我在ubuntu 17.04 中使用 opencv 320 ，只是尝试计算java中给定视频的总帧数。这是我的代码。
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Failed to query video capabilities: Inappropriate ioctl for device
libv4l2: error getting capabilities: Inappropriate ioctl for device
VIDEOIO ERROR: V4L: device /home/aritra/workspace/oopencv/horror.mp4: Unable to query number of channels
could not open this file
我已将视频文件保留在项目中。每当我运行这个程序时，它都显示消息
Video I/O:
-- DC1394 1.x: NO
-- DC1394 2.x: NO
-- FFMPEG: YES
-- avcodec: YES (ver 57.64.101)
-- avformat: YES (ver 57.56.101)
-- avutil: YES (ver 55.34.101)
-- swscale: YES (ver 4.2.100)
-- avresample: YES (ver 3.1.0)
-- GStreamer: NO
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- OpenNI2: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- Aravis SDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: Using libv4l1 (ver 1.12.3) / libv4l2 (ver 1.12.3)
-- XIMEA: NO
-- Xine: NO
-- gPhoto2: NO
但我的视频I / O状态是
curl -D- -u Username:Password -X POST -H "Content-Type: application/json" --data "{\"jql\":\"project = GB and issueType = Risk\"}" "site/rest/api/2/search"
我已根据OpenCV Constants.CaptureProperty检查https://github.com/opencv/opencv/issues/6157并使 WITH_LIBV4L = ON 但仍然收到这些消息。我该怎么办？任何人都可以帮助我吗？