{"id":1018032,"date":"2024-12-27T12:37:08","date_gmt":"2024-12-27T04:37:08","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1018032.html"},"modified":"2024-12-27T12:37:11","modified_gmt":"2024-12-27T04:37:11","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8python%e5%a4%84%e7%90%86%e8%a7%86%e9%a2%91","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1018032.html","title":{"rendered":"\u5982\u4f55\u4f7f\u7528python\u5904\u7406\u89c6\u9891"},"content":{"rendered":"

\"\u5982\u4f55\u4f7f\u7528python\u5904\u7406\u89c6\u9891\"<\/p>\n

\u4f7f\u7528Python\u5904\u7406\u89c6\u9891\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u53ef\u4ee5\u901a\u8fc7OpenCV\u8fdb\u884c\u89c6\u9891\u8bfb\u53d6\u4e0e\u5904\u7406\u3001\u4f7f\u7528MoviePy\u8fdb\u884c\u89c6\u9891\u7f16\u8f91\u3001\u5229\u7528FFmpeg\u8fdb\u884c\u683c\u5f0f\u8f6c\u6362\u4e0e\u538b\u7f29<\/strong>\u3002\u8fd9\u4e9b\u5e93\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u529f\u80fd\u652f\u6301\u89c6\u9891\u7684\u5404\u79cd\u5904\u7406\u9700\u6c42\uff0c\u5982\u526a\u8f91\u3001\u5408\u5e76\u3001\u6ee4\u955c\u5e94\u7528\u7b49\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u8fdb\u884c\u89c6\u9891\u5904\u7406\u3002<\/p>\n<\/p>\n

\u4ee5OpenCV\u4e3a\u4f8b\uff0c\u5b83\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u8ba1\u7b97\u673a\u89c6\u89c9\u5e93\uff0c\u80fd\u591f\u5b9e\u73b0\u89c6\u9891\u7684\u8bfb\u53d6\u3001\u9010\u5e27\u5904\u7406\u548c\u5199\u5165\u64cd\u4f5c<\/strong>\u3002\u901a\u8fc7OpenCV\uff0c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u5bf9\u89c6\u9891\u7684\u57fa\u672c\u64cd\u4f5c\uff0c\u5982\u8bfb\u53d6\u89c6\u9891\u5e27\u3001\u5bf9\u6bcf\u5e27\u8fdb\u884c\u56fe\u50cf\u5904\u7406\uff08\u5982\u7070\u5ea6\u8f6c\u6362\u3001\u6ee4\u6ce2\u7b49\uff09\uff0c\u7136\u540e\u91cd\u65b0\u4fdd\u5b58\u4e3a\u65b0\u7684\u89c6\u9891\u6587\u4ef6\u3002\u5177\u4f53\u4f7f\u7528\u65b9\u6cd5\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n<\/p>\n

\u9996\u5148\uff0c\u9700\u8981\u5b89\u88c5OpenCV\u5e93\uff0c\u53ef\u4ee5\u901a\u8fc7pip\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n

pip install opencv-python<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e00\u3001\u4f7f\u7528OpenCV\u8fdb\u884c\u89c6\u9891\u5904\u7406<\/h3>\n<\/p>\n
1. \u89c6\u9891\u7684\u8bfb\u53d6\u4e0e\u663e\u793a<\/strong><\/p>\n<\/p>\n
OpenCV\u63d0\u4f9b\u4e86VideoCapture\u7c7b\u7528\u4e8e\u8bfb\u53d6\u89c6\u9891\u6587\u4ef6\u6216\u6444\u50cf\u5934\u6355\u83b7\u3002\u4f7f\u7528VideoCapture\u5bf9\u8c61\uff0c\u53ef\u4ee5\u9010\u5e27\u8bfb\u53d6\u89c6\u9891\u5e76\u8fdb\u884c\u5904\u7406\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u8bfb\u53d6\u548c\u663e\u793a\u89c6\u9891\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
\u521b\u5efaVideoCapture\u5bf9\u8c61<\/strong><\/h2>\n
cap = cv2.VideoCapture('video.mp4')<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    # \u663e\u793a\u6bcf\u4e00\u5e27<\/p>\n
    cv2.imshow('Frame', frame)<\/p>\n
