Annex I Query Parameters
From v1.7.0, there is basic support for Annex I - Flexible Insertion of URL Parameters.
Using the /urlgen page, you can specify query-string parameters that are added in the livesim2 URL and in the MPD query.
A resulting URL may look something like:
https://livesim2.dashif.org/livesim2/annexI_a=1,b=2/testpic_2s/Manifest.mpd?a=1&b=2
Note that there is both a segment of the URI annexI_a=1,b=2/ and a matching query ?a=1&b=2.
In the MPD the video adaptationSet signals that all video segments should have the
query string ?a=1&b=2 added.
If the client is requesting video segments without this query string,
a 400 HTTP error will be returned with the body containing the text query check mismatch.
Note that audio segments should not have the query parameters attached according to the MPD.