[GRASS-dev] cvs compilation problem - nviz?

[Glynn Clements]

Glynn Clements wrote:

> > almost similar to a recent post of Helena, I have problems compiling cvs 
> > on a fedora 7 / NVIDIA machine. But I get another error:
> > Errors in:
> > /usr/local/src/grass-cvs/grass6/lib/ogsf
> > /usr/local/src/grass-cvs/grass6/visualization/nviz
> > 
> > Changing to /lib/ogsf and running make:
> > gcc -I/usr/local/src/grass-cvs/grass6/dist.i686-pc-linux-gnu/include -g 
> > -O2 -fPIC -DPACKAGE=\""grasslibs"\" -I/usr/local/include 
> > -DPACKAGE=\""grasslibs"\" -I/usr/local/include/ffmpeg 
> > -I/usr/local/src/grass-cvs/grass6/dist.i686-pc-linux-gnu/include \
> > -o OBJ.i686-pc-linux-gnu/gsd_img_ppm.o -c gsd_img_ppm.c
> > In file included from gsd_img_ppm.c:20:
> > /usr/local/include/ffmpeg/avcodec.h:2252: warning: "ImgReSampleContext" is deprecated
> > /usr/local/include/ffmpeg/avcodec.h:2258: warning: "ImgReSampleContext" is deprecated
> > gsd_img_ppm.c: In function "gsd_init_mpeg":
> > gsd_img_ppm.c:122: error: "mpeg1video_encoder" undeclared (first use in this function)
> > gsd_img_ppm.c:122: error: (Each undeclared identifier is reported only once
> > gsd_img_ppm.c:122: error: for each function it appears in.)
> > make: *** [OBJ.i686-pc-linux-gnu/gsd_img_ppm.o] Error 1
> > 
> > As far as I can tell ffmpeg is installed correctly (mpeg1video_encoder 
> > is defined in config.h, no errors) ... any tip?
> 
> It should be declared in avcodec.h:
> 
> 	extern AVCodec mpeg1video_encoder;
> 
> I don't have a config.h in the ffmpeg include directory, and
> gsd_image_ppm.c doesn't #include it (in fact, if it did have
> "#include <config.h>", there's no guarantee that it would be ffmpeg's
> config.h which was included; config.h is a rather common name).
> 
> It appears that your version of ffmpeg isn't compatible with the OGSF
> library; I can only suggest removing --with-ffmpeg from your configure
> command.

I've just upgraded to ffmpeg 0.4.9, and I see the same problem. None
of the installed headers define the *_encoder variables, so I assume
that the only solution which will work with recent versions of ffmpeg
is to replace register_avcodec() with avcodec_register_all().

-- 
Glynn Clements <glynn at gclements.plus.com>