    # \u6309\u4e0b 'q' \u952e\u9000\u51fa<\/p>\n
    if cv2.wAI<\/a>tKey(1) & 0xFF == ord('q'):<\/p>\n
        break<\/p>\n
cap.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cVideoCapture\u5bf9\u8c61\u7528\u4e8e\u6253\u5f00\u89c6\u9891\u6587\u4ef6video.mp4<\/code>\uff0c\u7136\u540e\u901a\u8fc7\u4e00\u4e2a\u5faa\u73af\u9010\u5e27\u8bfb\u53d6\u89c6\u9891\u3002cv2.imshow()<\/code>\u51fd\u6570\u7528\u4e8e\u663e\u793a\u6bcf\u4e00\u5e27\uff0c\u6309\u4e0b'q'\u952e\u53ef\u4ee5\u9000\u51fa\u64ad\u653e\u3002<\/p>\n<\/p>\n
2. \u89c6\u9891\u7684\u5904\u7406\u4e0e\u4fdd\u5b58<\/strong><\/p>\n<\/p>\n
\u9664\u4e86\u8bfb\u53d6\u548c\u663e\u793a\u89c6\u9891\uff0cOpenCV\u8fd8\u53ef\u4ee5\u5bf9\u89c6\u9891\u8fdb\u884c\u5404\u79cd\u5904\u7406\uff0c\u7136\u540e\u4fdd\u5b58\u6210\u65b0\u7684\u89c6\u9891\u6587\u4ef6\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c06\u8bfb\u53d6\u89c6\u9891\uff0c\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a\u7070\u5ea6\u89c6\u9891\u540e\u4fdd\u5b58\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
\u6253\u5f00\u89c6\u9891\u6587\u4ef6<\/strong><\/h2>\n
cap = cv2.VideoCapture('video.mp4')<\/p>\n
\u83b7\u53d6\u89c6\u9891\u7684\u5e27\u7387\u548c\u5c3a\u5bf8<\/strong><\/h2>\n
fps = cap.get(cv2.CAP_PROP_FPS)<\/p>\n
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))<\/p>\n
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))<\/p>\n
\u5b9a\u4e49VideoWriter\u5bf9\u8c61<\/strong><\/h2>\n
fourcc = cv2.VideoWriter_fourcc(*'XVID')<\/p>\n
out = cv2.VideoWriter('output.avi', fourcc, fps, (width, height), isColor=False)<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    # \u5c06\u5e27\u8f6c\u6362\u4e3a\u7070\u5ea6\u56fe\u50cf<\/p>\n
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)<\/p>\n
    # \u5199\u5165\u5230\u8f93\u51fa\u6587\u4ef6<\/p>\n
    out.write(gray)<\/p>\n
cap.release()<\/p>\n
out.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528VideoWriter\u5bf9\u8c61\u4fdd\u5b58\u5904\u7406\u540e\u7684\u89c6\u9891\u3002cv2.VideoWriter_fourcc(*'XVID')<\/code>\u5b9a\u4e49\u4e86\u89c6\u9891\u7f16\u7801\u683c\u5f0f\uff0cisColor=False<\/code>\u8868\u793a\u8f93\u51fa\u7684\u662f\u7070\u5ea6\u89c6\u9891\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528MoviePy\u8fdb\u884c\u89c6\u9891\u7f16\u8f91<\/h3>\n<\/p>\n
MoviePy\u662f\u4e00\u4e2a\u7528\u4e8e\u89c6\u9891\u7f16\u8f91\u7684Python\u5e93\uff0c\u652f\u6301\u89c6\u9891\u526a\u8f91\u3001\u5408\u6210\u3001\u7279\u6548\u7b49\u591a\u79cd\u529f\u80fd\u3002\u5b83\u63d0\u4f9b\u4e86\u7b80\u5355\u6613\u7528\u7684API\uff0c\u53ef\u4ee5\u8fdb\u884c\u9ad8\u7ea7\u7684\u89c6\u9891\u7f16\u8f91\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
1. \u89c6\u9891\u526a\u8f91\u4e0e\u5408\u5e76<\/strong><\/p>\n<\/p>\n
MoviePy\u7684VideoFileClip\u7c7b\u53ef\u7528\u4e8e\u89c6\u9891\u7684\u526a\u8f91\u548c\u5408\u5e76\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u526a\u8f91\u89c6\u9891\u7684\u7279\u5b9a\u7247\u6bb5\u5e76\u5408\u5e76\u591a\u4e2a\u7247\u6bb5\uff1a<\/p>\n<\/p>\n
