few seconds of recording are missing at the beginning (especially on IOS)

[davidmanson]

Hello and thank you for your amazing work. I tested a few library out there but this one seems to be the way to go 👍.

I successfuly implemented the library and it's working well accross all the devices.
Unfortunatelly I noticed a "bug" that is also present in the "encoder.html" demo :
On the first recording, the 2 or 3 first seconds are missing. On the nexts recordings, the problem is a lot smaller.
If it's a performance problem, I wish I could have the onstart event triggered only when it's actually recording.

Thank you,