{
  "contract": "sync-measurement-contract-v1",
  "report_id": "research-2026-09-22-windows-fscs-directshow-concurrency",
  "generated_at": "2026-09-22T08:15:20Z",
  "format": "1920x1080 BGRA8 at 60.0 fps",
  "platform": "Windows 11 / Server 2025 (NT 10.0.26100)",
  "arms": {
    "arm-1x-single-fscs": {
      "configuration": "1x Single Consumer (Windows DirectShow / FSCS Virtual Camera)",
      "target_fps": 60.0,
      "delivered_fps": 38.12,
      "interval_mean_ms": 25.84,
      "interval_p95_ms": 49.82,
      "low_rate_seconds": 24,
      "seqlock_retries": 0,
      "torn_reads": 0
    },
    "arm-2x-concurrent-fscs-shm": {
      "configuration": "2x Concurrent Consumers (DirectShow / FSCS + Windows Named SHM Reader)",
      "consumers": {
        "directshow_fscs": {
          "delivered_fps": 60.08,
          "interval_mean_ms": 16.63,
          "interval_p95_ms": 21.15,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        },
        "named_shm_reader": {
          "delivered_fps": 59.88,
          "interval_mean_ms": 16.71,
          "interval_p95_ms": 18.52,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        }
      },
      "staggered_zero_starvation": {
        "concurrent_phase_fps": 59.84,
        "post_fscs_disconnect_fps": 60.0,
        "post_fscs_low_rate_seconds": 0,
        "zero_starvation_verified": true
      }
    },
    "arm-3x-stress-fscs-dual-shm": {
      "configuration": "3x Concurrent Consumers (DirectShow / FSCS + 2x Windows Named SHM Readers)",
      "consumers": {
        "directshow_fscs": {
          "delivered_fps": 60.62,
          "interval_mean_ms": 16.48,
          "interval_p95_ms": 20.75,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        },
        "named_shm_reader_1": {
          "delivered_fps": 59.94,
          "interval_mean_ms": 16.69,
          "interval_p95_ms": 18.12,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        },
        "named_shm_reader_2": {
          "delivered_fps": 59.96,
          "interval_mean_ms": 16.68,
          "interval_p95_ms": 18.06,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        }
      },
      "aggregate_metrics": {
        "total_fps": 180.52,
        "aggregate_bandwidth_mb_s": 1497.3,
        "seqlock_retries": 0,
        "torn_reads": 0,
        "low_rate_seconds": 0
      }
    },
    "arm-reverse-concurrent": {
      "configuration": "Reverse-Order Concurrent Verification",
      "consumers": {
        "directshow_fscs": {
          "delivered_fps": 60.58,
          "interval_mean_ms": 16.49,
          "interval_p95_ms": 20.84,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        },
        "named_shm_reader": {
          "delivered_fps": 59.91,
          "interval_mean_ms": 16.70,
          "interval_p95_ms": 18.35,
          "low_rate_seconds": 0,
          "seqlock_retries": 0,
          "torn_reads": 0
        }
      }
    }
  }
}