from moviepy.editor import VideoFileClip, concatenate_videoclips<\/p>\n
\u6253\u5f00\u89c6\u9891\u6587\u4ef6<\/strong><\/h2>\n
clip1 = VideoFileClip("video1.mp4").subclip(0, 10)  # \u622a\u53d60\u523010\u79d2<\/p>\n
clip2 = VideoFileClip("video2.mp4").subclip(5, 15)  # \u622a\u53d65\u523015\u79d2<\/p>\n
\u5408\u5e76\u526a\u8f91<\/strong><\/h2>\n
final_clip = concatenate_videoclips([clip1, clip2])<\/p>\n
\u4fdd\u5b58\u8f93\u51fa\u6587\u4ef6<\/strong><\/h2>\n
final_clip.write_videofile("output.mp4", codec="libx264")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0csubclip()<\/code>\u65b9\u6cd5\u7528\u4e8e\u622a\u53d6\u89c6\u9891\u7247\u6bb5\uff0cconcatenate_videoclips()<\/code>\u7528\u4e8e\u5408\u5e76\u591a\u4e2a\u89c6\u9891\u7247\u6bb5\u3002\u6700\u7ec8\u7684\u89c6\u9891\u53ef\u4ee5\u4f7f\u7528write_videofile()<\/code>\u4fdd\u5b58\u3002<\/p>\n<\/p>\n
2. \u6dfb\u52a0\u7279\u6548\u4e0e\u5b57\u5e55<\/strong><\/p>\n<\/p>\n
MoviePy\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5728\u89c6\u9891\u4e2d\u6dfb\u52a0\u7279\u6548\u548c\u5b57\u5e55\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
from moviepy.editor import VideoFileClip, TextClip, CompositeVideoClip<\/p>\n
\u6253\u5f00\u89c6\u9891\u6587\u4ef6<\/strong><\/h2>\n
clip = VideoFileClip("video.mp4")<\/p>\n
\u521b\u5efa\u5b57\u5e55<\/strong><\/h2>\n
txt_clip = TextClip("Hello World!", fontsize=70, color='white')<\/p>\n
txt_clip = txt_clip.set_pos('center').set_duration(10)<\/p>\n
\u5408\u6210\u89c6\u9891<\/strong><\/h2>\n
video = CompositeVideoClip([clip, txt_clip])<\/p>\n
\u4fdd\u5b58\u8f93\u51fa\u6587\u4ef6<\/strong><\/h2>\n
video.write_videofile("output_with_text.mp4", codec="libx264")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cTextClip()<\/code>\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u6587\u672c\u7247\u6bb5\uff0cCompositeVideoClip()<\/code>\u7528\u4e8e\u5c06\u6587\u672c\u53e0\u52a0\u5230\u89c6\u9891\u4e0a\u3002set_pos()<\/code>\u548cset_duration()<\/code>\u5206\u522b\u7528\u4e8e\u8bbe\u7f6e\u6587\u672c\u7684\u4f4d\u7f6e\u548c\u6301\u7eed\u65f6\u95f4\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528FFmpeg\u8fdb\u884c\u89c6\u9891\u683c\u5f0f\u8f6c\u6362\u4e0e\u538b\u7f29<\/h3>\n<\/p>\n
FFmpeg\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u591a\u5a92\u4f53\u5904\u7406\u5de5\u5177\uff0c\u53ef\u4ee5\u901a\u8fc7Python\u8c03\u7528\u5b83\u8fdb\u884c\u89c6\u9891\u683c\u5f0f\u7684\u8f6c\u6362\u4e0e\u538b\u7f29\u3002<\/p>\n<\/p>\n
1. \u89c6\u9891\u683c\u5f0f\u8f6c\u6362<\/strong><\/p>\n<\/p>\n
\u53ef\u4ee5\u4f7f\u7528Python\u7684subprocess<\/code>\u6a21\u5757\u8c03\u7528FFmpeg\u547d\u4ee4\u8fdb\u884c\u89c6\u9891\u683c\u5f0f\u7684\u8f6c\u6362\uff1a<\/p>\n<\/p>\n
import subprocess<\/p>\n
\u8f6c\u6362\u89c6\u9891\u683c\u5f0f\u4e3aMP4<\/strong><\/h2>\n
subprocess.run([<\/p>\n
    'ffmpeg', '-i', 'input.avi', 'output.mp4'<\/p>\n
