How to resolve OpenCV 2.3.1 compilation error on Ubuntu 11.10 due to FFmpeg [duplicate]

Question

Possible Duplicate:
compile opencv2.3.1 in ubuntu 11.10

How do you prepare your environment so you can properly compile OpenCV 2.3.1 on Ubuntu 11.10?

I'm following the OpenCV install guide, but it's instructions are frustratingly complex.

However, I've distilled it into the following script:

sudo apt-get install --yes cmake libjpeg62 libjpeg62-dev libtiff4 libtiff4-dev libjasper1 libjasper-dev libpng12-0 libpng12-dev libavformat-dev libswscale-dev openexr zlibc zlib1g zlib1g-dev python2.7-dev libgtk-3-dev gcc g++ libtbb-dev
cd /tmp
wget --output-document=OpenCV-2.3.1a.tar.bz2 http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.3.1/OpenCV-2.3.1a.tar.bz2/download?use_mirror=iweb
tar -xvjf OpenCV-2.3.1a.tar.bz2
cd OpenCV-2.3.1
mkdir release
cd release
time cmake -D WITH_TBB=ON -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON -D BUILD_EXAMPLES=ON ..
time make

Everything runs succesfully, except of course for make which exits with the error:

/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1339:41: error: ‘guess_format’ was not declared in this scope
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1367:31: error: ‘av_alloc_format_context’ was not declared in this scope
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1411:9: warning: ‘int av_set_parameters(AVFormatContext*, AVFormatParameters*)’ is deprecated (declared at /usr/include/libavformat/avformat.h:1363) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1411:35: warning: ‘int av_set_parameters(AVFormatContext*, AVFormatParameters*)’ is deprecated (declared at /usr/include/libavformat/avformat.h:1363) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1415:5: warning: ‘void dump_format(AVFormatContext*, int, const char*, int)’ is deprecated (declared at /usr/include/libavformat/avformat.h:1485) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1415:35: warning: ‘void dump_format(AVFormatContext*, int, const char*, int)’ is deprecated (declared at /usr/include/libavformat/avformat.h:1485) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1442:15: warning: ‘int avcodec_open(AVCodecContext*, AVCodec*)’ is deprecated (declared at /usr/include/libavcodec/avcodec.h:3650) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1442:36: warning: ‘int avcodec_open(AVCodecContext*, AVCodec*)’ is deprecated (declared at /usr/include/libavcodec/avcodec.h:3650) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1479:13: warning: ‘int url_fopen(AVIOContext**, const char*, int)’ is deprecated (declared at /usr/include/libavformat/avio.h:278) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1479:52: warning: ‘int url_fopen(AVIOContext**, const char*, int)’ is deprecated (declared at /usr/include/libavformat/avio.h:278) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1485:5: warning: ‘int av_write_header(AVFormatContext*)’ is deprecated (declared at /usr/include/libavformat/avformat.h:1421) [-Wdeprecated-declarations]
/tmp/OpenCV-2.3.1/modules/highgui/src/cap_ffmpeg_impl.hpp:1485:25: warning: ‘int av_write_header(AVFormatContext*)’ is deprecated (declared at /usr/include/libavformat/avformat.h:1421) [-Wdeprecated-declarations]
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.o] Error 1
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make: *** [all] Error 2

How do I resolve this error?

Answer 1

I think you don't have the good ffmpeg libraries. There is at least two solutions. If you need ffmpeg, try to install it thanks to :

sudo apt-get install libavformat-dev libswscale-dev 

If you don't need to use ffmpeg in your openCV applications, you can try to disable it adding :

WITH_FFMPEG=OFF WITH_GSTREAMER=OFF

to your cmake configuration line.

Cheers,