i am using netbeans and in the libraries tab there is a linker command where i am adding the libs i stated in the thread before. Netbeans is catching the libs (giving them a lib icon otherwise it would've given them a "blank" icon) but I am always getting the "undefined reference to <functionName>" (when using ffmpeg functions). I would really appreciate it if someone can write a really really really small tutorial that shows how to build ur first ffmpeg program (using the latest ffmpeg) and run it. That would help a lot of people other than me for a lot of people are having this problem and some others after updating ffmpeg.
On Thu, Sep 29, 2011 at 1:39 AM, jan hölscher <[email protected]>wrote: > before we can discuss further, please provide the complete command line to > the linker and error from it. > > > > 2011/9/29 mounir younes <[email protected]> > >> Yes I did that ! But still having the problem after building. >> >> >> On Wed, Sep 28, 2011 at 7:53 PM, jan hölscher <[email protected] >> > wrote: >> >>> did you surround your libav header includes with : >>> >>> #ifdef __cplusplus >>> extern "C" { >>> #endif >>> #include <libavformat/avformat.h> >>> #include <libavcodec/avcodec.h> >>> #include <libavcodec/opt.h> >>> #include <libavutil/avutil.h> >>> #include <libswscale/swscale.h> >>> #include <libavutil/fifo.h> >>> #include <libavutil/rational.h> >>> #ifdef __cplusplus >>> } >>> #endif >>> >>> >>> 2011/9/28 mounir younes <[email protected]> >>> >>>> I gave the names without the linker prefix. I keep getting the >>>> "undefined reference to" error and cannot solve it. >>>> >>>> On Sat, Sep 24, 2011 at 10:43 PM, Alex Cohn >>>> <[email protected]>wrote: >>>> >>>>> In your list of libs, "-l" is obviously doubled. Try to give the names >>>>> to the linker without the prefix. >>>>> On Sep 24, 2011 7:58 AM, "mounir younes" <[email protected]> >>>>> wrote: >>>>> > Hello, I am new to ffmpeg and I am getting compiling errors while >>>>> compiling >>>>> > c++ code with ffmpeg libraries. It seems that a lot of people are >>>>> getting >>>>> > this with the new ffmpeg but I couldn't find a solution that I could >>>>> > understand. >>>>> > >>>>> > I found a link that says that this >>>>> > >>>>> > CXXFLAGS=-D__STDC_CONSTANT_MACROS ./configure >>>>> > (http://code.google.com/p/ffmpegsource/issues/detail?id=11) >>>>> > >>>>> > >>>>> > solves it but unfortunately I tried it but nothing happened and I >>>>> don't know >>>>> > what to do ! I am adding the file headers which are being >>>>> automatically >>>>> > detected by netbeans so the libraries are already found. I tried >>>>> adding >>>>> > these -lavdevice -lavformat -lavcodec -lavutil -lswscale -lbz2 to the >>>>> > linker as well >>>>> > >>>>> > ( >>>>> > >>>>> http://libav-users.943685.n4.nabble.com/QT-and-FFmpeg-undefined-reference-to-av-free-and-more-td946811.html >>>>> > ) >>>>> > >>>>> > when adding them netbeans knew them and gave them proper library >>>>> icons (thus >>>>> > it recognized that these libraries are present otherwise it would've >>>>> > replaced them with a white icon with question mark). But, when >>>>> compiling I >>>>> > get this >>>>> > >>>>> > /usr/bin/ld: cannot find -l-lavdevice >>>>> > /usr/bin/ld: cannot find -l-lavformat >>>>> > /usr/bin/ld: cannot find -l-lavcodec >>>>> > /usr/bin/ld: cannot find -l-lavutil >>>>> > /usr/bin/ld: cannot find -l-lswscale >>>>> > /usr/bin/ld: cannot find -l-lbz2 >>>>> > >>>>> > And this is really killing me. I have been trying to solve this for >>>>> days. >>>>> > >>>>> > Thank you in advance. >>>>> >>>>> _______________________________________________ >>>>> Libav-user mailing list >>>>> [email protected] >>>>> http://ffmpeg.org/mailman/listinfo/libav-user >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> Libav-user mailing list >>>> [email protected] >>>> http://ffmpeg.org/mailman/listinfo/libav-user >>>> >>>> >>> >>> _______________________________________________ >>> Libav-user mailing list >>> [email protected] >>> http://ffmpeg.org/mailman/listinfo/libav-user >>> >>> >> >> _______________________________________________ >> Libav-user mailing list >> [email protected] >> http://ffmpeg.org/mailman/listinfo/libav-user >> >> > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > >
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