如何使用 python 和 opencv 从目录中一个接一个地运行完整视频而不跳帧

Question

我正在编写一个脚本，该脚本循环遍历一个包含多个 2mb 视频的目录并读取它们并显示它们。问题是它确实读取了它们，但跳过了帧，对于某些视频，它只是跳过了它们，给出了无法读取帧的错误。当我尝试运行单个视频时，它们工作正常，所以唯一的问题是我是否循环播放它们

我正在尝试最终构建一个脚本，该脚本拍摄视频并将它们作为发布请求发送到服务器，该服务器可以将它们保存在 mongodb 数据库中，但因为我对此不熟悉，所以我只是尝试一次构建它。如果你们能提出任何建议那就太棒了

import os
import cv2 as cv
# import time

def get_video_duration(video_path):
    cap = cv.VideoCapture(video_path)
    fps = cap.get(cv.CAP_PROP_FPS)
    frame_count = int(cap.get(cv.CAP_PROP_FRAME_COUNT))
    duration = frame_count / fps
    cap.release()
    return duration

folder_path = '/Users/api/ramses/video3/'  # Specify the folder containing video files
video_files = [f for f in os.listdir(folder_path) if f.endswith('.mp4')]

for video_file in video_files:
    video_path = os.path.join(folder_path, video_file)
    print("Processing video:", video_path)

    cap = cv.VideoCapture(video_path)

    while cap.isOpened():
        ret, frame = cap.read()
        # If frame is read correctly, ret is True
        if not ret:
            print(f"Can't receive frame from {video_file}. Moving to the next video...")
            break
        gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)
        cv.imshow('frame', gray)
        if cv.waitKey(1) == ord('q'):
            break
    # time.sleep(17)
    cap.release()
    cv.destroyAllWindows()

    

print("Finished displaying all videos.")```

Answer 1

我已经测试了你的代码，它似乎工作正常。

Processing video: C:/Users/david/Downloads/videos\video1.mp4
Can't receive frame from video1.mp4. Moving to the next video...
Processing video: C:/Users/david/Downloads/videos\video2.mp4
Can't receive frame from video2.mp4. Moving to the next video...
Processing video: C:/Users/david/Downloads/videos\video3.mp4
Can't receive frame from video3.mp4. Moving to the next video...
Finished displaying all videos.

您到底得到了什么错误？如果只是

Can't receive frame from video3.mp4. Moving to the next video...

，你确定这不仅仅是视频结束了吗？