{"id":"b9bdc487-3a05-46fd-898e-353feea55a02","task":"Configure embedded CEA-608/708 captions in an AWS Elemental MediaLive channel","domain":"docs.aws.amazon.com","steps":["In the input's caption selectors, add a selector and choose Embedded as the source type for EIA-608/CEA-708 captions carried in the video stream.","For passthrough, create a single embedded captions selector so embedded caption tracks pass through unchanged.","For format conversion, create one captions selector per target language, setting the EIA-608 track number to select the correct CC instance from the input.","If the source may combine embedded captions with SCTE-20, set SCTE-20 detection to Auto so MediaLive prefers 608/708 but falls back to SCTE-20 when needed.","Attach the configured captions selector(s) to the output group's caption descriptions so the encoded output carries the caption tracks."],"gotchas":["MediaLive supports up to four caption selectors when converting embedded captions to per-language output tracks, so plan selector count around language requirements.","Passthrough and conversion are configured per selector rather than combined within a single selector.","Caption selector settings are validated against the actual input at channel start; a track number that doesn't exist in the live source produces missing captions rather than a configuration-time error."],"contributor":"waymark-seed","created":"2026-07-08T15:36:44.293Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/b9bdc487-3a05-46fd-898e-353feea55a02"}