])<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u547d\u4ee4\u5c06AVI\u683c\u5f0f\u7684\u89c6\u9891\u8f6c\u6362\u4e3aMP4\u683c\u5f0f\u3002FFmpeg\u652f\u6301\u591a\u79cd\u683c\u5f0f\u7684\u8f6c\u6362\uff0c\u5177\u4f53\u547d\u4ee4\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u4fee\u6539\u3002<\/p>\n<\/p>\n
2. \u89c6\u9891\u538b\u7f29<\/strong><\/p>\n<\/p>\n
FFmpeg\u4e5f\u53ef\u4ee5\u7528\u4e8e\u538b\u7f29\u89c6\u9891\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import subprocess<\/p>\n
\u538b\u7f29\u89c6\u9891<\/strong><\/h2>\n
subprocess.run([<\/p>\n
    'ffmpeg', '-i', 'input.mp4', '-vcodec', 'libx264', '-crf', '23', 'output_compressed.mp4'<\/p>\n
])<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u547d\u4ee4\u4e2d\uff0c-vcodec libx264<\/code>\u6307\u5b9a\u4e86\u89c6\u9891\u7f16\u7801\u5668\uff0c-crf<\/code>\u53c2\u6570\u7528\u4e8e\u63a7\u5236\u538b\u7f29\u8d28\u91cf\uff0c\u503c\u8d8a\u5c0f\u8d28\u91cf\u8d8a\u9ad8\uff0c\u901a\u5e38\u572818\u523028\u4e4b\u95f4\u9009\u62e9\u3002<\/p>\n<\/p>\n
\u56db\u3001\u7ed3\u5408\u5176\u4ed6Python\u5e93\u8fdb\u884c\u9ad8\u7ea7\u5904\u7406<\/h3>\n<\/p>\n
\u9664\u4e86\u4e0a\u8ff0\u5e93\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u7ed3\u5408\u5176\u4ed6Python\u5e93\u8fdb\u884c\u66f4\u9ad8\u7ea7\u7684\u89c6\u9891\u5904\u7406\u3002\u4f8b\u5982\uff0c\u4f7f\u7528NumPy\u8fdb\u884c\u590d\u6742\u7684\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\uff0c\u6216\u8005\u7ed3\u5408Scikit-learn\u8fdb\u884c\u89c6\u9891\u4e2d\u7684\u7269\u4f53\u68c0\u6d4b\u4e0e\u8bc6\u522b\u3002<\/p>\n<\/p>\n
1. \u4f7f\u7528NumPy\u8fdb\u884c\u89c6\u9891\u5e27\u5904\u7406<\/strong><\/p>\n<\/p>\n
NumPy\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u7ec4\u8ba1\u7b97\u5e93\uff0c\u53ef\u4ee5\u7528\u4e8e\u5bf9\u89c6\u9891\u5e27\u8fdb\u884c\u590d\u6742\u7684\u6570\u503c\u8fd0\u7b97\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5229\u7528NumPy\u5bf9\u89c6\u9891\u5e27\u8fdb\u884c\u81ea\u5b9a\u4e49\u7684\u6ee4\u6ce2\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
import numpy as np<\/p>\n
\u6253\u5f00\u89c6\u9891\u6587\u4ef6<\/strong><\/h2>\n
cap = cv2.VideoCapture('video.mp4')<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    # \u4f7f\u7528NumPy\u8fdb\u884c\u81ea\u5b9a\u4e49\u6ee4\u6ce2<\/p>\n
    kernel = np.array([[-1, -1, -1],<\/p>\n
                       [-1,  9, -1],<\/p>\n
                       [-1, -1, -1]])<\/p>\n
    filtered_frame = cv2.filter2D(frame, -1, kernel)<\/p>\n
    # \u663e\u793a\u5904\u7406\u540e\u7684\u5e27<\/p>\n
    cv2.imshow('Filtered Frame', filtered_frame)<\/p>\n
    if cv2.waitKey(1) & 0xFF == ord('q'):<\/p>\n
        break<\/p>\n
cap.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u4f7f\u7528\u4e86\u81ea\u5b9a\u4e49\u7684\u5377\u79ef\u6838\u5bf9\u6bcf\u4e00\u5e27\u8fdb\u884c\u56fe\u50cf\u9510\u5316\u5904\u7406\u3002<\/p>\n<\/p>\n
2. \u7ed3\u5408\u673a\u5668\u5b66\u4e60<\/a>\u8fdb\u884c\u89c6\u9891\u5206\u6790<\/strong><\/p>\n<\/p>\n
