python获取视频文件夹下每个视频的总帧数输出，并输出所有视频最后的帧求和

你可以使用OpenCV库读取视频文件并计算总帧数。以下是代码示例：

import cv2
import os

videos_folder = "path/to/videos/folder"
total_frames = 0
last_frame_sum = 0

# Loop through each video in the folder
for filename in os.listdir(videos_folder):
    if filename.endswith(".mp4") or filename.endswith(".avi"):  # Check if it's a video file
        video_path = os.path.join(videos_folder, filename)
        cap = cv2.VideoCapture(video_path)
        total_frames += int(cap.get(cv2.CAP_PROP_FRAME_COUNT))  # Get total frames and add to sum
        while cap.isOpened():
            ret, frame = cap.read()
            if not ret:
                last_frame_sum += cap.get(cv2.CAP_PROP_POS_FRAMES) - 1  # Get last frame and add to sum
                break
        cap.release()

print("Total frames:", total_frames)
print("Last frame sum:", last_frame_sum)

请注意，此代码仅适用于MP4和AVI格式的视频文件。如果你的视频文件格式不同，你需要相应地更改代码。