Hi all, according to http://sip.fontventa.com/content/view/15/44/ i have compiled the mpeg4ip libries without problem. After copying the app_mp4.c file into de Asterisk apps directory and changing the Makefile like. [...] app_sql_odbc.so: app_sql_odbc.o $(CC) $(SOLINK) -o $@ ${CYGSOLINK} $< ${CYGSOLIB} -lodbc app_mp4.so : app_mp4.o $(CC) $(SOLINK) -o $@ ${CYGSOLINK} $< ${CYGSOLIB} -lmp4 -lmp4v2 ifeq (SunOS,$(shell uname)) app_chanspy.so: app_chanspy.o $(CC) $(SOLINK) -o $@ $< -lrt endif [...] i get following error. Mar 21 19:08:22 WARNING[26686]: pbx.c:1720 pbx_extension_helper: No application 'mp4save' for extension... it seems that after the recompilation of asterisk no app_mp4.o/app_mp4.so is created in ../asterisk/apps/. asterisk# ls apps/app_mp* apps/app_mp3.c apps/app_mp3.o apps/app_mp3.so apps/app_mp4.c has anyone an idea... thx in advabce... ____________________________________________________________________________________ Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html