\u901a\u8fc7Scikit-learn\u7b49\u673a\u5668\u5b66\u4e60\u5e93\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u89c6\u9891\u4e2d\u76ee\u6807\u7684\u68c0\u6d4b\u4e0e\u8bc6\u522b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u9884\u8bad\u7ec3\u7684\u6a21\u578b\u5bf9\u89c6\u9891\u4e2d\u7684\u4eba\u8138\u8fdb\u884c\u68c0\u6d4b\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
\u52a0\u8f7d\u9884\u8bad\u7ec3\u7684\u4eba\u8138\u68c0\u6d4b\u6a21\u578b<\/strong><\/h2>\n
face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')<\/p>\n
cap = cv2.VideoCapture('video.mp4')<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    # \u5c06\u5e27\u8f6c\u6362\u4e3a\u7070\u5ea6\u56fe\u50cf<\/p>\n
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)<\/p>\n
    # \u68c0\u6d4b\u4eba\u8138<\/p>\n
    faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5, minSize=(30, 30))<\/p>\n
    # \u7ed8\u5236\u77e9\u5f62\u6846\u5728\u68c0\u6d4b\u5230\u7684\u4eba\u8138\u4e0a<\/p>\n
    for (x, y, w, h) in faces:<\/p>\n
        cv2.rectangle(frame, (x, y), (x+w, y+h), (255, 0, 0), 2)<\/p>\n
    # \u663e\u793a\u68c0\u6d4b\u7ed3\u679c<\/p>\n
    cv2.imshow('Face Detection', frame)<\/p>\n
    if cv2.waitKey(1) & 0xFF == ord('q'):<\/p>\n
        break<\/p>\n
cap.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u4f7f\u7528\u4e86OpenCV\u7684Haar\u7ea7\u8054\u5206\u7c7b\u5668\u8fdb\u884c\u4eba\u8138\u68c0\u6d4b\u3002\u901a\u8fc7\u5bf9\u89c6\u9891\u5e27\u7684\u9010\u5e27\u68c0\u6d4b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u89c6\u9891\u4e2d\u7684\u4eba\u8138\u8fdb\u884c\u5b9e\u65f6\u68c0\u6d4b\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u81ea\u52a8\u5316\u89c6\u9891\u5904\u7406\u5de5\u4f5c\u6d41<\/h3>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5bf9\u5927\u91cf\u89c6\u9891\u8fdb\u884c\u6279\u91cf\u5904\u7406\u3002\u53ef\u4ee5\u7f16\u5199Python\u811a\u672c\u5b9e\u73b0\u81ea\u52a8\u5316\u7684\u89c6\u9891\u5904\u7406\u5de5\u4f5c\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<\/p>\n
1. \u6279\u91cf\u5904\u7406\u89c6\u9891<\/strong><\/p>\n<\/p>\n
\u5047\u8bbe\u6709\u4e00\u4e2a\u76ee\u5f55\u4e0b\u5b58\u50a8\u4e86\u591a\u4e2a\u89c6\u9891\u6587\u4ef6\uff0c\u53ef\u4ee5\u7f16\u5199\u811a\u672c\u5bf9\u8fd9\u4e9b\u89c6\u9891\u8fdb\u884c\u6279\u91cf\u8f6c\u6362\u6216\u5904\u7406\uff1a<\/p>\n<\/p>\n
import os<\/p>\n
import cv2<\/p>\n
\u6307\u5b9a\u89c6\u9891\u6587\u4ef6\u5939\u8def\u5f84<\/strong><\/h2>\n
video_folder = 'videos\/'<\/p>\n
output_folder = 'processed_videos\/'<\/p>\n
\u521b\u5efa\u8f93\u51fa\u6587\u4ef6\u5939<\/strong><\/h2>\n
os.makedirs(output_folder, exist_ok=True)<\/p>\n
for filename in os.listdir(video_folder):<\/p>\n
    if filename.endswith('.mp4'):<\/p>\n
        # \u6253\u5f00\u89c6\u9891\u6587\u4ef6<\/p>\n
        cap = cv2.VideoCapture(os.path.join(video_folder, filename))<\/p>\n
        output_filename = os.path.join(output_folder, filename)<\/p>\n
        # \u83b7\u53d6\u89c6\u9891\u7684\u5e27\u7387\u548c\u5c3a\u5bf8<\/p>\n
        fps = cap.get(cv2.CAP_PROP_FPS)<\/p>\n
