FG-2933: Add mp4a.40.2 capture to MCAP recording demo

[fgwt202412]

1. FG-2933: Add recorder support for audio frames to MCAP recording demo #1292
2. FG-2933: Add microphone capture (opus) to MCAP recording demo #1293
3. FG-2933: Add mp4a.40.2 capture to MCAP recording demo #1295 <-- you are here

Changelog

Add microphone capture (mp4a.40.2) to MCAP recording demo

Docs

None

Description

Foxglove does not currently support audio messages of any kind. In order to support playback of audio in Foxglove Studio, this stack of PRs adds support to record MCAP files with audio.

This PR adds the ability for a user to select a microphone for capture with the mp4a.40.2 encoding.

• Show a checkbox for Microphone (mp4a.40.2) when supported
• Configure multiple encoders for use
  • Web Audio API
• Record mp4a channel in the Recorder

Tested locally using the MCAP recording demo and a new Audio panel.

FG-2933

Supported AudioEncoder and AudioDecoder configs in Chrome:

[linear]

FG-2933 Notify customers: Audio support