Re: [GnomeMeeting-devel-list] Failed to load avcodec_set_print_fn

[Rajil Saraswat <rajil saraswat imperial ac uk>]

On Saturday 12 June 2004 02:11, you wrote:
> Rajil,
>
> The error you are getting has nothing to do with ALSA, so don't bother
> with that.
>
> The message you are getting is displayed when OpenH323 cannot find a
> required function in the libavcodec.so file needed for H.263. This file
> is loaded at run-time due to licensing issues, and it obviously exists
> on your system but just as obviously, it is the wrong file.
>
> You don't say whether you are enabling the non-compliant H.263 (the
> default configuration) or the compliant H.263 (which requires the
> --enable-rfc2190avcodec dir option). Either way, you will need a
> modified (and different) libavcodec.so file.
>
> My guess is that are just running "./configure", and your program is
> trying to use the unmodified FFMpeg libavcodec.so file, rather than
> using the modified one that is needed. That will cause the error you are
> getting.
>
> If you don't care about H.263, then you need to stop OpenH323 from
> finding and trying to load the incorrect libavcodec.so file. To do this,
> edit the openh323u.mak file and change "#define H323_AVCODEC 1" to
> "#undef H323_AVCODEC"
>
> If you do want H.263, then read
> http://www.voxgratia.org/docs/h263_codec.html about how to use the
> --enable-rfc2190avcodec option to configure.
>
>     Craig
>
> -----------------------------------------------------------------------
Craig,
     Thanks for your response. I am trying to build gnomemeeting version 
1.0.2.  I am not sure whether i need H263 as my only intention is to converse 
with netmeeting. Looking around for the patches which gentoo has committed to 
openh323 i found the patch given below (openh323-1.13.5-ffmpeg.diff). The bug 
report for this is listed at http://bugs.gentoo.org/show_bug.cgi?id=32754
I guess this is what is creating the problem.  For now, i am trying to compile 
without this patch, would this create a problem communicating with 
netmeeting?

Thanks
Rajil

--- configure.orig      2003-11-05 01:44:44.000000000 +0100
+++ configure   2003-11-05 01:57:55.000000000 +0100
@@ -3384,15 +3384,16 @@
 echo "${ECHO_T}$ac_cv_lib_avcodec_avcodec_open" >&6
 if test $ac_cv_lib_avcodec_avcodec_open = yes; then
   H323_AVCODEC=1
+  AVCODECINCLUDEDIR="/usr/include"
 else
   H323_AVCODEC=
 fi

 fi

-if test "${H323_AVCODEC:-unset}" != "unset" ; then
-  echo "$as_me:$LINENO: checking for /usr/local/include/ffmpeg/avcodec.h" >&5
-echo $ECHO_N "checking for /usr/local/include/ffmpeg/avcodec.h... $ECHO_C" 
>&6
+if test "${H323_AVCODEC:-unset}" = "unset" ; then
+  echo "$as_me:$LINENO: checking for /usr/include/ffmpeg/avcodec.h" >&5
+echo $ECHO_N "checking for /usr/include/ffmpeg/avcodec.h... $ECHO_C" >&6
 if test "${ac_cv_file__usr_local_include_ffmpeg_avcodec_h+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
@@ -3400,7 +3401,7 @@
   { { echo "$as_me:$LINENO: error: cannot check for file existence when cross 
compiling" >&5
 echo "$as_me: error: cannot check for file existence when cross compiling" 
>&2;}
    { (exit 1); exit 1; }; }
-if test -r "/usr/local/include/ffmpeg/avcodec.h"; then
+if test -r "/usr/include/ffmpeg/avcodec.h"; then
   ac_cv_file__usr_local_include_ffmpeg_avcodec_h=yes
 else
   ac_cv_file__usr_local_include_ffmpeg_avcodec_h=no
@@ -3410,6 +3411,7 @@
 echo "${ECHO_T}$ac_cv_file__usr_local_include_ffmpeg_avcodec_h" >&6
 if test $ac_cv_file__usr_local_include_ffmpeg_avcodec_h = yes; then
   H323_AVCODEC=1
+  AVCODECINCLUDEDIR="/usr/include/ffmpeg"
 fi

 fi
@@ -3422,9 +3424,10 @@
 #define H323_AVCODEC 1
 _ACEOF

-  AVCODECINCLUDEDIR=/usr/local/include/ffmpeg
-  AVCODECLIBDIR=/usr/local/lib
+  AVCODECLIBDIR=/usr/lib
   STDCCFLAGS="$STDCCFLAGS -I${AVCODECINCLUDEDIR}"
+  LDFLAGS="$LDFLAGS -L${AVCODECLIBDIR}"
+  LDFLAGS="$LDFLAGS -L${AVCODECLIBDIR}"
+  ENDLDLIBS="-lavcodec $ENDLDLIBS"

   echo  "                      H263 codec on FFmpeg library  enabled"
 fi