# rust-mp4ameta
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A library for reading and writing iTunes style MPEG-4 audio metadata.

## Usage
```rust
fn main() {
  	let mut tag = mp4ameta::Tag::read_from_path("music.m4a").unwrap();

  	println!("{}", tag.artist().unwrap());

  	tag.set_artist("artist");

  	tag.write_to_path("music.m4a").unwrap();
}
```

## Supported Filetypes
- M4A
- M4B
- M4P
- M4V

## Useful Links
- [AtomicParsley docs](http://atomicparsley.sourceforge.net/mpeg-4files.html)
- [Mutagen docs](https://mutagen.readthedocs.io/en/latest/api/mp4.html)
- QuickTime spec
    - [Movie Atoms](https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html)
    - [Metadata](https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/Metadata/Metadata.html)
- [QuickTime container](https://wiki.multimedia.cx/index.php/QuickTime_container)
- [MusicBrainz Picard tag mapping](https://picard-docs.musicbrainz.org/en/appendices/tag_mapping.html)
- [Filetype list](https://ftyps.com/)

## Testing
__Run all tests:__<br/>
`cargo test`

__Test this library on your collection:__<br/>
`cargo test -- --show-output collection <path>`

