Allow the ability to define the initial timestamp for the packetizer. #111
Description
Summary
Currently the timestamp is defined using a random number
Line 40 in 319e780
This doesn't allow for syncing tracks from multiple sources where we can then swap the tracks from the server without repair.
Motivation
I have 4 video sources with different quality settings but they cannot be used with ABR since the initial timestamps do not correspond with each other.