{"id":1012426,"date":"2024-12-27T11:38:51","date_gmt":"2024-12-27T03:38:51","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1012426.html"},"modified":"2024-12-27T11:38:53","modified_gmt":"2024-12-27T03:38:53","slug":"python-opencv%e5%a6%82%e4%bd%95%e4%bf%9d%e5%ad%98%e8%a7%86%e9%a2%91","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1012426.html","title":{"rendered":"python opencv\u5982\u4f55\u4fdd\u5b58\u89c6\u9891"},"content":{"rendered":"

\"python<\/p>\n

\u5728Python\u4e2d\u4f7f\u7528OpenCV\u4fdd\u5b58\u89c6\u9891\u7684\u5173\u952e\u6b65\u9aa4\u662f\uff1a\u521b\u5efaVideoCapture\u5bf9\u8c61\u8bfb\u53d6\u89c6\u9891\u5e27\u3001\u521b\u5efaVideoWriter\u5bf9\u8c61\u4fdd\u5b58\u89c6\u9891\u5e27\u3001\u5faa\u73af\u8bfb\u53d6\u548c\u5199\u5165\u5e27\u3001\u91ca\u653e\u8d44\u6e90\u3002<\/strong>\u5176\u4e2d\uff0c\u521b\u5efaVideoWriter\u5bf9\u8c61\u662f\u4e00\u4e2a\u5173\u952e\u6b65\u9aa4\uff0c\u56e0\u4e3a\u5b83\u51b3\u5b9a\u4e86\u8f93\u51fa\u89c6\u9891\u7684\u683c\u5f0f\u3001\u5e27\u7387\u548c\u5206\u8fa8\u7387\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528OpenCV\u4fdd\u5b58\u89c6\u9891\uff0c\u5e76\u4e14\u4f1a\u63d0\u4f9b\u4e00\u4e9b\u4ee3\u7801\u793a\u4f8b\u548c\u5efa\u8bae\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b89\u88c5\u548c\u5bfc\u5165OpenCV<\/p>\n<\/p>\n

\u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u786e\u4fdd\u4f60\u7684Python\u73af\u5883\u4e2d\u5df2\u7ecf\u5b89\u88c5\u4e86OpenCV\u5e93\u3002\u5982\u679c\u6ca1\u6709\u5b89\u88c5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n

pip install opencv-python<\/p>\n
pip install opencv-python-headless<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u5728Python\u811a\u672c\u4e2d\u5bfc\u5165OpenCV\u5e93\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u521b\u5efaVideoCapture\u5bf9\u8c61\u8bfb\u53d6\u89c6\u9891\u5e27<\/p>\n<\/p>\n
VideoCapture\u5bf9\u8c61\u7528\u4e8e\u4ece\u6444\u50cf\u5934\u6216\u89c6\u9891\u6587\u4ef6\u4e2d\u6355\u83b7\u89c6\u9891\u5e27\u3002<\/strong>\u5982\u679c\u4f60\u60f3\u4ece\u6444\u50cf\u5934\u6355\u83b7\u89c6\u9891\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
cap = cv2.VideoCapture(0)  # 0\u8868\u793a\u7b2c\u4e00\u4e2a\u6444\u50cf\u5934<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5982\u679c\u8981\u4ece\u89c6\u9891\u6587\u4ef6\u8bfb\u53d6\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n<\/p>\n
cap = cv2.VideoCapture('input_video.mp4')  # 'input_video.mp4'\u662f\u89c6\u9891\u6587\u4ef6\u7684\u8def\u5f84<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u521b\u5efaVideoWriter\u5bf9\u8c61\u4fdd\u5b58\u89c6\u9891\u5e27<\/p>\n<\/p>\n
