Add media server 3.5.0 release notes - #797
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| #### Features | ||
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| - Added UTC timestamp insertion for H.264 broadcasts. When enabled, the platform stamps each video frame with the server's UTC receive time as frame metadata (an unregistered SEI message, in Unix-epoch milliseconds), so players and downstream tools can measure end-to-end latency, align multiple feeds, or correlate media with external events. It is available for RTMP, RTMPS, and SRT contribution, applies to both passthrough and transcoded layers, and does not re-encode passthrough video. Enable it on a publish token, or for an individual broadcast with the `enableUTCInsertion` publishing parameter. Frames that already carry an `onFi`/AMF sender timestamp are never overwritten, so this is intended for sources that do not already send timecodes. |
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🔍 Undocumented publishing parameter referenced without a link
The new entry references the enableUTCInsertion publishing parameter, but that parameter is not present in the Publishing Parameters documentation (unlike other changelog entries which link to related docs such as /millicast/distribution/re-streaming). Readers who follow the changelog will have no place to look up valid values or how to read the SEI timestamp. Worth confirming the follow-up docs change lands close to this release.
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Known and called out in the PR description: enableUTCInsertion is not yet in the Publishing Parameters table, which is why the note describes the parameter instead of linking to it. The follow-up docs change (parameter row + how to read the SEI timestamp in the player, cross-linked from the frame-metadata guide) is deliberately kept separate for review; flagged to the release owner to land it alongside this.
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| Updates to Dolby OptiView's Real-time Streaming Platform and Media Server. | ||
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| ## 2026-08-06 |
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🔍 Release date heading is a placeholder
The date heading 2026-08-06 matches the PR authoring date rather than an actual release date, and the description states 3.5.0 has not yet shipped. Since entries are ordered newest-first by this heading, merging before the real ship date would publish an inaccurate release date to customers.
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Correct, and intentional — the PR description states this heading is a placeholder that must be set to the actual 3.5.0 production release date before merge. Not changing it here since the ship date isn't fixed yet.
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Summary
Adds the Media Server 3.5.0 entry to
millicast/changelog/changelog-dolbyio-platform-media-server.md, same shape as the 3.4.3 entry (#741).Only customer-visible changes from
v3.4.3...v3.5.0are included:enableUTCInsertion. Frames that already carry anonFi/AMF sender time are not overwritten — the note says so explicitly, because enabling it on a source that emitsonFion only some frames produces timestamps that alternate between the encoder clock and the server clock.The rest of the release (per-subsystem EventLoop metrics + Grafana dashboard, a Redis key-growth fix, packer/CI and base-image work, internal tooling) has no customer-visible surface and is deliberately excluded.
Two things for the reviewer:
2026-08-06, a placeholder — 3.5.0 has not shipped to production yet. It needs to be set to the actual release date before this merges.enableUTCInsertionis not yet documented in the Publishing Parameters table, so the release note describes the parameter without linking to it. Adding that row (plus a short "reading the timestamp in the player" section) is left as a separate change so it can be reviewed on its own.prettier --checkpasses on the modified file.Link to Devin session: https://dolby.devinenterprise.com/sessions/129703589f184ee59a13ec158d646653
Requested by: @bcostdolby