thanks for the quick answer
problem with oRTP solved and i did the same for mediastreamer2 , but i got another error when i want to make mediastreamer2 with `make` command that i couldn't solve
i configured it with "--enable-video=no"
----------------------------------------------------
../src/.libs/libmediastreamer_voip.so: undefined reference to `video_recorder_handle_event'
../src/.libs/libmediastreamer_voip.so: undefined reference to `video_recorder_handle_event'
collect2: error: ld returned 1 exit status
collect2: error: ld returned 1 exit status
make[2]: *** [msaudiocmp] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [mtudiscover] Error 1
make[2]: Leaving directory `/usr/src/linphone-3.9.1/mediastreamer2/tools'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/src/linphone-3.9.1/mediastreamer2'
make: *** [all] Error 2
----------------------------------------------------