chore: snapshot livekit-cameras after serial pin + speechbrain lengths fix

smoke_test.py

@@ -0,0 +1,43 @@
+"""Smoke test: one camera worker against the local LiveKit server, ~20 s."""
+import json
+import signal
+import subprocess
+import sys
+import time
+from pathlib import Path
+
+HERE = Path(__file__).parent
+sys.path.insert(0, str(HERE))
+
+from discovery import discover_cameras
+from tokens import make_token
+
+cam = discover_cameras()[0]
+tok = make_token("ws://localhost:7880", "devkey", "devsecret", "smoke", "smoke-test")
+
+p = subprocess.Popen(
+    [str(HERE / ".venv/bin/python"), str(HERE / "run_worker.py"),
+     "--camera-json", json.dumps({
+         "index": 0, "identity": "smoke-test",
+         "video_device": cam.video_device, "audio_card": cam.audio_card,
+         "usb_port": cam.usb_port}),
+     "--room", "smoke", "--url", "ws://localhost:7880", "--token", tok,
+     "--width", "640", "--height", "480", "--fps", "30",
+     "--audio-rate", "16000", "--enhance-mode", "off"],
+    stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True, bufsize=1,
+)
+t0 = time.time()
+lines = []
+while time.time() - t0 < 20:
+    line = p.stdout.readline()
+    if line:
+        lines.append(line.rstrip())
+        print(line.rstrip(), flush=True)
+p.send_signal(signal.SIGTERM)
+try:
+    rc = p.wait(timeout=15)
+except subprocess.TimeoutExpired:
+    p.kill()
+    rc = "killed"
+print(f"--- smoke test done: rc={rc}")
+print("published markers:", [l for l in lines if "published" in l or "status" in l or "UP" in l])