrent playlist downloads with per-track progress, retry logic, smooth animations
- **Fast parallel downloads**: Chunked HTTP downloads with byte-level progress tracking
- **Cross-platform**: Windows, Linux, macOS
## Requirements
- [yt-dlp](https://github.com/yt-dlp/yt-dlp) (bundled with installer)
- [ffmpeg](https://ffmpeg.org/) (bundled with installer)
## License
MIT