Re: [SoX-users] Build with ffmpeg not working : Redux

[Chris B. <ch...@cn...>]

n_m wrote:
>> If you do have it then please modify the file sox-14.0.1/configure.ac.
>> After modifying, run "autoreconf" in sox-14.0.1 and then rerun
>> configure script.
>>
>> Look for "dnl Check for ffmpeg libraries".  Replace the section I'll
>> list below... The only difference is the order of calling AC_CHECK_LIB
>> and how it updates FFMPEG_LIBS based on it.  I had this problems
>> on cygwin for most libraries recently but didn't try ffmpeg.
>>
>> if test "$with_ffmpeg" != "no"; then
>>     using_ffmpeg=yes
>>     AC_CHECK_HEADER(ffmpeg/avformat.h,
>>         [AC_CHECK_LIB(avutil, av_rescale_q, FFMPEG_LIBS="-lavutil
>> $FFMPEG_LIBS", using_ffmpeg=no)
>>          AC_CHECK_LIB(avcodec, avcodec_decode_audio2,
>> FFMPEG_LIBS="-lavcodec $FFMPEG_LIBS", using_ffmpeg=no)
>>          AC_CHECK_LIB(avformat, av_open_input_file,
>> FFMPEG_LIBS="-lavformat $FFMPEG_LIBS", using_ffmpeg=no)],
>>           using_ffmpeg=no)
>>     if test "$with_ffmpeg" = "yes" -a "$using_ffmpeg" = "no"; then
>>         AC_MSG_FAILURE([cannot find ffmpeg])
>>     fi
>> fi
>>     
>
> I did that. I did get warning message
> /usr/share/aclocal/libgcrypt.m4:23: warning: underquoted definition of
> AM_PATH_LIBGCRYPT
>   run info '(automake)Extending aclocal'
>   or see http://sources.redhat.com/automake/automake.html#Extending-aclocal
>   
> To confirm change in ./configure, I did
> diff configure.ac.orig configure.ac
> 275,278c275,278
> <         [AC_CHECK_LIB(avformat, av_open_input_file,
> FFMPEG_LIBS="$FFMPEG_LIBS -lavformat", using_ffmpeg=no)
> <         AC_CHECK_LIB(avutil, av_rescale_q, FFMPEG_LIBS="$FFMPEG_LIBS
> -lavutil", using_ffmpeg=no)
> <         AC_CHECK_LIB(avcodec, avcodec_decode_audio2,
> FFMPEG_LIBS="$FFMPEG_LIBS -lavcodec", using_ffmpeg=no)],
> <         using_ffmpeg=no)
> ---
>   
>>         [AC_CHECK_LIB(avutil, av_rescale_q, FFMPEG_LIBS="-lavutil
>> $FFMPEG_LIBS", using_ffmpeg=no)
>>          AC_CHECK_LIB(avcodec, avcodec_decode_audio2,
>> FFMPEG_LIBS="-lavcodec $FFMPEG_LIBS", using_ffmpeg=no)
>>          AC_CHECK_LIB(avformat, av_open_input_file,
>> FFMPEG_LIBS="-lavformat $FFMPEG_LIBS", using_ffmpeg=no)],
>>           using_ffmpeg=no)
>>     
>
> Looks right to me.
>
> But, no improvement from before :-(
>
>   
Can you check the timestamp of configure versus your updated 
configure.ac?  I think the warning you showed was actually some sort of 
error and it didn't update configure.  Your log attached shows its still 
trying to check libavcodec before libavutil so I suspect configure is 
still old.

Perhaps I either had a typo or you had one during the update.

Since your now moving on to fix real bugs in v14.0.1 of SoX, I suggest 
starting with most recent copy from current CVS.  It has a verified 
bugfix for linking ffmpeg in the right order.

Download SoX source from CVS as described at http://sox.sf.net and run:

autoreconf -i
./configure
make

Use configure options you've already settled on.

Chris