Extract sensor metadata from wav files

[atruskie]

Wildlife acoustics now apparently embeds metadata into the headers of WAVE files. This information is only encoded by the newer SM3 and SM4 sensors.

In particular the sensor's unique id is stored.

When harvesting, this metadata should be extracted and stored in the audio recordings notes field

[cofiem]

Really? Huh. Fair enough. Ffmpeg to the rescue!

[atruskie]

Adding to this for my record, here's a hex snippet from the start of an SM2 file. Interestingly enough there seems to be a sensor model, firmware version, and datestamp (with timezone!) in the INFO header.

[atruskie]

Attached is the official WA meta header definition. It's was released early in 2017 as an opensource header.

wa_meta-1.1.zip