Results 1 to 8 of 8

Thread: Does OpenCV through Yast come with FFMPEG support?

  1. #1

    Default Does OpenCV through Yast come with FFMPEG support?

    The title is pretty self-explanatory

    I'm trying to make a capture from a file in OpenCV, but I keep getting NULL pointers. My guess is that opencv is not configured to use ffmpeg, when installed through Yast, but I don't know how to check this.

    (I have tried building ffmpeg and opencv myself, that was a 2 day traumatic experience, to say the least)

  2. #2

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    No OpenCV users here?

  3. #3
    Join Date
    Mar 2008
    Location
    Phuket, Thailand
    Posts
    26,565
    Blog Entries
    38

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    Quote Originally Posted by Boondock_Saint View Post
    No OpenCV users here?
    ok, ... I'll bite. What has openCV got to do with ffmpeg ? To my knowledge, openCV does not come with openSUSE, although it is on packman.

    Some links:
    Packman's openCV: PackMan :: opencv
    openCV wiki: OpenCV - Wikipedia, the free encyclopedia

    You could contact the packman packager if you believe there is an openCV feature missing in the Packman packaged version.

  4. #4
    Join Date
    Jun 2008
    Location
    Germany
    Posts
    301

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    Hi,

    OpenCV is available via the build service but of course without ffmpeg support. You have to install ffmpeg (e.g. via packman) and compile openCV yourself if you want to have ffmpeg support.

    Hope this helps

  5. #5

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    Quote Originally Posted by oldcpu View Post
    ok, ... I'll bite. What has openCV got to do with ffmpeg ? To my knowledge, openCV does not come with openSUSE, although it is on packman.
    You need ffmpeg to do video I/O in openCV

    Quote Originally Posted by Monex View Post
    Hi,

    OpenCV is available via the build service but of course without ffmpeg support. You have to install ffmpeg (e.g. via packman) and compile openCV yourself if you want to have ffmpeg support.

    Hope this helps
    Yes, that's what I've been afraid of. I've been trying to build openCV with ffmpeg support for 3 days now.

    First I have to hack the configure.in script to let it detect the ffmpeg libs, together with the appropriate include flags.
    Then I have to hack the Makefile.am to change install-hook into install-exec-hook.
    The libtool they generate complains about:

    /bin/sh ../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I../.. -I. -I../../cxcore/include -I../.. -DNDEBUG -I/usr/include/ffmpeg/ -Wall -fno-rtti -pipe -O3 -fomit-frame-pointer -fno-strict-aliasing -MT dummy.lo -MD -MP -MF .deps/dummy.Tpo -c -o dummy.lo dummy.cpp
    ../../libtool: line 813: X--tag=CXX: command not found
    So I copy my own from /usr/bin and that actually gets the compilation going! However, then it complains about hardcode properties:

    libtool: link: ( cd ".libs" && rm -f "lib_cv.la" && ln -s "../lib_cv.la" "lib_cv.la" )
    /bin/sh ../../libtool --tag=CXX --mode=link g++ -Wall -fno-rtti -pipe -O3 -fomit-frame-pointer -fno-strict-aliasing -no-undefined -version-info 1:0:0 -L/home/jvlek/ffmpeg/lib -L/home/jvlek/ffmpeg/lib -o libcv.la -rpath /home/jvlek/opencv/lib dummy.lo lib_cv.la ../../cxcore/src/libcxcore.la -lpthread -ldl -lm -lavcodec -lavformat
    libtool: link: unsupported hardcode properties
    libtool: link: See the libtool documentation for more information.
    libtool: link: Fatal configuration error.
    I've looked into libtool and there are some hardcode config options, but I have no idea what to do with them.


    Building the latest TESTED svn snapshot, with CMake, yields compilation errors. These are not overcome by adding '#define __STDC_CONSTANT_MACROS' as mentioned elsewhere.


    So I've also tried to post the above to the openCV mailinglist, but the owner has to approve and I don't know if he still has to look at my message (sent it yesterday afternoon), or that he rejected it...

  6. #6

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    I tried to compile version 1.0. The autotools errors were easily fixable, but then I found that it uses "img_convert()"... a function available only in versions of ffmpeg previous to 2008.

    Since I'm not motivated to patch it I will wait for 1.1 final.

  7. #7

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    Well, I changed my mind. OpenCV 1.0 is available for openSUSE 11.1 at home:RedDwarf:multimedia with this configuration:
    Code:
    General configuration ================================================
     Compiler: g++
     CXXFLAGS: -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -fno-strict-aliasing
    
     Install path: /usr
    
    HighGUI configuration ================================================
    
     Windowing system --------------
     Use Carbon / Mac OS X: no
     Use gtk+ 2.x: yes
     Use gthread: yes
    
     Image I/O ---------------------
     Use libjpeg: yes
     Use zlib: yes
     Use libpng: yes
     Use libtiff: yes
     Use libjasper: yes
     Use libIlmImf: yes
    
     Video I/O ---------------------
     Use QuickTime / Mac OS X: no
     Use xine: yes
     Use ffmpeg: yes
     Use dc1394 & raw1394: yes
     Use v4l: yes
     Use v4l2: yes
    
    Wrappers for other languages =========================================
     SWIG 
     Python yes
    
    Additional build settings ============================================
     Build demo apps yes
    Isn't the best package that could be, and don't expect me to mantain it, but it should work.

  8. #8
    Leshiy_uk NNTP User

    Default Re: Does OpenCV through Yast come with FFMPEG support?

    I am having similar problem compiling opencv on x86-64. It uses by default its own libtool, with which I had no luck at all. So I resorted to using libtool from /isr/bin.

    Now I am getting the:

    libtool: link: unsupported hardcode properties
    libtool: link: See the libtool documentation for more information.
    libtool: link: Fatal configuration error.

    I don't really know how to resolve this one. You said you resolved it, how did you do it?

    Alex

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •