G.729 codec in linphone

Running Manjaro, I installed linphone along with all required libraries from AUR. The application works well except for the fact that the codec list is incomplete. The G.729 codec, for instance is not available.

The log file indicates a few problems:

...
message: 2016-11-12 12:20:39:455 Loading ms plugins from [/usr/lib/mediastreamer/plugins]
message: 2016-11-12 12:20:39:456 Loading plugin /usr/lib/mediastreamer/plugins/libmsbcg729.so.0
...
error: 2016-11-12 12:20:39:456 ms_filter_register(): registration of 'MSBCG729Enc' filter has failed: no fallback factory has been defined
error: 2016-11-12 12:20:39:456 ms_filter_register(): registration of 'MSBCG729Dec' filter has failed: no fallback factory has been defined
message: 2016-11-12 12:20:39:456  libmsbcg729 debug plugin loaded
message: 2016-11-12 12:20:39:456 Plugin loaded (/usr/lib/mediastreamer/plugins/libmsbcg729.so.0)
...
message: 2016-11-12 12:20:39:456 Codec G729/8000 fmtp=[annexb=no] number=18, enabled=0) added to the list of possible codecs.
...
message: 2016-11-12 12:20:39:457 Could not find encoder for G729
message: 2016-11-12 12:20:39:457 Could not find decoder for G729
...

ldconfig -p|grep 729

libbcg729.so.0 (libc6,x86-64) => /usr/lib/libbcg729.so.0
libbcg729.so (libc6,x86-64) => /usr/lib/libbcg729.so

Any idea as to why I need to do for G.729 to be enabled? Thanks for your help.

Linux Elqui 4.4.30-1-MANJARO #1 SMP PREEMPT Tue Nov 1 05:47:13 UTC 2016 x86_64 GNU/Linux