opencv裁剪视频区域

import cv2

打开视频文件

video_path = 'input.mp4'

cap = cv2.VideoCapture(video_path)

获取视频的帧率、宽度和高度

fps = int(cap.get(cv2.CAP_PROP_FPS))

width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))

height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))

定义裁剪区域 (x, y, w, h)

x, y, w, h = 100, 100, 400, 300 # 你可以根据需要调整这些值

创建视频写入对象

output_path = 'output.mp4'

fourcc = cv2.VideoWriter_fourcc(*'mp4v') # 编码器

out = cv2.VideoWriter(output_path, fourcc, fps, (w, h))

while cap.isOpened():

ret, frame = cap.read()

if not ret:

break

裁剪帧

cropped_frame = framey:y+h, x:x+w

写入裁剪后的帧到输出视频

out.write(cropped_frame)

显示裁剪后的帧（可选）

cv2.imshow('Cropped Frame', cropped_frame)

if cv2.waitKey(1) & 0xFF == ord('q'):

break

释放资源

cap.release()

out.release()

cv2.destroyAllWindows()

print(f"裁剪后的视频已保存到 {output_path}")

裁剪用opencv比较方便，因为opencv可视化 比较方便 ，