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Add support for multi video track subscriber in local_video example #1105

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Add support for multi video track subscriber in local_video example #1105

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6 changes: 4 additions & 2 deletions examples/local_video/README.md
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Expand Up @@ -8,7 +8,7 @@ For smoother local rendering, especially above 720p, run the publisher/subscribe

- list_devices: enumerate available cameras and their capabilities
- publisher: capture from a selected camera and publish a video track
- subscriber: connect to a room, subscribe to video tracks, and display in a window
- subscriber: connect to a room, subscribe to video tracks, and display each track in its own window

LiveKit connection can be provided via flags or environment variables:
- `--url` or `LIVEKIT_URL`
Expand Down Expand Up @@ -137,6 +137,8 @@ Subscriber flags (in addition to the common connection flags above):
- `--e2ee-key <key>`: Enable end-to-end decryption with the given shared key. Must match the key used by the publisher.

Notes:
- If the active video track is unsubscribed or unpublished, the app clears its state and will automatically attach to the next matching video track when it appears.
- The subscriber opens a separate window for every video track it is subscribed to. A small status panel in the main window shows the room, identity, filter, and the list of currently-displayed tracks.
- Closing a track's window unsubscribes from that publication. The window reappears automatically if the publisher republishes the track (or publishes a new one) and it still matches the optional `--participant` filter.
- If the active video track is unsubscribed or unpublished, its window is closed automatically.
- For E2EE to work, both publisher and subscriber must specify the same `--e2ee-key` value. If the keys don't match, the subscriber will not be able to decode the video.
- The timestamp overlay updates at ~2 Hz so the latency value is readable rather than flickering every frame.
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