Does the GoPro expose a way to send custom data for inclusion in the media container (.mp4)?

[foodini]

It's pretty easy to add a new media stream to a container (streams like audio-left, audio-right, and video to a .mp4). I'm hoping that the GoPro exposes a way to include such data in the recording it's making. I'd like to send flight telemetry (throttle, orientation, rudder/yoke/flap position, possibly even my radio chatter and verbal comments) to the camera so I don't have to have my custom hardware recording all these statistics to a separate storage device, then go through all the hell of syncing that data with the video in postprocess before I render it all over the video. It would be far more convenient for the camera to accept the data wirelessly, timestamp it as it timestamps all other packets in the media streams, and store it in the GoPro's memory card.

I've already written everything I need to render the data over the .mp4, but it's unwieldy to sync. If the camera timestamped and saved it for me, it would all be trivial and my postprocess would require no manual steps at all.