OpenCV Getting Started-Ubuntu 12.04 installation OpenCV
Originally intended to install OpenCV 3.0 on Ubuntu 12.04, the results of the following (2) in the error, do not know how to solve, so the end is to honestly install OPENCV 2.4.
(1) An error occurred at compile time:
In file included from/home/vonzhou/downloads/opencv-3.0.0-rc1/modules/videoio/src/cap_ffmpeg_impl.hpp:65:0,
FROM/HOME/VONZHOU/DOWNLOADS/OPENCV-3.0.0-RC1/MODULES/VIDEOIO/SRC/CAP_FFMPEG.CPP:45:
/home/vonzhou/downloads/opencv-3.0.0-rc1/modules/videoio/src/ffmpeg_codecs.hpp:171:7: Error:' av_codec_id_h263i ' is not declared in this scope
/home/vonzhou/downloads/opencv-3.0.0-rc1/modules/videoio/src/ffmpeg_codecs.hpp:287:7: Error: ' AV_CODEC_ID_WNV1 ' Was wasn't declared in this scope
MAKE[2]: * * * [MODULES/VIDEOIO/CMAKEFILES/OPENCV_VIDEOIO.DIR/SRC/CAP_FFMPEG.CPP.O] Error 1
FIX: The problem is ffmpeg, manually download and install (see here)
./configure--enable-shared--disable-static
Make
sudo make install
Then re-make our OpenCV.
(2) Error:
libopencv_videoio.so.3.0.0:undefined reference to "Avcodec_free_frame"
libopencv_videoio.so.3.0.0:undefined reference to ' Avcodec_encode_video2 '
To install the OPENCV 2.4.10 process:
(1) Install the necessary software;
(2) Download OpenCV and unzip;
(3) make, wait quietly;
Error occurred:
/home/vonzhou/downloads/opencv-2.4.10/modules/core/src/system.cpp:in function ' (Static initializers for/home/ Vonzhou/downloads/opencv-2.4.10/modules/core/src/system.cpp) ':
/home/vonzhou/downloads/opencv-2.4.10/modules/core/src/system.cpp:280:10:error:inconsistent operand constraints in an ' ASM '
[22%] Building CXX Object MODULES/CORE/CMAKEFILES/OPENCV_CORE.DIR/SRC/OPENGL_INTEROP_DEPRECATED.CPP.O
MAKE[2]: * * * [MODULES/CORE/CMAKEFILES/OPENCV_CORE.DIR/SRC/SYSTEM.CPP.O] Error 1
Resolution: This is a compiler-related issue, upgrade GCC or not resolved, you can replace the System.cpp file (see here).
(4) sudo make install
(5) configuration: sudo vi/etc/ld.so.conf.d/opencv.conf, adding content:
/usr/local/lib
Then: sudo ldconfig
(6) The installation is successful, and after rebooting, test it with your own sample code:
CD downloads/opencv-2.4.10/samples/c
./build_all.sh
Then run the Human Face test program:./facedetect
Running result: Your face will be identified and processed,:)
Reference:
Http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html
Upgrade GCC to 4.8 http://ubuntuhandbook.org/index.php/2013/08/install-gcc-4-8-via-ppa-in-ubuntu-12-04-13-04/http://www.samontab.com/web/2014/06/installing-opencv-2-4-9-in-ubuntu-14-04-lts/
OpenCV Getting Started-Ubuntu 12.04 installation OpenCV
