{"id":1184355,"date":"2025-01-15T19:25:31","date_gmt":"2025-01-15T11:25:31","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1184355.html"},"modified":"2025-01-15T19:25:33","modified_gmt":"2025-01-15T11:25:33","slug":"%e5%a6%82%e4%bd%95%e7%94%a8python%e8%bf%9b%e8%a1%8c%e8%a7%86%e9%a2%91%e6%a0%87%e6%b3%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1184355.html","title":{"rendered":"\u5982\u4f55\u7528Python\u8fdb\u884c\u89c6\u9891\u6807\u6ce8"},"content":{"rendered":"

\"\u5982\u4f55\u7528Python\u8fdb\u884c\u89c6\u9891\u6807\u6ce8\"<\/p>\n

\u7528Python\u8fdb\u884c\u89c6\u9891\u6807\u6ce8\u7684\u6700\u4f73\u65b9\u6cd5\u662f\u4f7f\u7528OpenCV\u3001MoviePy\u3001\u4ee5\u53caLabelImg\u7b49\u5de5\u5177\u3002\u8fd9\u4e9b\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u89c6\u9891\u7684\u52a0\u8f7d\u3001\u5904\u7406\u3001\u6807\u6ce8\u548c\u8f93\u51fa\u3002<\/strong> \u5728\u8fd9\u4e9b\u5de5\u5177\u4e2d\uff0cOpenCV\u4e3b\u8981\u7528\u4e8e\u89c6\u9891\u7684\u52a0\u8f7d\u548c\u5904\u7406\uff0cMoviePy\u7528\u4e8e\u89c6\u9891\u7f16\u8f91\u548c\u5904\u7406\uff0c\u800cLabelImg\u5219\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u56fe\u50cf\u6807\u6ce8\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u6807\u6ce8\u6587\u4ef6\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u8fdb\u884c\u89c6\u9891\u6807\u6ce8\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528OpenCV\u8fdb\u884c\u89c6\u9891\u52a0\u8f7d\u548c\u5904\u7406<\/h3>\n<\/p>\n

1.1 \u5b89\u88c5OpenCV<\/h4>\n<\/p>\n

\u8981\u4f7f\u7528OpenCV\u8fdb\u884c\u89c6\u9891\u5904\u7406\uff0c\u9996\u5148\u9700\u8981\u5b89\u88c5OpenCV\u5e93\u3002\u53ef\u4ee5\u4f7f\u7528pip\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n

pip install opencv-python<\/p>\n
<\/code><\/pre>\n<\/p>\n
1.2 \u52a0\u8f7d\u89c6\u9891<\/h4>\n<\/p>\n
\u4f7f\u7528OpenCV\u52a0\u8f7d\u89c6\u9891\u975e\u5e38\u7b80\u5355\uff0c\u53ef\u4ee5\u4f7f\u7528cv2.VideoCapture<\/code>\u51fd\u6570\u6765\u52a0\u8f7d\u89c6\u9891\u6587\u4ef6\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
\u52a0\u8f7d\u89c6\u9891\u6587\u4ef6<\/strong><\/h2>\n
video_path = 'path_to_your_video.mp4'<\/p>\n
cap = cv2.VideoCapture(video_path)<\/p>\n
\u68c0\u67e5\u89c6\u9891\u662f\u5426\u6210\u529f\u52a0\u8f7d<\/strong><\/h2>\n
if not cap.isOpened():<\/p>\n
    print("Error: Could not open video.")<\/p>\n
else:<\/p>\n
    print("Video successfully loaded.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
1.3 \u8bfb\u53d6\u89c6\u9891\u5e27<\/h4>\n<\/p>\n
\u52a0\u8f7d\u89c6\u9891\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528cap.read()<\/code>\u51fd\u6570\u9010\u5e27\u8bfb\u53d6\u89c6\u9891\u5185\u5bb9\uff1a<\/p>\n<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    # \u5728\u6b64\u5904\u5bf9\u6bcf\u4e00\u5e27\u8fdb\u884c\u5904\u7406<\/p>\n
    cv2.imshow('Frame', frame)<\/p>\n
    # \u6309\u952e\u9000\u51fa<\/p>\n
    if cv2.wAI<\/a>tKey(1) & 0xFF == ord('q'):<\/p>\n
        break<\/p>\n
\u91ca\u653e\u89c6\u9891\u5bf9\u8c61<\/strong><\/h2>\n
cap.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528MoviePy\u8fdb\u884c\u89c6\u9891\u7f16\u8f91\u548c\u5904\u7406<\/h3>\n<\/p>\n
2.1 \u5b89\u88c5MoviePy<\/h4>\n<\/p>\n
