Re: [libcvd-members] Open video error

[Gerhard Reitmayr]

Hi,

I am not sure what is going wrong. make sure you have the -devel packages of 
the various libraries installed as well (ffmpeg-devel ?) These are required to 
compile other software against them.

cheers,
  Gerhard

On 2 Aug 2011, at 23:46, Gabriel wrote:

> 
> 
> 2011/7/14 Gerhard Reitmayr <address@hidden>
> Hi Gabriel,
> 
> you need to configure libcvd with  --enable-gpl so that the VideoFileBuffer 
> is included. VideoFileBuffer uses ffmpeg libraries which are GPL (I guess) 
> and not enabled by default, because it would propagate the GPL terms to the 
> user's code.
> 
> cheers,
>   Gerhard
> 
> Thank for your help... but i cant solve the trouble.
> I run ./configure -with_ffmpeg -with_v4l2 -enable_gpl (for example)
> In the process print: 
> checking for v4l2... no
> checking for strange v4l2... no
> checking linux/videodev.h usability... yes
> checking linux/videodev.h presence... yes
> 
> more...
> 
> checking ffmpeg/avcodec.h usability... no
> checking ffmpeg/avcodec.h presence... no
> checking for ffmpeg/avcodec.h... no
> checking ffmpeg/avformat.h usability... no
> checking ffmpeg/avformat.h presence... no
> checking for ffmpeg/avformat.h... no
> checking ffmpeg/swscale.h usability... no
> checking ffmpeg/swscale.h presence... no
> checking for ffmpeg/swscale.h... no
> checking libavcodec/avcodec.h usability... no
> checking libavcodec/avcodec.h presence... yes
> configure: WARNING: libavcodec/avcodec.h: present but cannot be compiled
> configure: WARNING: libavcodec/avcodec.h:     check for missing prerequisite 
> headers?
> configure: WARNING: libavcodec/avcodec.h: see the Autoconf documentation
> configure: WARNING: libavcodec/avcodec.h:     section "Present But Cannot Be 
> Compiled"
> configure: WARNING: libavcodec/avcodec.h: proceeding with the compiler's 
> result
> checking for libavcodec/avcodec.h... no
> checking libavformat/avformat.h usability... no
> checking libavformat/avformat.h presence... yes
> configure: WARNING: libavformat/avformat.h: present but cannot be compiled
> configure: WARNING: libavformat/avformat.h:     check for missing 
> prerequisite headers?
> configure: WARNING: libavformat/avformat.h: see the Autoconf documentation
> configure: WARNING: libavformat/avformat.h:     section "Present But Cannot 
> Be Compiled"
> configure: WARNING: libavformat/avformat.h: proceeding with the compiler's 
> result
> checking for libavformat/avformat.h... no
> checking libswscale/swscale.h usability... no
> checking libswscale/swscale.h presence... yes
> configure: WARNING: libswscale/swscale.h: present but cannot be compiled
> configure: WARNING: libswscale/swscale.h:     check for missing prerequisite 
> headers?
> configure: WARNING: libswscale/swscale.h: see the Autoconf documentation
> configure: WARNING: libswscale/swscale.h:     section "Present But Cannot Be 
> Compiled"
> configure: WARNING: libswscale/swscale.h: proceeding with the compiler's 
> result
> 
> more...
> 
> Missing options for linux-gnu:
> dc1394v1 dc1394v2 ffmpeg v4l2buffer
> 
> I cant understand why dont work...
> 
>  
> 
> On 14 Jul 2011, at 00:53, Gabriel wrote:
> 
> > I compile this code:
> >
> > #include <cvd/videosource.h>
> > #include <cvd/videodisplay.h>
> > #include <cvd/gl_helpers.h>
> >
> > using namespace CVD;
> >
> > int main()
> > {
> >     try
> >     {
> >         VideoBuffer<Rgb<byte> > * video_buffer =
> > open_video_source<Rgb<byte> >("file://test_jt.avi");
> >         VideoDisplay disp(video_buffer->size());
> >         while(1)
> >         {
> >             VideoFrame<Rgb<byte> > *frame = video_buffer->get_frame();
> >             glDrawPixels(*frame);
> >             video_buffer->put_frame(frame);
> >         }
> >     }
> >     catch(Exceptions::All error)
> >     {
> >         std::cerr << "Error: " << error.what << std::endl;
> >     }
> >
> > }
> >
> > I run the program and get this error: Error: VideoFileBuffer is not
> > compiled in to libcvd.
> > I try many solutions without find the trouble.
> > I appreciate any help
> >
> > --
> > Gabriel
> >
> > Antes de imprimir, pensá en tu responsabilidad y compromiso con el
> > MEDIO AMBIENTE.
> >
> > _______________________________________________
> > libcvd-members mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/libcvd-members
> 
> --
> Gerhard Reitmayr
> Institute for Computer Graphics and Vision
> http://www.icg.tugraz.at/Members/gerhard
> tel: ++43 316 873 5082
> 
> 
> 
> 
> 
> 
> -- 
> Gabriel
> 
> Antes de imprimir, pensá en tu responsabilidad y compromiso con el MEDIO 
> AMBIENTE.
> _______________________________________________
> libcvd-members mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/libcvd-members

--
Gerhard Reitmayr
Institute for Computer Graphics and Vision
http://www.icg.tugraz.at/Members/gerhard
tel: ++43 316 873 5082