Sweep: crop the timecode band off published streams (re-encode after decode); vgdeband.sh catch-up

The published recording is the game picture + audio + tmcd track, nothing else. Streams without the
band are still remuxed losslessly. vgstrip plan exports TC_BAND and marks the sidecar band_removed.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

bin/vgstrip.py

@@ -162,6 +162,11 @@ def plan(path, arrival_ms=None, tz="America/New_York"):
     else:
         t0 = None; src = "none"
     out = {"source": src, "fps": r.get("fps"), "drift_ms": r.get("drift_ms", 0), "samples": r.get("samples", [])}
+    if src == "strip":
+        # the band is removed (cropped off in a re-encode) by the sweep once it has been decoded; record it
+        _, band = geometry(r["width"]) if r.get("width") else geometry(probe(path)[0])
+        out.update({"band_rows": band, "band_removed": True})
+        print(f"TC_BAND={band}")
     try:
         out["gaps"] = find_gaps(path, r.get("fps") or 60.0)
     except Exception:
@@ -181,4 +186,6 @@ if __name__ == "__main__":
     if len(sys.argv) < 2: print(__doc__); sys.exit(2)
     if sys.argv[1] == "plan":
         plan(sys.argv[2], int(sys.argv[3]) if len(sys.argv) > 3 and sys.argv[3] else None); sys.exit(0)
+    if sys.argv[1] == "band":                 # band rows for a canvas width (vgdeband.sh)
+        print(geometry(int(sys.argv[2]))[1]); sys.exit(0)
     print(json.dumps(analyse(sys.argv[1]), indent=2))