MoviePy\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u89c6\u9891\u7f16\u8f91\u5e93\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5bf9\u89c6\u9891\u8fdb\u884c\u5404\u79cd\u7f16\u8f91\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528pip\u547d\u4ee4\u5b89\u88c5\uff1a<\/p>\n<\/p>\n
pip install moviepy<\/p>\n
<\/code><\/pre>\n<\/p>\n
2.2 \u52a0\u8f7d\u548c\u5904\u7406\u89c6\u9891<\/h4>\n<\/p>\n
\u4f7f\u7528MoviePy\u52a0\u8f7d\u548c\u5904\u7406\u89c6\u9891\u4e5f\u975e\u5e38\u7b80\u5355\uff1a<\/p>\n<\/p>\n
from moviepy.editor import VideoFileClip<\/p>\n
\u52a0\u8f7d\u89c6\u9891\u6587\u4ef6<\/strong><\/h2>\n
video_path = 'path_to_your_video.mp4'<\/p>\n
clip = VideoFileClip(video_path)<\/p>\n
\u663e\u793a\u89c6\u9891\u4fe1\u606f<\/strong><\/h2>\n
print(f"Duration: {clip.duration} seconds")<\/p>\n
print(f"FPS: {clip.fps}")<\/p>\n
print(f"Resolution: {clip.size}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2.3 \u5bf9\u89c6\u9891\u8fdb\u884c\u64cd\u4f5c<\/h4>\n<\/p>\n
MoviePy\u63d0\u4f9b\u4e86\u8bb8\u591a\u65b9\u4fbf\u7684\u89c6\u9891\u64cd\u4f5c\u51fd\u6570\uff0c\u4f8b\u5982\u88c1\u526a\u3001\u6dfb\u52a0\u6587\u672c\u3001\u5408\u5e76\u7b49\uff1a<\/p>\n<\/p>\n
from moviepy.editor import TextClip, CompositeVideoClip<\/p>\n
\u6dfb\u52a0\u6587\u672c\u5230\u89c6\u9891<\/strong><\/h2>\n
text = TextClip("Hello, MoviePy!", fontsize=70, color='white')<\/p>\n
text = text.set_pos('center').set_duration(5)<\/p>\n
\u5408\u5e76\u6587\u672c\u548c\u89c6\u9891<\/strong><\/h2>\n
result = CompositeVideoClip([clip, text])<\/p>\n
\u4fdd\u5b58\u5904\u7406\u540e\u7684\u89c6\u9891<\/strong><\/h2>\n
result.write_videofile("output_video.mp4", codec='libx264')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528LabelImg\u8fdb\u884c\u56fe\u50cf\u6807\u6ce8<\/h3>\n<\/p>\n
3.1 \u5b89\u88c5LabelImg<\/h4>\n<\/p>\n
LabelImg\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u56fe\u50cf\u6807\u6ce8\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u6807\u6ce8\u6587\u4ef6\u3002\u53ef\u4ee5\u4f7f\u7528pip\u547d\u4ee4\u5b89\u88c5\uff1a<\/p>\n<\/p>\n
pip install labelImg<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.2 \u8fdb\u884c\u6807\u6ce8<\/h4>\n<\/p>\n
\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u884c\u542f\u52a8LabelImg\u8fdb\u884c\u56fe\u50cf\u6807\u6ce8\uff1a<\/p>\n<\/p>\n
labelImg<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728LabelImg\u4e2d\uff0c\u53ef\u4ee5\u6253\u5f00\u89c6\u9891\u7684\u6bcf\u4e00\u5e27\u56fe\u50cf\u8fdb\u884c\u6807\u6ce8\uff0c\u5e76\u5c06\u6807\u6ce8\u7ed3\u679c\u4fdd\u5b58\u4e3aXML\u6216YOLO\u683c\u5f0f\u6587\u4ef6\u3002\u5177\u4f53\u64cd\u4f5c\u53ef\u4ee5\u53c2\u8003LabelImg\u7684\u4f7f\u7528\u6587\u6863\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5c06\u6807\u6ce8\u7ed3\u679c\u5e94\u7528\u5230\u89c6\u9891\u4e2d<\/h3>\n<\/p>\n
4.1 \u8bfb\u53d6\u6807\u6ce8\u6587\u4ef6<\/h4>\n<\/p>\n
\u6839\u636e\u6807\u6ce8\u6587\u4ef6\u683c\u5f0f\uff0c\u53ef\u4ee5\u7f16\u5199\u4ee3\u7801\u8bfb\u53d6\u6807\u6ce8\u7ed3\u679c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f7f\u7528YOLO\u683c\u5f0f\uff0c\u53ef\u4ee5\u8fd9\u6837\u8bfb\u53d6\u6807\u6ce8\u6587\u4ef6\uff1a<\/p>\n<\/p>\n
