#t=xxx , have confilct with period @start

[AUGxhub]

according spec 23009-1 5th ,

C.4 MPD Anchors

This notation shall only be used if MPD@availabilityStartTime is present.
This t=posix:xxx notation parameter shall not be used if a period parameter is used. In addition, at most one of the two parameters, period and t shall be present in an anchor.

there still have issue that , if Period@start exist , and #t exist at same time for live/dynamic contents
it will hurt to find out resut will be cotent time = MPD@availabilityStartTime + Period@start + #t
which is unknwon behavier .

need some rule for this case
1 forbidden it
2 add rule for when it's live ,and Period@start exist , #t should be base on MPD@availabilityStartTime + Period@start rather MPD@availabilityStartTime only

please consider it

[haudiobe]

f2f 2022/12/13

• we need to check with dash.js developer on what exactly needs to done