How to add text notes to Video recorded in Android Application

Im investigating the use of android.media.MediaRecorder in my current Android application.

I've based my application on this Google Samples project

I can record video & audio using this sample project as a base

However I cannot see how I can associate text notes to the video.

My use case consists of "bookmarking" the video and adding a brief note at a particular point in time while still recording the Video & Audio.

I want to allow the user to be able to add multiple text notes at any point in the video as its being recorded.

MediaRecorder doesnt appear to have any methods that expose current elapsed recording time, will I have to keep my own timer and sync it to start, pause resume of my video recording?

Is theer another video recording library I can employ that will support my use case?

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