wai/extensions/live-contribution.md profiles SRT and RIST onto a room's tracks through the ingest gateway: the one-time session resource, the listener's checks and codes, the gateway calling, RIST's port, CNAME and PSK; the transports as the gateway runs them; the transport stream onto the tracks; and the link record WCL1, its account, parts and chain, how a part and a series are verified, the size bound, the refusals, and the RIST texts' patent notices. live-conformance/live_contribution_verify.py is written from that text alone, standard library only, with mutation runs and dropped-check runs. The corpus gains vectors that isolate each check the verifier found uncovered. Interop with the reference tools, run locally as test peers (ignored unless named by environment variables): their SRT caller and listener and RIST sender and receiver of both profiles against joule-contrib, and their SRT caller and RIST sender into the gateway with an encoder's H.264, HEVC and AAC, through lossy paths. Two fixes they found: an SRT recovery margin is held to the window, and no part is cut before the first sequence number resolves. Co-Authored-By: Claude Opus 5.5 <[email protected]>
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