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20 lines
1.6 KiB
Markdown
20 lines
1.6 KiB
Markdown
# mediaMTX Integration
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Each rover runs mediaMTX locally to capture the Pi camera and publish it upstream, while the control server hosts a central mediaMTX instance that fans video out to drivers and spectators.
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## Pi (publisher)
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- mediaMTX samples the Pi camera (`paths.rovercam.source: rpiCamera`) and exposes the HTTP API on `http://127.0.0.1:9997`.
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- `/etc/roverd.yaml` contains `media.publishUrl`, pointing at the control server’s WHIP endpoint for that rover (e.g. `https://control.example.com/whip/roomba-alpha`). No auth is required when the Pi network is trusted.
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- The `media.manage` flag keeps the local service alive via `systemctl` and hits the API for health checks (`media.healthUrl`, defaults to `http://127.0.0.1:9997/v3/paths/list`).
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## Control server (viewer)
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- The central mediaMTX instance accepts WHIP ingest at `/whip/<roverId>` and serves WHEP playback at `/whep/<roverId>`.
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- The Node server issues viewer sessions (one per socket) via `video:request`, and mediaMTX calls back into `GET /mediamtx/auth?session=<id>&roverId=<name>` before letting a client access `/whep/<roverId>?session=<id>`. Lockdown mode simply stops minting sessions for non-lockdown admins.
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## Driver / spectator UIs
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- When a user requests video the browser asks the Node server for a session token, and if the current mode/role allows it, the server returns the WHEP URL plus the session id.
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- Spectator mode and lockdown are enforced purely on the Node server: no direct Pi URLs are ever exposed, and once a user has a session it remains valid until they disconnect or lockdown revokes it.
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