MPD Chaining feature support

[niteeshbhat]

I am running the DASH client for MPD chaining test vectors. The two cases, Regular chaining and Fallback chaining are not working as expected. I am giving reference to both kinds of vectors here.

Environment

• The MPD passes the DASH-IF Conformance Tool on http://dashif.org/conformance.html
• The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream
• The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• The issue occurs in the latest reference client on http://dashif.org/reference/players/javascript/ and not just on my page

• Link to playable MPD files:
  Regular chaining MPD: http://dash.akamaized.net/dash264/TestCasesIOP33/MPDChaining/regular_chain/2/manifest_regular_MPDChaining_OnDemand.mpd
  Fallback chaining MPD: http://dash.akamaized.net/dash264/TestCasesIOP33/MPDChaining/fallback_chain/1/manifest_fallback_MPDChaining.mpd

• Dash.js version: 2.4.1 (latest)

• Browser name/version: Microsoft Edge , Chrome

• OS name/version: Win 10

Steps to reproduce

Start DASH client in the Microsoft Edge, paste MPD URL, then Load (with Loop option turned off).

1. Wait till the end of current playback in the case of regular chaining MPD.
2. Wait till the error condition is triggered in the case of fallback chaining MPD (Broken URL is the error which occurs near the end of playback , -playtime 10:49 approx.)

Observed behaviour

1. Regular chaining MPD:-At the completion of the current content playback, the player stops. However the expected behaviour is that a new manifest's (chained-to MPD) content has to be played after the completion of current playback.
2. Fallback chaining MPD:-At the occurence of the error condition, player stops.Expected behavior is that a new content has to be played after the occurence of error condition.

Console output

-------Regular chaining MPD------
[5551436] Stream is complete
Debug.js (108,13)
[5559237] Native video element event: pause
Debug.js (108,13)
[5559250] Native video element event: ended
Debug.js (108,13)

-------Fallback chaining MPD------
[6708486] Schedule controller stopping for video
Debug.js (108,13)
[6711280] Buffer is empty! Stalling!
Debug.js (108,13)
[6711290] Waiting for more buffer before starting playback.
Debug.js (108,13)

[davemevans]

MPD Chaining is not currently supported. See #1770 for feature request.

[epiclabsDASH]

Closing. Let's follow MPD chaining feature in #1770.