stream.dash: fix segment availability times #5213
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The segment availability "anchor time" depends on the sum of the manifest's `availabilityStartTime` and the period's `start` attribute, for both static and dynamic manifests. Fix segment availability times: - Set the correct `available_at` value for static manifests with segment templates and segment timelines instead of using the current time - Set the `available_at` value for `SegmentList` segments instead of defaulting to `EPOCH_START` - Set the `available_at` value for all initialization segments Fix segment numbers: - The number offset now also takes the period start into consideration Also: - Allow passing keywords to child node constructors - Keep the `Period` reference on `SegmentList`, `SegmentTemplate` and `Representation` - Check segment availability times in certain tests - Rename DASH manifest fixture files of updated tests
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The segment availability "anchor time" depends on the sum of the manifest's
availabilityStartTimeand the period'sstartattribute, for both static and dynamic manifests.Fix segment availability times:
available_atvalue for static manifests with segment templates and segment timelines instead of using the current timeavailable_atvalue forSegmentListsegments instead of defaulting toEPOCH_STARTavailable_atvalue for all initialization segmentsFix segment numbers:
Also:
Periodreference onSegmentList,SegmentTemplateandRepresentationThese are just minor fixes because the period start time of the first period (which we only support anyway) is zero most of the time.
The segment number fix is a "side-effect" of this PR. However, it's not a full fix and there's still something wrong with the offset calculation.