feat: point the fleet at wss LiveKit room uwh-telhai

Publish and subscribe over wss://livekit.uni-wh.de:7800 and refuse cleartext ws://. Conference room is uwh-telhai. Includes the uncommitted encoded H.264 publish path, Rally hairpin, and KMS wall overlay.
2026-10-11 00:48:50 +00:00
parent ef9573c294
commit 95bb7c50ee
89 changed files with 9883 additions and 243 deletions
@@ -0,0 +1,63 @@
+"""Pin Logitech C920 exposure so 360p stays 30 fps.
+
+Aperture-priority + exposure_dynamic_framerate=1 lets the sensor sit at
+~66 ms / gain 255 and drop to 15 fps. Manual 333 (0.1 ms units = 1/30 s)
+with dyn-fps off holds the gst 30 fps request.
+"""
+from __future__ import annotations
+
+import logging
+import os
+import subprocess
+
+log = logging.getLogger("cameras.uvc-exposure")
+
+# UVC: 1 = Manual Mode, 3 = Aperture Priority. Time unit is 0.1 ms.
+AUTO_EXPOSURE_MANUAL = 1
+EXPOSURE_TIME_30FPS = 333
+
+
+def pin_cmd(
+    device: str,
+    *,
+    auto_exposure: int = AUTO_EXPOSURE_MANUAL,
+    exposure_time: int = EXPOSURE_TIME_30FPS,
+    dynamic_framerate: int = 0,
+) -> list[str]:
+    cmd = [
+        "v4l2-ctl",
+        "-d",
+        str(device),
+        f"--set-ctrl=auto_exposure={int(auto_exposure)}",
+        f"--set-ctrl=exposure_dynamic_framerate={int(dynamic_framerate)}",
+    ]
+    # Time is inactive under aperture-priority (3); setting it fails the whole pin.
+    if int(auto_exposure) == AUTO_EXPOSURE_MANUAL:
+        cmd.insert(4, f"--set-ctrl=exposure_time_absolute={int(exposure_time)}")
+    return cmd
+
+
+def pin_from_env() -> tuple[int, int, int]:
+    ae = int(os.environ.get("VIDEO_AUTO_EXPOSURE", str(AUTO_EXPOSURE_MANUAL)))
+    exp = int(os.environ.get("VIDEO_EXPOSURE_TIME", str(EXPOSURE_TIME_30FPS)))
+    dyn = int(os.environ.get("VIDEO_EXPOSURE_DYNAMIC", "0"))
+    return ae, exp, dyn
+
+
+def pin_c920_exposure(device: str) -> None:
+    ae, exp, dyn = pin_from_env()
+    cmd = pin_cmd(device, auto_exposure=ae, exposure_time=exp, dynamic_framerate=dyn)
+    try:
+        r = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+    except OSError as exc:
+        log.warning("pin %s failed: %s", device, exc)
+        return
+    if r.returncode:
+        log.warning("pin %s rc=%s %s", device, r.returncode, (r.stderr or "").strip())
+        return
+    log.info("pinned %s ae=%s time=%s dynfps=%s", device, ae, exp, dyn)
+
+
+def pin_devices(devices: list[str]) -> None:
+    for dev in devices:
+        pin_c920_exposure(dev)