Why it matters

DASH complements HLS for full cross-platform reach. Understanding both enables best-of-both delivery.

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The architecture

Segments: fMP4 typical. Similar chunking to HLS.

Manifest: MPD (Media Presentation Description) XML file. Describes streams, segments, timing.

DASH structurefMP4 segmentschunksMPD manifestXML descriptionAdaptive bitratesame ideaCMAF: common container for HLS+DASH; one encode covers both
DASH components.
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How it works end to end

Codecs: any (H.264, H.265, AV1). No codec restriction.

CMAF: Common Media Application Format. Same fMP4 files work for both HLS and DASH.

Live: rolling MPD for live streams.

DRM: Widevine, PlayReady support via CENC (Common Encryption).