去除视频水印涉及技术实现和法律风险，需谨慎处理。以下为技术实现思路及代码示例（仅供学习参考）：

```python

import cv2

import numpy as np

def remove_watermark(frame, watermark_pos, watermark_size):

水印位置参数（需根据实际水印位置调整）

x, y = watermark_pos

w, h = watermark_size

 图像处理：中值滤波去除静态水印kernel = np.ones((3,3), np.uint8)
frame[y:y+h, x:x+w] = cv2.medianBlur(frame[y:y+h, x:x+w], 5)
return frame

def remove_watermark_from_video(input_path, output_path):

读取视频

cap = cv2.VideoCapture(input_path)

 获取视频参数width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = int(cap.get(cv2.CAP_PROP_FPS))
初始化视频写入
fourcc = cv2.VideoWriter_fourcc('mp4v')
out = cv2.VideoWriter(output_path, fourcc, fps, (width, height))
水印参数（需实际测试确定）
watermark_pos = (100, 100)   水印左上角坐标
watermark_size = (200, 50)    水印宽高
while cap.isOpened():
ret, frame = cap.read()
if not ret:
break
应用去水印处理
processed_frame = remove_watermark(frame, watermark_pos, watermark_size)
写入视频
out.write(processed_frame)
cap.release()
out.release()