| import cv2, sys, numpy as np |
|
|
| path = r"E:\test\Kiro_flash_detection\Video\0921 (1)_flash.mp4" |
| cap = cv2.VideoCapture(path) |
| if not cap.isOpened(): |
| print("FAILED to open"); sys.exit(1) |
|
|
| fps = cap.get(cv2.CAP_PROP_FPS) |
| n = cap.get(cv2.CAP_PROP_FRAME_COUNT) |
| w = cap.get(cv2.CAP_PROP_FRAME_WIDTH) |
| h = cap.get(cv2.CAP_PROP_FRAME_HEIGHT) |
| dur = n / fps if fps else 0 |
| print(f"fps={fps} frames={n} size={w}x{h} duration={dur:.2f}s ({dur/60:.2f} min)") |
|
|
| |
| |
| for t in [86.5, 87.0, 87.08, 87.5, 88.0]: |
| cap.set(cv2.CAP_PROP_POS_MSEC, t*1000) |
| ok, frame = cap.read() |
| if not ok: |
| print(f"t={t}: read failed"); continue |
| g = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) |
| print(f"t={t:.2f}s frame~{int(t*fps)}: gray min={g.min()} max={g.max()} mean={g.mean():.1f} bright_px(>200)={int((g>200).sum())}") |
|
|
| cap.release() |
|
|
