“找不到起始号码(以文件名)"尝试从opencv中的hevc(h265)视频读取帧时 [英] "Can't find starting number (in the name of file)" when trying to read frames from hevc (h265) video in opencv

问题描述

我正在尝试从opencv-python(python3，最新版本)的hevc(h265) .avi视频中读取帧，但是不断抛出

I'm trying to read frames from a hevc(h265) .avi video in opencv-python (python3, latest version) but keeps throwing

OpenCV(4.1.1)C:\ projects \ opencv-python \ opencv \ modules \ videoio \ src \ cap_images.cpp:253: 错误:(-5:错误的参数)CAP_IMAGES:找不到起始编号(在 文件名):C:\ Users \ gabri \ Desktop \ 2019-11-22_13 \ a.avi在 函数'cv :: icvExtractPattern'.

OpenCV(4.1.1) C:\projects\opencv-python\opencv\modules\videoio\src\cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): C:\Users\gabri\Desktop\2019-11-22_13\a.avi in function 'cv::icvExtractPattern'.

我已经在ubuntu和windows 10中使用opencv-python, opencv-contrib-python and opencv-contrib-python-nonfree进行了尝试，但是没有用. 预先谢谢你.

I've tried both in ubuntu and windows 10 using opencv-python, opencv-contrib-python and opencv-contrib-python-nonfree, but it didn't work. Thank you in advance.

用于读取视频的代码:

import cv2
import imutils

cap = cv2.VideoCapture("C:\\Users\\gabri\\Desktop\\2019-11-22_13\\a.avi")


while True:
    ret,frame = cap.read()
    if not ret:
        break
    frame = imutils.resize(frame,width = 960)
    cv2.imshow('image',frame)

    k = cv2.waitKey(1) & 0xff

    if k == 27:
       break

推荐答案

我遇到了同样的问题，编译和链接正常，但是在运行时发生了相同的隐秘错误.

I had the same problem, compilation and linking ok, but the same cryptic error occurs at running.

(在Windows中)当无法访问opencv_videoio_ffmpeg430_64.dll时发生(它似乎被另一个opencv库静默调用).您可能没有使用-DWITH_FFMPEG=ON构建opencv，或者您的dll不在路径中.

It happened (with Windows) when opencv_videoio_ffmpeg430_64.dll was not accessible (it seems to be silently called by another opencv lib). Either you did not build opencv with the -DWITH_FFMPEG=ON, or alternatively your dll is not in the path.

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