caspar-AV v0.1.0

The first release: a live-events media server built on CasparCG as the render
engine — screens on a canvas, frame-accurate cues, a media library, GDD-driven
template forms and a trigger grid, in a browser.

CasparCG speaks AMCP over raw TCP and pushes state as OSC over UDP, neither of
which a browser can do, so this is a small Rust bridge daemon (caspar-avd)
that holds the connection and serves a React console over ordinary HTTP.

What it does

Page
Media	Library from media-scanner with thumbnails; double-click to play
Screens	Output mapping — drag to write MIXER FILL, corner-pin writes MIXER PERSPECTIVE
Channels	Live state from OSC, plus a raw AMCP command line
Cues	Fired as one BEGIN/COMMIT batch, so every screen changes on the same frame
Templates	Data forms generated from a template's own GDD schema
Grid	Cues as trigger pads

Verified against a real server

Developed against the CasparCG 2.5.0 source, then checked against a running
2.5.0 server with two tools that share no code with the crates — a raw-socket
protocol probe (22/22 checks) and a geometry verifier that has the server PRINT
real frames. That found six genuine bugs, including one that made every
MIXER and CG command fail: a two-word command puts its target between its
words (MIXER 1-10 FILL …, not MIXER FILL 1-10 …).

docs/amcp.md records the protocol as it actually behaves, including several
points where the community wiki is wrong.

Not yet verified: real output hardware (DeckLink, NDI, projectors),
broadcast resolutions, sustained load, or a live show. The HTML/CEF producer was
never exercised — the test rig had no GPU. See docs/scope.md.

Running it

tar xzf caspar-av-<platform>.tar.gz
./caspar-avd --host <your-caspar-host> --show myshow.json

Then open http://localhost:8080. No CasparCG to hand? python3 scripts/fake-caspar.py speaks real AMCP framing and pushes real OSC telemetry.

Against your own server, python3 scripts/protocol-probe.py --host <host>
re-checks every protocol assumption this build relies on.

Notes

• Needs media-scanner for the media library, templates and thumbnails —
  CasparCG 2.5 proxies CLS/TLS/CINF/THUMBNAIL to it and has no listing of
  its own. The console says so plainly when it is not running.
• Binaries are unsigned. On macOS, clear the quarantine flag before running:
  xattr -dr com.apple.quarantine caspar-avd.
• Linux and Windows binaries are cross-compiled from macOS and compiled-only —
  they have not been executed on those platforms.