Re: [libcvd-members] Open video error

[Simon Taylor]

There have been some v4l changes on the latest kernel in Ubuntu 11.04 - 
v4l1 has been removed completely, which means videodev.h has been 
deleted too - I just hacked around that in my local version (sorry Ed!) 
by adjusting all the includes, and commenting out the references to the 
v4l1 colourspace defines.

Nothing to do with ffmpeg, but my original configure output for the v4l2 
stuff looked similar to Gabriel's.

Simon

On 02/08/11 23:14, Gerhard Reitmayr wrote:
> 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
>
>
>
>
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