def read_yolo_label(file_path):<\/p>\n
    labels = []<\/p>\n
    with open(file_path, 'r') as file:<\/p>\n
        lines = file.readlines()<\/p>\n
        for line in lines:<\/p>\n
            labels.append([float(x) for x in line.strip().split()])<\/p>\n
    return labels<\/p>\n
\u793a\u4f8b<\/strong><\/h2>\n
labels = read_yolo_label('path_to_yolo_label.txt')<\/p>\n
print(labels)<\/p>\n
<\/code><\/pre>\n<\/p>\n
4.2 \u5728\u89c6\u9891\u5e27\u4e2d\u7ed8\u5236\u6807\u6ce8<\/h4>\n<\/p>\n
\u8bfb\u53d6\u6807\u6ce8\u7ed3\u679c\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528OpenCV\u5728\u89c6\u9891\u5e27\u4e2d\u7ed8\u5236\u6807\u6ce8\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
\u793a\u4f8b\u6807\u6ce8\u7ed3\u679c<\/strong><\/h2>\n
labels = [<\/p>\n
    [0, 0.5, 0.5, 0.2, 0.2]  # [class_id, center_x, center_y, width, height]<\/p>\n
]<\/p>\n
def draw_labels(frame, labels):<\/p>\n
    height, width, _ = frame.shape<\/p>\n
    for label in labels:<\/p>\n
        class_id, cx, cy, w, h = label<\/p>\n
        left = int((cx - w \/ 2) * width)<\/p>\n
        top = int((cy - h \/ 2) * height)<\/p>\n
        right = int((cx + w \/ 2) * width)<\/p>\n
        bottom = int((cy + h \/ 2) * height)<\/p>\n
        # \u7ed8\u5236\u77e9\u5f62\u6846<\/p>\n
        cv2.rectangle(frame, (left, top), (right, bottom), (0, 255, 0), 2)<\/p>\n
\u52a0\u8f7d\u89c6\u9891\u5e76\u7ed8\u5236\u6807\u6ce8<\/strong><\/h2>\n
cap = cv2.VideoCapture('path_to_your_video.mp4')<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    draw_labels(frame, labels)<\/p>\n
    cv2.imshow('Frame', 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
\u4e94\u3001\u7ed3\u5408\u6240\u6709\u6b65\u9aa4\u5b9e\u73b0\u5b8c\u6574\u89c6\u9891\u6807\u6ce8\u6d41\u7a0b<\/h3>\n<\/p>\n
5.1 \u8bfb\u53d6\u89c6\u9891\u5e27\u5e76\u4fdd\u5b58\u4e3a\u56fe\u50cf\u6587\u4ef6<\/h4>\n<\/p>\n
\u9996\u5148\uff0c\u8bfb\u53d6\u89c6\u9891\u5e27\u5e76\u4fdd\u5b58\u4e3a\u56fe\u50cf\u6587\u4ef6\uff0c\u4ee5\u4fbf\u4f7f\u7528LabelImg\u8fdb\u884c\u6807\u6ce8\uff1a<\/p>\n<\/p>\n
import os<\/p>\n
import cv2<\/p>\n
video_path = 'path_to_your_video.mp4'<\/p>\n
output_dir = 'frames\/'<\/p>\n
if not os.path.exists(output_dir):<\/p>\n
    os.makedirs(output_dir)<\/p>\n
cap = cv2.VideoCapture(video_path)<\/p>\n
frame_count = 0<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    frame_path = os.path.join(output_dir, f'frame_{frame_count:04d}.jpg')<\/p>\n
    cv2.imwrite(frame_path, frame)<\/p>\n
    frame_count += 1<\/p>\n
cap.release()<\/p>\n
<\/code><\/pre>\n<\/p>\n
5.2 \u4f7f\u7528LabelImg\u5bf9\u56fe\u50cf\u8fdb\u884c\u6807\u6ce8<\/h4>\n<\/p>\n
\u542f\u52a8LabelImg\uff0c\u5bf9\u4fdd\u5b58\u7684\u56fe\u50cf\u8fdb\u884c\u6807\u6ce8\uff0c\u5e76\u5c06\u6807\u6ce8\u7ed3\u679c\u4fdd\u5b58\u4e3aYOLO\u683c\u5f0f\u6587\u4ef6\u3002<\/p>\n<\/p>\n
5.3 \u8bfb\u53d6\u6807\u6ce8\u7ed3\u679c\u5e76\u5e94\u7528\u5230\u89c6\u9891\u4e2d<\/h4>\n<\/p>\n
\u8bfb\u53d6\u6807\u6ce8\u7ed3\u679c\uff0c\u5e76\u5728\u539f\u89c6\u9891\u4e2d\u7ed8\u5236\u6807\u6ce8\uff1a<\/p>\n<\/p>\n
import cv2<\/p>\n
def read_yolo_labels(label_dir, frame_count):<\/p>\n
    labels = []<\/p>\n
    for i in range(frame_count):<\/p>\n
