警告：0 全局 /home//opencv-4.1.1/modules/videoio/src/cap.cpp
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【中文标题】警告：0 全局 /home//opencv-4.1.1/modules/videoio/src/cap.cpp【英文标题】：WARN:0 global /home//opencv-4.1.1/modules/videoio/src/cap.cpp 【发布时间】：2019-08-31 15:06:12 【问题描述】：系统：
OpenCV =4.1.1
Ubuntu =16.04
python =2.7.12
我的代码：
#!/usr/bin/env python
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
#print(cv2.getBuildInformation())
print('cap.isOpened')
if cap.isOpened():
print ('cap is opened')
while(True):
re,img=cap.read()
cv2.imshow("video output", img)
k = cv2.waitKey(1)& 0xFF
if k==27:
break
cap.release()
cv2.destroyAllWindows()
工作正常，但收到此警告：
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap.cpp (163) open VIDEOIO(GSTREAMER): trying capture cameraNum=0 ...
libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: libjpeg error: End Of Image
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap_gstreamer.cpp (1757) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module v4l2src0 reported: Failed to allocate a buffer
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap_gstreamer.cpp (886) open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap_gstreamer.cpp (480) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap.cpp (183) open VIDEOIO(GSTREAMER): can't create capture
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap.cpp (163) open VIDEOIO(V4L2): trying capture cameraNum=0 ...
[ WARN:0] global /home/redhwan/opencv-4.1.1/modules/videoio/src/cap.cpp (175) open VIDEOIO(V4L2): created, isOpened=1
当我安装 OpenCV 时，我关注了这个https://www.pyimagesearch.com/2016/07/11/compiling-opencv-with-cuda-support/
请帮助我或任何建议
提前谢谢你
【问题讨论】：
【参考方案1】：为我修复，我更改了版本并安装了 OpenCV=3.3.1
【讨论】：
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