<div dir="ltr">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.<br>
<br><div class="gmail_quote">On Thu, Sep 29, 2011 at 1:39 AM, jan hölscher <span dir="ltr"><<a href="mailto:jan.hoelscher@codergrid.de">jan.hoelscher@codergrid.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
before we can discuss further, please provide the complete command line to the linker and error from it.<div><div></div><div class="h5"><div><br></div><div><br><br><div class="gmail_quote">2011/9/29 mounir younes <span dir="ltr"><<a href="mailto:mounir.younes@gmail.com" target="_blank">mounir.younes@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Yes I did that ! But still having the problem after building.<div><div></div><div><br><br><div class="gmail_quote">
On Wed, Sep 28, 2011 at 7:53 PM, jan hölscher <span dir="ltr"><<a href="mailto:jan.hoelscher@codergrid.de" target="_blank">jan.hoelscher@codergrid.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">did you surround your libav header includes with : <div><br></div><div><div>#ifdef<span style="white-space:pre-wrap"> </span>__cplusplus</div>
<div>extern "C" {</div><div>#endif </div><div>#include <libavformat/avformat.h></div>
<div>#include <libavcodec/avcodec.h></div><div>#include <libavcodec/opt.h></div><div>#include <libavutil/avutil.h></div><div>#include <libswscale/swscale.h></div><div>#include <libavutil/fifo.h></div>
<div>#include <libavutil/rational.h></div><div>#ifdef<span style="white-space:pre-wrap"> </span>__cplusplus</div><div>}</div><div>#endif</div><div><div></div><div><div><br></div><br><div class="gmail_quote">
2011/9/28 mounir younes <span dir="ltr"><<a href="mailto:mounir.younes@gmail.com" target="_blank">mounir.younes@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I gave the names without the linker prefix. I keep getting the "undefined reference to" error and cannot solve it.<br>
<br><div class="gmail_quote"><div><div></div><div>On Sat, Sep 24, 2011 at 10:43 PM, Alex Cohn <span dir="ltr"><<a href="mailto:alexcohn@netvision.net.il" target="_blank">alexcohn@netvision.net.il</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div><p>In your list of libs, "-l" is obviously doubled. Try to give the names to the linker without the prefix.</p>
<div><div></div><div>
<div class="gmail_quote">On Sep 24, 2011 7:58 AM, "mounir younes" <<a href="mailto:mounir.younes@gmail.com" target="_blank">mounir.younes@gmail.com</a>> wrote:<br type="attribution">> Hello, I am new to ffmpeg and I am getting compiling errors while compiling<br>
> c++ code with ffmpeg libraries. It seems that a lot of people are getting<br>> this with the new ffmpeg but I couldn't find a solution that I could<br>> understand.<br>> <br>> I found a link that says that this<br>
> <br>> CXXFLAGS=-D__STDC_CONSTANT_MACROS ./configure<br>> (<a href="http://code.google.com/p/ffmpegsource/issues/detail?id=11" target="_blank">http://code.google.com/p/ffmpegsource/issues/detail?id=11</a>)<br>> <br>
> <br>
> solves it but unfortunately I tried it but nothing happened and I don't know<br>> what to do ! I am adding the file headers which are being automatically<br>> detected by netbeans so the libraries are already found. I tried adding<br>
> these -lavdevice -lavformat -lavcodec -lavutil -lswscale -lbz2 to the<br>> linker as well<br>> <br>> (<br>> <a href="http://libav-users.943685.n4.nabble.com/QT-and-FFmpeg-undefined-reference-to-av-free-and-more-td946811.html" target="_blank">http://libav-users.943685.n4.nabble.com/QT-and-FFmpeg-undefined-reference-to-av-free-and-more-td946811.html</a><br>
> )<br>> <br>> when adding them netbeans knew them and gave them proper library icons (thus<br>> it recognized that these libraries are present otherwise it would've<br>> replaced them with a white icon with question mark). But, when compiling I<br>
> get this<br>> <br>> /usr/bin/ld: cannot find -l-lavdevice<br>> /usr/bin/ld: cannot find -l-lavformat<br>> /usr/bin/ld: cannot find -l-lavcodec<br>> /usr/bin/ld: cannot find -l-lavutil<br>> /usr/bin/ld: cannot find -l-lswscale<br>
> /usr/bin/ld: cannot find -l-lbz2<br>> <br>> And this is really killing me. I have been trying to solve this for days.<br>> <br>> Thank you in advance.<br></div>
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