VideoWriter\u5bf9\u8c61\u7528\u4e8e\u5c06\u6355\u83b7\u7684\u5e27\u4fdd\u5b58\u4e3a\u89c6\u9891\u6587\u4ef6\u3002<\/strong>\u521b\u5efaVideoWriter\u5bf9\u8c61\u65f6\uff0c\u9700\u8981\u6307\u5b9a\u4e00\u4e9b\u53c2\u6570\uff1a\u8f93\u51fa\u6587\u4ef6\u540d\u3001\u7f16\u7801\u5668\u3001\u5e27\u7387\u548c\u5206\u8fa8\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u521b\u5efaVideoWriter\u5bf9\u8c61\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
fourcc = cv2.VideoWriter_fourcc(*'XVID')  # \u4f7f\u7528XVID\u7f16\u7801\u5668<\/p>\n
out = cv2.VideoWriter('output_video.avi', fourcc, 20.0, (640, 480))<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c'output_video.avi'<\/code>\u662f\u8f93\u51fa\u89c6\u9891\u7684\u6587\u4ef6\u540d\uff0cfourcc<\/code>\u662f\u7f16\u7801\u5668\uff0c20.0<\/code>\u662f\u5e27\u7387\uff0c(640, 480)<\/code>\u662f\u89c6\u9891\u7684\u5206\u8fa8\u7387\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5faa\u73af\u8bfb\u53d6\u548c\u5199\u5165\u5e27<\/p>\n<\/p>\n
\u521b\u5efa\u597dVideoCapture\u548cVideoWriter\u5bf9\u8c61\u540e\uff0c\u53ef\u4ee5\u5f00\u59cb\u4ece\u8f93\u5165\u6e90\u8bfb\u53d6\u5e27\u5e76\u5c06\u5176\u5199\u5165\u8f93\u51fa\u6587\u4ef6\u3002\u901a\u5e38\u4f7f\u7528\u4e00\u4e2a\u5faa\u73af\u6765\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()  # \u8bfb\u53d6\u4e00\u5e27<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    out.write(frame)  # \u5199\u5165\u5e27\u5230\u8f93\u51fa\u6587\u4ef6<\/p>\n
    cv2.imshow('Frame', frame)  # \u663e\u793a\u5e27<\/p>\n
    if cv2.wAI<\/a>tKey(1) & 0xFF == ord('q'):<\/p>\n
        break<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u5faa\u73af\u4e2d\uff0ccap.read()<\/code>\u8bfb\u53d6\u4e00\u5e27\uff0cout.write(frame)<\/code>\u5c06\u5e27\u5199\u5165\u8f93\u51fa\u6587\u4ef6\uff0ccv2.imshow('Frame', frame)<\/code>\u663e\u793a\u5e27\u3002\u6309\u4e0b'q'\u952e\u53ef\u4ee5\u9000\u51fa\u5faa\u73af\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u91ca\u653e\u8d44\u6e90<\/p>\n<\/p>\n
\u5b8c\u6210\u64cd\u4f5c\u540e\uff0c\u91ca\u653eVideoCapture\u548cVideoWriter\u5bf9\u8c61\uff0c\u5e76\u5173\u95ed\u6240\u6709OpenCV\u7a97\u53e3\uff1a<\/p>\n<\/p>\n
cap.release()<\/p>\n
out.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u9009\u62e9\u5408\u9002\u7684\u7f16\u7801\u5668\u548c\u683c\u5f0f<\/p>\n<\/p>\n
