Hello All, Voice call is working fine. Now I am working on Video call in PJSIP Ver2.5.5. I have enabled below macro in config_site.h *#define PJMEDIA_HAS_VIDEO 1* and compiled the pjproject. After running the *vidgui, *application hangs and getting the below error on console. X Error: BadWindow (invalid Window parameter) 3 Major opcode: 3 (X_GetWindowAttributes) Resource id: 0x4800007 15:13:18.394 vidwin.cpp !0x4800007 size = 5735535x0 15:13:18.394 vidwin.cpp 0x4800007 new parent handle = 0x500002d, err = 1 X Error: BadWindow (invalid Window parameter) 3 Major opcode: 7 (X_ReparentWindow) Resource id: 0x4800007 Please find the attached log file. QT version installed is *Qt version 4.8.7 *in /usr/lib/x86_64-linux-gnu. Kindly guide me to fix this issue ASAP. Waiting for your reply. Thanks and regards Shantala R