Okt, could you give us an example of which function name could not be resolved? Am 01.10.2011 22:28 schrieb "mounir younes" <[email protected]>: > 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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