Had a few hours of \u00a0‘fun’ getting OpenCV3 to build… I will expand on that sometime, meantime some reminders<\/p>\n
Some reminders mainly to me…<\/p>\n
The main problem was configure for OpenCV would not find ffmpeg, in spite of all the solutions to the problem posted around the web, none worked. In the end I reinstalled OpenCV from source.<\/p>\n
Note below the configure needs some specific flags or open CV will get grumpy.<\/p>\n
opencv<\/strong><\/p>\n or ffmpeg<\/strong><\/p>\n ffmpeg build required<\/p>\n You may find ffmpeg complains when it is run of missing libraries, its the usual solution apt-get….<\/p>\n OpenCV<\/strong> #contours returns more values so… ps for the java libs it doesnt find thing unless<\/p>\n export JAVA_HOME=\/usr\/local\/jdk1.8.0_20<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Had a few hours of \u00a0‘fun’ getting OpenCV3 to build… I will expand on that sometime, meantime some reminders Some reminders mainly to me… The main problem was configure for OpenCV would not find ffmpeg, in spite of all the … Continue reading \r\nclear build folder with rm -r\r\n\r\n\r\n#before doing the\r\n\r\ncmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=\/usr\/local<\/pre>\r\n<pre><\/pre>\n
\ncmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=\/usr\/local -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D OPENCV_EXTRA_MODULES_PATH=~\/opencv_contrib\/modules -D BUILD_EXAMPLES=ON ..<\/p>\n\r\n\r\n.\/configure --enable-nonfree --enable-pic --enable-shared\r\n\r\n<\/pre>\n
\nA couple of functions I use from older version has different args, for thos a quick fix os<\/p>\n
\n(_,contours,_) = cv2.findContours(
\n#or
\ncontours, hierarchy = cv2.findContours(…)[-2:]
\n[\/sourcecode ]<\/p>\n