\u9009\u62e9\u5408\u9002\u7684\u7f16\u7801\u5668\u548c\u683c\u5f0f\u5bf9\u4e8e\u89c6\u9891\u7684\u8d28\u91cf\u548c\u6587\u4ef6\u5927\u5c0f\u81f3\u5173\u91cd\u8981\u3002<\/strong>OpenCV\u652f\u6301\u591a\u79cd\u7f16\u7801\u5668\uff0c\u5982MJPG\u3001XVID\u3001H264\u7b49\u3002\u5728\u9009\u62e9\u7f16\u7801\u5668\u65f6\uff0c\u9700\u8981\u8003\u8651\u517c\u5bb9\u6027\u548c\u538b\u7f29\u6548\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7f16\u7801\u5668\u7684\u8bf4\u660e\uff1a<\/p>\n<\/p>\n
    \n
  • XVID<\/strong>\uff1a\u5e7f\u6cdb\u4f7f\u7528\u7684\u5f00\u6e90\u7f16\u7801\u5668\uff0c\u517c\u5bb9\u6027\u597d\uff0c\u9002\u5408\u4fdd\u5b58\u4e3aAVI\u683c\u5f0f\u3002<\/li>\n
  • MJPG<\/strong>\uff1a\u9002\u5408\u4fdd\u5b58\u4e3aAVI\u683c\u5f0f\uff0c\u538b\u7f29\u6548\u7387\u8f83\u4f4e\uff0c\u4f46\u5904\u7406\u901f\u5ea6\u5feb\u3002<\/li>\n
  • H264<\/strong>\uff1a\u538b\u7f29\u6548\u7387\u9ad8\uff0c\u9002\u5408\u4fdd\u5b58\u4e3aMP4\u683c\u5f0f\uff0c\u4f46\u9700\u8981\u5b89\u88c5\u989d\u5916\u7684\u7f16\u89e3\u7801\u5668\u3002<\/li>\n<\/ul>\n
    \u4e03\u3001\u8c03\u6574\u89c6\u9891\u5206\u8fa8\u7387\u548c\u5e27\u7387<\/p>\n<\/p>\n
    \u5728\u521b\u5efaVideoWriter\u5bf9\u8c61\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u8f93\u51fa\u89c6\u9891\u7684\u5206\u8fa8\u7387\u548c\u5e27\u7387\u3002\u8c03\u6574\u5206\u8fa8\u7387\u548c\u5e27\u7387\u53ef\u4ee5\u5f71\u54cd\u89c6\u9891\u7684\u64ad\u653e\u901f\u5ea6\u548c\u8d28\u91cf\u3002<\/strong>\u901a\u5e38\uff0c\u5206\u8fa8\u7387\u8d8a\u9ad8\uff0c\u89c6\u9891\u8d28\u91cf\u8d8a\u597d\uff0c\u4f46\u6587\u4ef6\u5927\u5c0f\u4e5f\u8d8a\u5927\u3002\u5e27\u7387\u8d8a\u9ad8\uff0c\u89c6\u9891\u64ad\u653e\u8d8a\u6d41\u7545\uff0c\u4f46\u4e5f\u589e\u52a0\u4e86\u6587\u4ef6\u5927\u5c0f\u3002<\/p>\n<\/p>\n
    \u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u5206\u8fa8\u7387\u8c03\u6574\u4e3a1280×720\uff0c\u5e27\u7387\u8c03\u6574\u4e3a30\uff1a<\/p>\n<\/p>\n
    out = cv2.VideoWriter('output_video.avi', fourcc, 30.0, (1280, 720))<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u516b\u3001\u5904\u7406\u89c6\u9891\u4e2d\u7684\u6bcf\u4e00\u5e27<\/p>\n<\/p>\n
    \u5728\u5199\u5165\u5e27\u4e4b\u524d\uff0c\u53ef\u4ee5\u5bf9\u6bcf\u4e00\u5e27\u8fdb\u884c\u5904\u7406\uff0c\u4f8b\u5982\u6dfb\u52a0\u6c34\u5370\u3001\u8c03\u6574\u4eae\u5ea6\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5c06\u5e27\u8f6c\u6362\u4e3a\u7070\u5ea6\u56fe\u50cf\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
    while cap.isOpened():<\/p>\n
        ret, frame = cap.read()<\/p>\n
        if not ret:<\/p>\n
            break<\/p>\n
        gray_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)  # \u8f6c\u6362\u4e3a\u7070\u5ea6\u56fe\u50cf<\/p>\n
