MPD@availabilityStartTime of 0 incorrectly triggers assertion about not having AST

[sandersaares]

Have you read the FAQ and checked for duplicate issues:
yes

What version of Shaka Player are you using:
2.2.6-debug

Can you reproduce the issue with our latest release version:
unknown, used demo app

Can you reproduce the issue with the latest code from master:
unknown, used demo app

Are you using the demo app or your own custom app:
demo app

If custom app, can you reproduce the issue using our demo app:
N/A

What browser and OS are you using:
Chrome 62, Windows 10

What are the manifest and license server URIs:
https://media.axprod.net/PublicVideos/DashAstZero/Manifest.mpd

No segments are publically available - manifest only. Should be enough to reproduce.

What did you do?
Hit Load to start playback.

What did you expect to happen?
Player attempts to play back live presentation, no errors reported.

What actually happened?
Assertion failed: Detected as IPR stream, but does not match our model of IPR!

This appears to be because MPD@availabilityStartTime is "1970-01-01T00:00:00Z" which gets parsed to 0 in dash_parser.js. Because of that the presentationStartTime_ check in the below assertion from presentation_timeline.js fails (0 == null).

      goog.asserts.assert(this.presentationStartTime_ != null &&
                          this.segmentAvailabilityDuration_ == Infinity,
          'Detected as IPR stream, but does not match our model of IPR!');

[TheModMaker]

Duplicate of #1148

0 != null, the problem is that segmentAvailabilityDuration_ is not infinity. This is the same problem as your other manifest, your live streams have a duration. We'll continue the discussion there.

[sandersaares]

I confirm your assessment of the facts. Apologies for insufficient investigation on my side!