fix(probe): bound long UVC capture

Cargo.lock

@@ -1658,7 +1658,7 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "lesavka_client"
-version = "0.27.10"
+version = "0.27.11"
 dependencies = [
  "anyhow",
  "async-stream",
@@ -1692,7 +1692,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_common"
-version = "0.27.10"
+version = "0.27.11"
 dependencies = [
  "anyhow",
  "base64",
@@ -1704,7 +1704,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_server"
-version = "0.27.10"
+version = "0.27.11"
 dependencies = [
  "anyhow",
  "base64",

client/Cargo.toml

@@ -4,7 +4,7 @@ path                    = "src/main.rs"
 
 [package]
 name                    = "lesavka_client"
-version                 = "0.27.10"
+version                 = "0.27.11"
 edition                 = "2024"
 
 [dependencies]

common/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name                    = "lesavka_common"
-version                 = "0.27.10"
+version                 = "0.27.11"
 edition                 = "2024"
 build                   = "build.rs"
 

docs/architecture-and-media-readiness.md

@@ -326,6 +326,11 @@ probe terminate with evidence even when malformed packets produce no decoded
 timestamps. This is a hardware-testable correction; marked Tethys capture is
 still required before declaring the tear/smear class fixed.
 
+Release 0.27.11 extends the same wall-clock guarantee to the long-running real
+webcam artifact detector. A malformed stream now yields a bounded report with
+`capture_timed_out`, FFmpeg diagnostics, and extracted reference/suspicious
+frames instead of blocking the soak indefinitely.
+
 ## 7. The Resolved Downstream Video Failure
 
 The current blank downstream feeds fail before transport or decoding.
@@ -402,7 +407,7 @@ The safe completion sequence for this incident is:
 6. Run `scripts/install/server.sh` as the trusted deployment path. Preserve the
    already-attached USB gadget unless a controlled rebuild is explicitly
    required.
-7. Confirm Theia reports server version `0.27.10`, the pushed release revision,
+7. Confirm Theia reports server version `0.27.11`, the pushed release revision,
    direct MJPEG normalizer timeout `0`, and a coherent UVC contract.
 8. Open both downstream RPCs and prove that each emits changing, decodable H.264
    frames.
@@ -420,7 +425,7 @@ hardware contract is repeatable. The remaining work falls into five groups.
 
 ### A. Install And Version Parity
 
-- Push and deploy `0.27.10` through the client/server install scripts.
+- Push and deploy `0.27.11` through the client/server install scripts.
 - Confirm client/server version and revision in every hardware probe artifact.
 - Eliminate the current state where a fixed client talks to an unfixed server.
 
@@ -486,6 +491,6 @@ host repair:
 9. disconnect/reconnect and device changes recover without stale media; and
 10. diagnostics identify the failed physical stage when any item breaks.
 
-Until that sequence passes on the installed `0.27.10` client/server pair, the
+Until that sequence passes on the installed `0.27.11` client/server pair, the
 current release should be described as a validated code correction awaiting
 hardware deployment and end-to-end acceptance, not as a completed product fix.

scripts/manual/run_rct_uvc_artifact_probe.py

@@ -476,6 +476,7 @@ def run_capture(args: argparse.Namespace) -> int:
     analysis_elapsed = 0.0
     raw_capture_bytes = 0
     ffmpeg_rc: int | None = None
+    capture_timed_out = False
     previous: bytes | None = None
     frame_index = 0
     suspicious_count = 0
@@ -569,9 +570,24 @@ def run_capture(args: argparse.Namespace) -> int:
             (artifact_dir / "command.txt").write_text(" ".join(shlex.quote(part) for part in capture_command) + "\n")
             print(f"capturing raw RCT frames before analysis: {raw_path}", file=sys.stderr)
             started = time.monotonic()
-            proc = subprocess.run(capture_command, stdout=subprocess.DEVNULL, stderr=err, check=False)
+            try:
-            capture_elapsed = time.monotonic() - started
+                proc = subprocess.run(
+                    capture_command,
+                    stdout=subprocess.DEVNULL,
+                    stderr=err,
+                    check=False,
+                    timeout=max(5.0, args.duration + 10.0),
+                )
                 ffmpeg_rc = proc.returncode
+            except subprocess.TimeoutExpired:
+                capture_timed_out = True
+                ffmpeg_rc = 124
+                err.write(
+                    f"capture exceeded wall timeout after {args.duration + 10.0:.1f}s\n".encode()
+                )
+                err.flush()
+            capture_elapsed = time.monotonic() - started
+            raw_path.touch(exist_ok=True)
             raw_capture_bytes = raw_path.stat().st_size if raw_path.exists() else 0
             print(
                 f"analyzing captured raw RCT frames bytes={raw_capture_bytes} capture_s={capture_elapsed:.3f}",
@@ -601,6 +617,7 @@ def run_capture(args: argparse.Namespace) -> int:
         "duration_observed_s": round(elapsed, 3),
         "analysis_duration_s": round(analysis_elapsed, 3),
         "ffmpeg_rc": ffmpeg_rc,
+        "capture_timed_out": capture_timed_out,
         "raw_capture_bytes": raw_capture_bytes,
         "frames": frame_index,
         "fps_observed": round(frame_index / elapsed, 3),
@@ -633,6 +650,7 @@ def format_summary(summary: dict[str, Any]) -> str:
         f"device: {summary['device']}",
         f"mode: {summary['width']}x{summary['height']}@{summary['fps_requested']}",
         f"frames: {summary['frames']} ({summary['fps_observed']} fps observed)",
+        f"capture timed out: {summary.get('capture_timed_out', False)}",
         f"suspicious: {summary['suspicious_frames']} ({summary['suspicious_pct']}%)",
         f"static: {summary.get('static_frames', 0)} ({summary.get('static_pct', 0.0)}%)",
         f"max deltas: upper={summary.get('max_upper_delta', 0.0)} lower={summary.get('max_lower_delta', 0.0)}",

server/Cargo.toml

@@ -16,7 +16,7 @@ bench                   = false
 
 [package]
 name                    = "lesavka_server"
-version                 = "0.27.10"
+version                 = "0.27.11"
 edition                 = "2024"
 autobins                = false
 

tests/manual/server/rct/rct_uvc_artifact_probe_manual_contract.rs

@@ -52,6 +52,23 @@ fn rct_uvc_artifact_probe_documents_late_path_lower_half_detection() {
     }
 }
 
+#[test]
+fn rct_uvc_artifact_probe_terminates_when_malformed_video_never_decodes() {
+    for expected in [
+        "timeout=max(5.0, args.duration + 10.0)",
+        "except subprocess.TimeoutExpired:",
+        "capture_timed_out = True",
+        "ffmpeg_rc = 124",
+        "raw_path.touch(exist_ok=True)",
+        "\"capture_timed_out\": capture_timed_out",
+    ] {
+        assert!(
+            PROBE_SRC.contains(expected),
+            "long receiver probe must report instead of hanging when corrupt UVC packets produce no decoded frames: {expected}"
+        );
+    }
+}
+
 #[test]
 fn rct_uvc_artifact_probe_self_test_flags_synthetic_lower_half_slab() {
     let dir = tempfile::tempdir().expect("tempdir");