Request sidx defined segments from DASH SegmentBase streams

[sevagsim]

The following test file cannot be played in the reference player:

https://dash.akamaized.net/dash264/TestCases/10a/1/iis_forest_short_poem_multi_lang_480p_single_adapt_aaclc_sidx.mpd

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[forbesjo]

Looks like the segment list is not being generated correctly by our mpd parser

[omarroth]

For segment base streams only the initialization segment is provided by the manifest, which mpd-parser provides. It seems to me then that there is a problem in http-streaming with fetching the initialization segment and getting info about the rest of the media.