<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2900.2180" name=GENERATOR></HEAD> <BODY> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008>Dear all,</SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008></SPAN></FONT> </DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008>I create a simple pipeline like this: </SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008> -------------------            --------------</SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008>|  myelement | ------> |   filesink  |</SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008> -------------------            --------------</SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008>but when I set the state of pipeline to PLAYING, the gst_element_set_state() return GST_STATE_CHANGE_ASYNC</SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008>and just cannot be set to PLAYING event after a long time, "myelement" works with other sink element. </SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008>Anyone kindly give some suggestion on this?</SPAN></FONT></DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008></SPAN></FONT> </DIV> <DIV><FONT face=Arial size=2><SPAN class=413443811-10062008> <DIV align=left><FONT face=Arial size=2>Best regards,</FONT></DIV> <DIV align=left><FONT face=Arial size=2>Zhang Chao</FONT></DIV></SPAN></FONT></DIV></BODY></HTML>