live-devel£¬hi£¡ As I know, Jitter is standard deviation of inter-packet time , but As in the RTPSource.cpp: fJitter += (1.0/16.0) * ((double)d - fJitter); May be it is wrong?? Yours Sincerely ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Fangweiwei ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡fangweiwei at tom.com ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-10-22