        out.write(gray_frame)<\/p>\n
        cv2.imshow('Frame', gray_frame)<\/p>\n
        if cv2.waitKey(1) & 0xFF == ord('q'):<\/p>\n
            break<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u4e5d\u3001\u603b\u7ed3<\/p>\n<\/p>\n
    \u4fdd\u5b58\u89c6\u9891\u662f\u8ba1\u7b97\u673a\u89c6\u89c9\u5e94\u7528\u4e2d\u7684\u4e00\u4e2a\u57fa\u672c\u4efb\u52a1\u3002\u5728Python\u4e2d\u4f7f\u7528OpenCV\u4fdd\u5b58\u89c6\u9891\uff0c\u6d89\u53ca\u5230\u521b\u5efaVideoCapture\u548cVideoWriter\u5bf9\u8c61\uff0c\u5faa\u73af\u8bfb\u53d6\u548c\u5199\u5165\u5e27\uff0c\u4ee5\u53ca\u91ca\u653e\u8d44\u6e90\u3002\u9009\u62e9\u5408\u9002\u7684\u7f16\u7801\u5668\u3001\u683c\u5f0f\u3001\u5206\u8fa8\u7387\u548c\u5e27\u7387\u53ef\u4ee5\u5f71\u54cd\u89c6\u9891\u7684\u8d28\u91cf\u548c\u6587\u4ef6\u5927\u5c0f\u3002\u6b64\u5916\uff0c\u53ef\u4ee5\u5728\u5199\u5165\u5e27\u4e4b\u524d\u5bf9\u5176\u8fdb\u884c\u5904\u7406\uff0c\u4ee5\u6ee1\u8db3\u7279\u5b9a\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n
    \u901a\u8fc7\u5408\u7406\u7684\u8bbe\u7f6e\u548c\u5904\u7406\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u4fdd\u5b58\u548c\u5904\u7406\u89c6\u9891\uff0c\u4e3a\u540e\u7eed\u7684\u5206\u6790\u548c\u5e94\u7528\u6253\u4e0b\u575a\u5b9e\u7684\u57fa\u7840\u3002\u5e0c\u671b\u672c\u6587\u80fd\u4e3a\u4f60\u5728Python\u4e2d\u4f7f\u7528OpenCV\u4fdd\u5b58\u89c6\u9891\u63d0\u4f9b\u6709\u4ef7\u503c\u7684\u6307\u5bfc\u548c\u5e2e\u52a9\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u4f7f\u7528Python OpenCV\u4fdd\u5b58\u89c6\u9891\uff1f<\/strong>
    \u4f7f\u7528Python OpenCV\u4fdd\u5b58\u89c6\u9891\u901a\u5e38\u9700\u8981\u4f7f\u7528cv2.VideoWriter<\/code>\u7c7b\u3002\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2aVideoWriter\u5bf9\u8c61\uff0c\u6307\u5b9a\u8f93\u51fa\u6587\u4ef6\u540d\u3001\u7f16\u7801\u683c\u5f0f\u3001\u5e27\u7387\u548c\u89c6\u9891\u5c3a\u5bf8\u3002\u4e4b\u540e\uff0c\u901a\u8fc7\u5faa\u73af\u8bfb\u53d6\u6bcf\u4e00\u5e27\u56fe\u50cf\uff0c\u5e76\u4f7f\u7528write()<\/code>\u65b9\u6cd5\u5c06\u6bcf\u4e00\u5e27\u5199\u5165\u89c6\u9891\u6587\u4ef6\u4e2d\u3002\u6700\u540e\uff0c\u522b\u5fd8\u4e86\u91ca\u653eVideoWriter\u5bf9\u8c61\u4ee5\u786e\u4fdd\u6587\u4ef6\u6b63\u786e\u4fdd\u5b58\u3002<\/p>\n
    \u53ef\u4ee5\u4f7f\u7528\u54ea\u4e9b\u7f16\u7801\u683c\u5f0f\u6765\u4fdd\u5b58\u89c6\u9891\uff1f<\/strong>
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    \u5982\u4f55\u8bbe\u7f6e\u4fdd\u5b58\u89c6\u9891\u7684\u5e27\u7387\u548c\u5c3a\u5bf8\uff1f<\/strong>
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