        width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))<\/p>\n
        height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))<\/p>\n
        # \u5b9a\u4e49VideoWriter\u5bf9\u8c61<\/p>\n
        fourcc = cv2.VideoWriter_fourcc(*'XVID')<\/p>\n
        out = cv2.VideoWriter(output_filename, fourcc, fps, (width, height), isColor=False)<\/p>\n
        while cap.isOpened():<\/p>\n
            ret, frame = cap.read()<\/p>\n
            if not ret:<\/p>\n
                break<\/p>\n
            # \u5c06\u5e27\u8f6c\u6362\u4e3a\u7070\u5ea6\u56fe\u50cf<\/p>\n
            gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)<\/p>\n
            # \u5199\u5165\u5230\u8f93\u51fa\u6587\u4ef6<\/p>\n
            out.write(gray)<\/p>\n
        cap.release()<\/p>\n
        out.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u811a\u672c\u904d\u5386\u6307\u5b9a\u76ee\u5f55\u4e0b\u7684\u6240\u6709MP4\u6587\u4ef6\uff0c\u5c06\u6bcf\u4e2a\u89c6\u9891\u8f6c\u6362\u4e3a\u7070\u5ea6\u89c6\u9891\u5e76\u4fdd\u5b58\u5230\u8f93\u51fa\u76ee\u5f55\u4e2d\u3002<\/p>\n<\/p>\n
2. \u96c6\u6210\u5230\u66f4\u5927\u7684\u7cfb\u7edf\u4e2d<\/strong><\/p>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u89c6\u9891\u5904\u7406\u53ef\u80fd\u53ea\u662f\u66f4\u5927\u7cfb\u7edf\u7684\u4e00\u90e8\u5206\u3002\u53ef\u4ee5\u4f7f\u7528Python\u5c06\u89c6\u9891\u5904\u7406\u6a21\u5757\u96c6\u6210\u5230\u6570\u636e\u5206\u6790\u3001\u673a\u5668\u5b66\u4e60\u6216Web\u5e94\u7528\u7a0b\u5e8f\u4e2d\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u901a\u8fc7Flask\u6216Django\u642d\u5efa\u4e00\u4e2aWeb\u5e94\u7528\uff0c\u5141\u8bb8\u7528\u6237\u4e0a\u4f20\u89c6\u9891\u5e76\u5728\u7ebf\u5904\u7406\u3002<\/p>\n<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0cPython\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5de5\u5177\u548c\u5e93\u6765\u652f\u6301\u89c6\u9891\u5904\u7406\u7684\u5404\u4e2a\u65b9\u9762\uff0c\u4ece\u57fa\u672c\u7684\u89c6\u9891\u8bfb\u53d6\u3001\u5904\u7406\u4e0e\u4fdd\u5b58\uff0c\u5230\u9ad8\u7ea7\u7684\u89c6\u9891\u7f16\u8f91\u3001\u7279\u6548\u6dfb\u52a0\u4e0e\u81ea\u52a8\u5316\u5de5\u4f5c\u6d41\u3002\u901a\u8fc7\u7ed3\u5408\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\uff0c\u53ef\u4ee5\u5b9e\u73b0\u590d\u6742\u7684\u89c6\u9891\u5904\u7406\u4efb\u52a1\uff0c\u5e76\u5c06\u5176\u5e94\u7528\u4e8e\u591a\u79cd\u5b9e\u9645\u573a\u666f\u4e2d\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u8bfb\u53d6\u89c6\u9891\u6587\u4ef6\uff1f<\/strong>
\u8981\u5728Python\u4e2d\u8bfb\u53d6\u89c6\u9891\u6587\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528OpenCV\u5e93\u3002\u9996\u5148\uff0c\u786e\u4fdd\u5df2\u5b89\u88c5\u8be5\u5e93\uff0c\u53ef\u4ee5\u901a\u8fc7pip install opencv-python<\/code>\u8fdb\u884c\u5b89\u88c5\u3002\u4f7f\u7528cv2.VideoCapture()<\/code>\u51fd\u6570\u6253\u5f00\u89c6\u9891\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7\u5faa\u73af\u9010\u5e27\u8bfb\u53d6\u89c6\u9891\u5185\u5bb9\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
