VideoNodeHardware‑accelerated video streaming for Linux

V4L2 capture, GPU composition, RTSP/SRT/WebRTC out. Driven by a single Go daemon.

Three-entity pipeline

Sources, composers, and streams as independent top-level entities, each with its own lifecycle, CRUD API, and ref-based wiring.

Rockchip MPP, VAAPI, software fallback. Run validate-encoders to probe which encoders work and record the result.

Multi-input GPU canvas with per-source layout and perspective transforms, edited via unary RPCs without restarting the pipeline.