Re: video utility

[Alexander Hansen]

On 10/8/12 3:02 AM, ANTON UREVC wrote:
> Hello.
> 
> Reading a movie with Octave (octave ver. 3.4.3) apparantly has some
> issues with video codecs - ffmpeg. Based on my experience an suitable
> avi codec, installing ffmpeg/avformat/avutils and testing the
> video-1.0.2 and video -1.0.1 package the problem was not solved.
> 
> Warning after video-1.0.1 and video-1.0.2 installation in octave is as
> follows:
> 
> warning: this package is empty,
> 
> After testing the video-1.0.0 a usability and presence of avformat
> header files is not found. The error is
> 
> configure: error: FFMpeg header files not found
> ...
> checking for unistd.h... yes
> checking ffmpeg/avformat.h usability... no
> checking ffmpeg/avformat.h presence... no
> checking for ffmpeg/avformat.h... no
> error: called from `pkg>configure_make' in file
> /usr/local/share/octave/3.4.3/m/pkg/pkg.m near line 1327, column 9
> error: called from:
> error:   /usr/local/share/octave/3.4.3/m/pkg/pkg.m at line 790, column 5
> error:   /usr/local/share/octave/3.4.3/m/pkg/pkg.m at line 361, column 9
> 
> 
> Any information would be thankfull.
> Thanks.
> 
> Greetings,
> Jocker//
> 
> 
> 

The missing header files don't come as part of the video package. There
are two possibilities here:

1) You don't actually have the FFMpeg header files installed. Many
distributions separate files needed only for building (headers, etc.)
and files needed at runtime (libraries, executables, etc.) into separate
packages.

2) You have the headers installed, but Octave isn't finding them.  In
this case using something (from Octave) like

putenv("CPPFLAGS","-I/path/containing")

where "/path/containing" should be replaced by the full path which
contains the ffmpeg header directory.

We would need more details about your system to be able to be more specific.
-- 
AKH