MediaRecorder Audio Delay

Question

Although there are a few questions about this stackonflowon thread and across the web, for example:

• The MediaRecorder class starts recording audio after a short delay
• Why does MediaRecorder delay the start of recording?
• MediaRecorder silence when recording starts (delay?)
• Issue 15953: MediaRecorder class starts recording audio after a short delay

These links are from 2010 to 2013, while a final decision has not yet been found.

My situation looks like this:

• User clicks the Record button
• I'm starting a poll getMaxAmplitude ()
• When the amplitude is greater than some value, say 5000, I launch my MediaRecorder. (functional requirement)
• MediaRecorder records video and audio.
• The user clicks the Stop Recording button, saving the output as a .mp4 file.

I expected MediaRecorder to record both video and audio at any time. Unfortunately, this is not the case.

As you can see from the first link, there is a delay, so the beginning is not recorded (which is the most important part of the record in my case). A possible solution would be to use AudioRecorder or RehearsalAudioRecorder. Unfortunately, they only record audio.

How can I confront this problem?