Insert SCTE-35 splice_insert cue markers into a live HLS stream for ad break signaling

Steps

1. At the contribution encoder or live packager, inject SCTE-35 splice_insert() messages into the MPEG-TS program as a dedicated PID at the desired ad break start and end points.
2. Configure the packager (MediaPackage, Wowza, Unified Streaming, etc.) to parse the SCTE-35 PID and map splice messages to HLS EXT-X-CUE-OUT / EXT-X-CUE-IN tags in the media playlist; the break duration from the SCTE-35 message populates the EXT-X-CUE-OUT duration attribute.
3. For more precise segment boundaries, configure the packager to force a segment split at the splice_insert trigger point so the ad break begins on a clean segment boundary.
4. Pass the HLS stream with SCTE-35 cues to a server-side ad insertion (SSAI) service such as AWS MediaTailor, which replaces the cue-out window with ad content before delivering personalized manifests to viewers.
5. Verify cue propagation by inspecting the live HLS manifest for EXT-X-CUE-OUT and EXT-X-DATERANGE tags at the expected timecodes.
6. For DASH delivery, the packager should emit DASH Event Stream elements (schemeIdUri aligned to the SCTE-35 DASH ESAM specification) in the MPD at the corresponding positions.