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# wavinfo

The `wavinfo` package allows you to probe WAVE and [RF64/WAVE files][eburf64] and extract extended metadata, with an emphasis on film, video and professional music production metadata.

`wavinfo` reads:

* __Broadcast-WAVE__ metadata<sup>[1][ebu]</sup>, including embedded program
  loudness and coding history, if extant. This also includes the SMPTE UMID<sup>[2][smpte_330m2011]</sup>.
* __iXML__ production recorder metadata<sup>[3][ixml]</sup>, including project, scene, and take tags, recorder notes
  and file family information.
* Most of the common __RIFF INFO__<sup>[4][info-tags]</sup> metadata fields.
* The __wav format__ is also parsed, so you can access the basic sample rate and channel count
  information.

In progress:
* ADM metadata consilient with the output of the __Dolby RMU__, perhaps later fully complaint with [ITU BS.2076-2][adm].
* iXML `STEINBERG` sound library attributes.
* __NetMix__ library attributes.
* Pro Tools __embedded regions__.

[ebu]:https://tech.ebu.ch/docs/tech/tech3285.pdf
[adm]:https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2076-2-201910-I!!PDF-E.pdf
[smpte_330m2011]:http://standards.smpte.org/content/978-1-61482-678-1/st-330-2011/SEC1.abstract
[ixml]:http://www.ixml.info
[eburf64]:https://tech.ebu.ch/docs/tech/tech3306v1_1.pdf
[info-tags]:https://exiftool.org/TagNames/RIFF.html#Info

## Demonstration

The entry point for wavinfo is the WavInfoReader class.

```python
from wavinfo import WavInfoReader

path = '../tests/test_files/A101_1.WAV'

info = WavInfoReader(path)
```

The package also installs a shell command:

```sh
$ wavinfo test_files/A101_1.WAV
```

### Basic WAV Data

The length of the file in frames (interleaved samples) and bytes is available, as is the contents of the format chunk.

```python
(info.data.frame_count, info.data.byte_count)
>>> (240239, 1441434)
(info.fmt.sample_rate, info.fmt.channel_count, info.fmt.block_align, info.fmt.bits_per_sample)
>>> (48000, 2, 6, 24)
```

## Other Resources

* For other file formats and ID3 decoding, look at [audio-metadata](https://github.com/thebigmunch/audio-metadata).
