SASH, HLS, and DASH

What does SASH add to DASH?

end_segment to signal the last segment of a representation set
manifest_ttl to define manifest refresh behavior

What concepts does SASH remove from DASH?

Multiple profiles
Removes support for a lot of edge cases by removing some fields, including...
- ~~segmentAlignment="true"~~ Segments in an adaption set must be aligned
- ~~startWithSAP="1"~~ Every Segment must start with an SAP
Removes periods as a top level element
scanType, sar, timescale

What concepts does SASH borrow from HLS?

Segmented WebVTT for subtitles
Durations declared in a sensible, consistent format

What HLS concepts are not included in SASH?

Binding of audio representation to video representation
- And thus, forcing of all adaptation sets being the same size
AUTOSELECT on alternate adaptation sets
DEFAULT setting on alternate adaptation sets

What concepts are new to SASH?

Declaration of manifest TTL
Explicit version declaration
One manifest format for Live and VOD content, and no byteranges