        label_path = os.path.join(label_dir, f'frame_{i:04d}.txt')<\/p>\n
        if os.path.exists(label_path):<\/p>\n
            labels.append(read_yolo_label(label_path))<\/p>\n
        else:<\/p>\n
            labels.append([])<\/p>\n
    return labels<\/p>\n
def draw_labels(frame, labels):<\/p>\n
    height, width, _ = frame.shape<\/p>\n
    for label in labels:<\/p>\n
        class_id, cx, cy, w, h = label<\/p>\n
        left = int((cx - w \/ 2) * width)<\/p>\n
        top = int((cy - h \/ 2) * height)<\/p>\n
        right = int((cx + w \/ 2) * width)<\/p>\n
        bottom = int((cy + h \/ 2) * height)<\/p>\n
        cv2.rectangle(frame, (left, top), (right, bottom), (0, 255, 0), 2)<\/p>\n
video_path = 'path_to_your_video.mp4'<\/p>\n
label_dir = 'labels\/'<\/p>\n
output_video = 'output_video.mp4'<\/p>\n
cap = cv2.VideoCapture(video_path)<\/p>\n
frame_width = int(cap.get(3))<\/p>\n
frame_height = int(cap.get(4))<\/p>\n
fps = int(cap.get(5))<\/p>\n
out = cv2.VideoWriter(output_video, cv2.VideoWriter_fourcc(*'mp4v'), fps, (frame_width, frame_height))<\/p>\n
frame_count = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))<\/p>\n
labels = read_yolo_labels(label_dir, frame_count)<\/p>\n
frame_index = 0<\/p>\n
while cap.isOpened():<\/p>\n
    ret, frame = cap.read()<\/p>\n
    if not ret:<\/p>\n
        break<\/p>\n
    draw_labels(frame, labels[frame_index])<\/p>\n
    out.write(frame)<\/p>\n
    frame_index += 1<\/p>\n
cap.release()<\/p>\n
out.release()<\/p>\n
cv2.destroyAllWindows()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4ece\u89c6\u9891\u5e27\u63d0\u53d6\u3001\u56fe\u50cf\u6807\u6ce8\u5230\u6807\u6ce8\u7ed3\u679c\u5e94\u7528\u7684\u5b8c\u6574\u6d41\u7a0b\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528Python\u5bf9\u89c6\u9891\u8fdb\u884c\u6807\u6ce8\uff0c\u5e76\u751f\u6210\u5e26\u6709\u6807\u6ce8\u7684\u8f93\u51fa\u89c6\u9891\u3002<\/p>\n<\/p>\n
\u516d\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528Python\u8fdb\u884c\u89c6\u9891\u6807\u6ce8\u7684\u5b8c\u6574\u6d41\u7a0b\u3002\u9996\u5148\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528OpenCV\u52a0\u8f7d\u548c\u5904\u7406\u89c6\u9891\uff0c\u7136\u540e\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528MoviePy\u8fdb\u884c\u89c6\u9891\u7f16\u8f91\u548c\u5904\u7406\u3002\u63a5\u7740\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528LabelImg\u8fdb\u884c\u56fe\u50cf\u6807\u6ce8\uff0c\u6700\u540e\u5c06\u6807\u6ce8\u7ed3\u679c\u5e94\u7528\u5230\u89c6\u9891\u4e2d\uff0c\u5e76\u751f\u6210\u5e26\u6709\u6807\u6ce8\u7684\u8f93\u51fa\u89c6\u9891\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5bf9\u89c6\u9891\u8fdb\u884c\u6807\u6ce8\u548c\u5904\u7406\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u89c6\u9891\u5206\u6790\u548c\u8ba1\u7b97\u673a\u89c6\u89c9\u5e94\u7528\u573a\u666f\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff0c\u80fd\u591f\u8ba9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528Python\u8fdb\u884c\u89c6\u9891\u6807\u6ce8\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u4f7f\u7528Python\u8fdb\u884c\u89c6\u9891\u6807\u6ce8\uff1f<\/strong>
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