Offset in seconds from the start of the live event, defining the point from which all segments within that duration will be removed from the given manifests.
E.g.: The segment length is 2 seconds and a timeshift of 120 seconds (2 minutes) is configured.
The manifest contains 60 segments with the last segment number being 80 (segment_80.ts).
This means the manifest contains segment_20.ts to segment_80.ts (timeshift of 2 minutes equals 60 segments in manifest)
If you set offsetInSeconds to 120, all segments below segment number 60 (segment_60.ts) will be removed. (targetSegmentNumber = offsetInSeconds / segmentLength)
The manifests will then contain segment_60.ts to segment_80.ts
Note: Only offsetInSeconds or residualPeriodInSeconds can be set.
