Dynamic validator clock synchronization

[eceozturk]

There is a time reference provided by Akamai (see below link). This can be used in the dynamic service validator.

https://developer.akamai.com/legacy/learn/Akamai_Time_Reference/AkamaiTimeReference.html

[dsilhavy]

It is important to use the reference time server defined in the MPD rather than using the same time source for all MPDs. However, the Akamai server can serve as fallback if no reference time server is provided in the MPD. We can probably reuse some of the existing dash.js logic for this: https://github.com/Dash-Industry-Forum/dash.js/blob/development/src/streaming/controllers/TimeSyncController.js