[gst-devel] please help: gst-ffmpeg fails to build with amr support

[Forest Wilkinson [gstreamer]]

Since the amr plugin from gst-plugins-ugly isn't working, as a parallel 
effort, I'm trying to get gst-ffmpeg built with amr support.  I downloaded 
and extracted the amr libraries into gst-ffmpeg-0.10.0/gst-libs/ext/ 
ffmpeg/libavcodec/amr_float/ and passed the --enable-amr_nb switch to 
configure.  Unfortunately, the build fails:

gcc -O2 -g -march=i386 -mcpu=i686 -Wall -Wno-switch -o ffplay 
ffplay-cmdutils.o ffplay-ffplay.o  -L/usr/lib /usr/lib/libSDL.so -lasound 
-L/usr/X11R6/lib -lX11 -lXext -lpthread libavutil/.libs/libavutil.a 
libavformat/.libs/libavformat.a -ldl libavcodec/.libs/libavcodec.a -lz -lm
libavformat/.libs/libavformat.a(allformats.o)(.text+0xe1): In function 
`av_register_all':
/home/forest/rpmbuild/BUILD/gst-ffmpeg-0.10.0/gst-libs/ext/ffmpeg/libavformat/allformats.c:82: 
undefined reference to `amr_init'
collect2: ld returned 1 exit status
make[7]: *** [ffplay] Error 1

I notice that libavcodec/amr.c is missing from the ffmpeg distribution 
that comes with gst-ffmpeg, though it is present in current ffmpeg 
sources.  Why was it removed?  Is that the cause of the problem, or do I 
have to jump through some more hoops to get this working?

Thanks for any help.  I'd love to get amr audio working with gstreamer.