/usr/bin/ld: /home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/lib/libpjmedia-codec-x86_64-unknown-linux-gnu.a(ffmpeg_vid_codecs.o): in function `ffmpeg_codec_encode_whole':
/home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/build/../src/pjmedia-codec/ffmpeg_vid_codecs.c:1463: undefined reference to `avcodec_encode_video2'
/usr/bin/ld: /home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/lib/libpjmedia-codec-x86_64-unknown-linux-gnu.a(ffmpeg_vid_codecs.o): in function `ffmpeg_codec_decode_whole':
/home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/build/../src/pjmedia-codec/ffmpeg_vid_codecs.c:1720: undefined reference to `avcodec_decode_video2'
/usr/bin/ld: /home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/lib/libpjmedia-codec-x86_64-unknown-linux-gnu.a(ffmpeg_vid_codecs.o): in function `pjmedia_codec_ffmpeg_vid_init':
/home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/build/../src/pjmedia-codec/ffmpeg_vid_codecs.c:625: undefined reference to `avcodec_register_all'
/usr/bin/ld: /home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/build/../src/pjmedia-codec/ffmpeg_vid_codecs.c:628: undefined reference to `av_codec_next'
/usr/bin/ld: /home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/build/../src/pjmedia-codec/ffmpeg_vid_codecs.c:628: undefined reference to `av_codec_next'
/usr/bin/ld: /home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/lib/libpjmedia-x86_64-unknown-linux-gnu.a(ffmpeg_util.o): in function `pjmedia_ffmpeg_add_ref':
/home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/pjmedia/build/../src/pjmedia/ffmpeg_util.c:81: undefined reference to `av_register_all'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/benibr/.cache/yay/python-sipsimple/src/python3-sipsimple-5.2.6/build/temp.linux-x86_64-3.10/pjsip/build/rules.mak:125: ../bin/pjmedia-test-x86_64-unknown-linux-gnu] Error 1
make[1]: *** [Makefile:245: pjmedia-test-x86_64-unknown-linux-gnu] Error 2
make: *** [Makefile:14: all] Error 1

Compiling Cython extension sipsimple.util._sha1
cythoning sipsimple/util/_sha1.pyx to sipsimple/util/_sha1.c
error: in 'ext_modules' option (extension 'sipsimple.core._core'), 'sources' must be present and must be a list of source filenames
==> ERROR: A failure occurred in build().
    Aborting...
error making: python-sipsimple