Howdy. PJSIP seems to be an amazing project! I am attempting to compile the 2.7.2 release on Raspian 4.9.80 / RPi3. I am able to compile pjsip successfully without openh264, but when I install it and try to recompile pjsip (which properly recognizes it), I get the error below in the vid_codec_test file. This happens regardless of my entries in config_site.h (#define PJMEDIA_HAS_OPENH264_CODEC 1 has no impact). my config_site.h file: #define PJMEDIA_HAS_VIDEO 1 #define PJMEDIA_AUDIO_DEV_HAS_ALSA 1 #define PJMEDIA_AUDIO_DEV_HAS_PORTAUDIO 0 //tried just about every permutation of the following: #define PJMEDIA_VIDEO_DEV_HAS_FFMPEG 1 #define PJMEDIA_HAS_OPENH264_CODEC 1 #define PJMEDIA_HAS_FFMPEG_VID_CODEC 1 #define PJMEDIA_HAS_FFMPEG_CODEC_H264 1 I can successfully compile with the ./configure --disable-openh264 flag. Here is the compile error. Any ideas I should try? output/pjmedia-test-armv7l-unknown-linux-gnueabihf/vid_codec_test.o: In function `vid_codec_test': vid_codec_test.c:(.text+0x884): undefined reference to `pjmedia_codec_openh264_vid_init' vid_codec_test.c:(.text+0x8b0): undefined reference to `pjmedia_codec_openh264_vid_deinit' collect2: error: ld returned 1 exit status /home/pi/pjsip/pjproject-2.7.2/build/rules.mak:124: recipe for target '../bin/pjmedia-test-armv7l-unknown-linux-gnueabihf' failed make[2]: *** [../bin/pjmedia-test-armv7l-unknown-linux-gnueabihf] Error 1 make[2]: Leaving directory '/home/pi/pjsip/pjproject-2.7.2/pjmedia/build' Makefile:243: recipe for target 'pjmedia-test-armv7l-unknown-linux-gnueabihf' failed make[1]: *** [pjmedia-test-armv7l-unknown-linux-gnueabihf] Error 2 make[1]: Leaving directory '/home/pi/pjsip/pjproject-2.7.2/pjmedia/build' Makefile:14: recipe for target 'all' failed make: *** [all] Error 1 Regards, olivebreath