import cv2\n\ncap = cv2.VideoCapture('video.mp4')\nwhile cap.isOpened():\n    ret, frame = cap.read()\n    if not ret:\n        break\n    cv2.imshow('Frame', frame)\n    if cv2.waitKey(1) & 0xFF == ord('q'):\n        break\ncap.release()\ncv2.destroyAllWindows()\n<\/code><\/pre>\n
\u5982\u4f55\u4f7f\u7528Python\u5bf9\u89c6\u9891\u8fdb\u884c\u526a\u8f91\uff1f<\/strong>
Python\u4e2d\u53ef\u4ee5\u4f7f\u7528MoviePy\u5e93\u6765\u8fdb\u884c\u89c6\u9891\u526a\u8f91\u3002\u5b89\u88c5MoviePy\u53ef\u4ee5\u4f7f\u7528pip install moviepy<\/code>\u3002\u901a\u8fc7VideoFileClip<\/code>\u7c7b\u52a0\u8f7d\u89c6\u9891\uff0c\u5e76\u4f7f\u7528subclip<\/code>\u65b9\u6cd5\u9009\u62e9\u8981\u526a\u8f91\u7684\u65f6\u95f4\u6bb5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n
from moviepy.editor import VideoFileClip\n\nclip = VideoFileClip('video.mp4').subclip(10, 20)  # \u526a\u8f91\u7b2c10\u79d2\u523020\u79d2\u7684\u90e8\u5206\nclip.write_videofile('edited_video.mp4')\n<\/code><\/pre>\n
\u5728Python\u4e2d\u5982\u4f55\u63d0\u53d6\u89c6\u9891\u7684\u97f3\u9891\uff1f<\/strong>
\u4f7f\u7528MoviePy\u5e93\u53ef\u4ee5\u8f7b\u677e\u63d0\u53d6\u89c6\u9891\u4e2d\u7684\u97f3\u9891\u3002\u52a0\u8f7d\u89c6\u9891\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7audio<\/code>\u5c5e\u6027\u83b7\u53d6\u97f3\u9891\u90e8\u5206\uff0c\u5e76\u4f7f\u7528write_audiofile<\/code>\u65b9\u6cd5\u5c06\u5176\u4fdd\u5b58\u4e3a\u97f3\u9891\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u63d0\u53d6\u97f3\u9891\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
from moviepy.editor import VideoFileClip\n\nvideo = VideoFileClip('video.mp4')\naudio = video.audio\naudio.write_audiofile('extracted_audio.mp3')\n<\/code><\/pre>\n
\u8fd9\u4e9b\u65b9\u6cd5\u4e3a\u89c6\u9891\u5904\u7406\u63d0\u4f9b\u4e86\u57fa\u7840\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u8fdb\u884c\u66f4\u591a\u64cd\u4f5c\uff0c\u5982\u5408\u5e76\u89c6\u9891\u3001\u6dfb\u52a0\u6c34\u5370\u7b49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4f7f\u7528Python\u5904\u7406\u89c6\u9891\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u53ef\u4ee5\u901a\u8fc7OpenCV\u8fdb\u884c\u89c6\u9891\u8bfb\u53d6\u4e0e\u5904\u7406\u3001\u4f7f\u7528MoviePy\u8fdb\u884c\u89c6\u9891\u7f16\u8f91\u3001 […]","protected":false},"author":3,"featured_media":1018040,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1018032"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1018032"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1018032\/revisions"}],"predecessor-version":[{"id":1018041,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1018032\/revisions\/1018041"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1018040"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1018032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1018032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1018032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}