Add support for SCTE-35 markers when payload is provided as Signal
Created by: tomraut
Issue is already talked through on Slack with @jeoliva
We have a sample stream https://mtvdashliveusptest1-a.akamaized.net/live/E39USP/E39USP.isml/E39USP.mpd with SCTE-35 markers. Unfortunately dash.js (tested with 2.9.0) is unable to parse actual payload content as it is defined as Signal:
/DAlAAAAAA4QAP/wFAUAAAAAf+//BrL+sP4AG3dAAAEAAAAABHYFbQ==