Delete test_camera_fps.py
Browse files- test_camera_fps.py +0 -85
test_camera_fps.py
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import cv2
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import time
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import sys
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def test_camera(device_id, width=640, height=480, fps=30):
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print(f"\n=== Testing Camera Index {device_id} ===")
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# 优先使用 V4L2 后端
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backend = cv2.CAP_V4L2 if hasattr(cv2, 'CAP_V4L2') else cv2.CAP_ANY
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backend_name = "V4L2" if backend == cv2.CAP_V4L2 else "ANY"
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print(f"Opening with backend: {backend_name}")
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cap = cv2.VideoCapture(device_id, backend)
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if not cap.isOpened():
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print(f"Error: Could not open camera {device_id}")
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return
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# 1. 强制 MJPG
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print("Attempting to set MJPG format...")
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cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'))
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# 2. 设置 FPS 和 分辨率
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cap.set(cv2.CAP_PROP_FPS, fps)
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cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
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cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
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# 3. 关闭自动曝光 (Linux V4L2 特有,尝试通过 OpenCV 属性设置)
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# 0.25 通常对应 'Manual',但在不同驱动下可能不同,这里仅作为尝试
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# cap.set(cv2.CAP_PROP_AUTO_EXPOSURE, 0.25)
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# 4. 读取实际生效的设置
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actual_w = cap.get(cv2.CAP_PROP_FRAME_WIDTH)
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actual_h = cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
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actual_fps = cap.get(cv2.CAP_PROP_FPS)
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fourcc = int(cap.get(cv2.CAP_PROP_FOURCC))
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codec = "".join([chr((fourcc >> 8 * i) & 0xFF) for i in range(4)])
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print(f"----------------------------------------")
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print(f"Requested: {width}x{height} @ {fps} FPS, MJPG")
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print(f"Actual : {actual_w}x{actual_h} @ {actual_fps} FPS, Codec: {codec}")
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print(f"----------------------------------------")
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if codec.upper() != "MJPG":
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print("WARNING: Codec is NOT MJPG! This is likely the cause of low FPS.")
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print("Warming up camera (skip 10 frames)...")
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for _ in range(10):
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cap.read()
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print(f"Starting capture loop for 100 frames...")
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count = 0
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start_time = time.time()
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while count < 100:
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ret, frame = cap.read()
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if not ret:
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print("Error: Failed to read frame during loop")
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break
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count += 1
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# 显示简略进度
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if count % 10 == 0:
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sys.stdout.write(f"{count}..")
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sys.stdout.flush()
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end_time = time.time()
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duration = end_time - start_time
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avg_fps = count / duration
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print(f"\n\nRESULT: Captured {count} frames in {duration:.2f} seconds.")
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print(f"AVERAGE FPS: {avg_fps:.2f}")
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cap.release()
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if __name__ == "__main__":
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if len(sys.argv) < 2:
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print("Usage: python test_camera_fps.py <device_id> [width] [height] [fps]")
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print("Example: python backend/scripts/test_camera_fps.py 0 640 480 30")
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else:
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dev_id = int(sys.argv[1])
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w = int(sys.argv[2]) if len(sys.argv) > 2 else 640
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h = int(sys.argv[3]) if len(sys.argv) > 3 else 480
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f = int(sys.argv[4]) if len(sys.argv) > 4 else 30
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test_camera(dev_id, w, h, f)
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