Re: [Motion-user] Linking with ffmpeg

[Arvont H. <spe...@ya...>]

I had the same problem.  I fixed it by configuring
ffmpeg as follows

./configure --enable-shared

when ffmpeg is built and installed check
/usr/local/lib and you should see *.so lib files as
opposed to *.a lib files.

Check out this link to the FAQ
http://www.lavrsen.dk/twiki/bin/view/Motion/FrequentlyAskedQuestions#I_got_this_message_when_I_tried

--- aaron barrus <as_...@ya...> wrote:

> Hi all,
> 
> I have a Redhat FC5 box that I'm trying to install
> motion on.  I've downloaded the ffmpeg listed
> on the motion home page, 
>
ffmpeg-cvs-20060306-certified-with-motion-3.2.5.tar.gz,
> built it, and
> installed it.  ./configure motion succeeds and
> appears to find ffmpeg libraries correctly.  But
> when I make motion, I get this:
> 
> Linking Motion...
>
--------------------------------------------------------------------------------
> gcc -L/usr/local/lib -o motion motion.o conf.o
> draw.o video.o netcam.o netcam_ftp.o netcam_jpeg.o
> netcam_wget.o track.o alg.o event.o picture.o
> rotate.o webhttpd.o webcam.o ffmpeg.o -lm  -lpthread
> -ljpeg -L/usr/local/lib -lavformat -lavcodec -lm -lz
> /usr/local/lib/libavformat.a(utils.o): In function
> `dump_format':
> /usr/src/ffmpeg/libavformat/utils.c:2621: undefined
> reference to `ff_gcd'
> /usr/src/ffmpeg/libavformat/utils.c:2608: undefined
> reference to `av_rescale'
> /usr/local/lib/libavformat.a(utils.o): In function
> `compute_pkt_fields':
> ... and eventually ...
> /usr/src/ffmpeg/libavutil/common.h:370: undefined
> reference to `ff_log2_tab'
> /usr/src/ffmpeg/libavutil/common.h:370: undefined
> reference to `ff_log2_tab'
>
/usr/local/lib/libavcodec.a(snow.o):/usr/src/ffmpeg/libavcodec/snow.c:3077:
> more undefined
> references to `ff_log2_tab' follow
> collect2: ld returned 1 exit status
> make: *** [motion] Error 1
> 
> Any suggestion?  
> 
> Thanks!
> 
> Aaron
> 
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