<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=gb2312"> <META content="MSHTML 6.00.2800.1400" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#cce8cf> <DIV><FONT size=2>hi all:</FONT></DIV> <DIV><FONT size=2>    I wrote my gst app which used realvideodec element like this( ignored some non-significant code):</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>main()</FONT></DIV> <DIV><FONT size=2>{</FONT></DIV> <DIV><FONT size=2>    ........</FONT></DIV> <DIV><FONT size=2>    pthread_creat(&my_thread, null, create_pipe_func, null);</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>    while(1)</FONT></DIV> <DIV><FONT size=2>    {</FONT></DIV> <DIV><FONT size=2>        c = getchar();</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>        if(c = 'b')</FONT></DIV> <DIV><FONT size=2>        {</FONT></DIV> <DIV><FONT size=2>            sleep(10);</FONT></DIV> <DIV><FONT size=2>        }</FONT></DIV> <DIV><FONT size=2>    }</FONT></DIV> <DIV><FONT size=2>    </FONT></DIV> <DIV><FONT size=2>}</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>create_pipe_func()</FONT></DIV> <DIV><FONT size=2>{</FONT></DIV> <DIV><FONT size=2>     loop = g_main_loop_new(null, false);</FONT></DIV> <DIV><FONT size=2>     pipeline = _create_pipeline();//make all element and link them, set pad-added callback for delayed link to realvideodec sink pad</FONT></DIV> <DIV><FONT size=2>     gst_element_set_state(pipeline, GST_STATE_PLAYING);</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>     g_mainn_loop_run(loop);</FONT></DIV> <DIV><FONT size=2>}</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>my pipeline is like this:</FONT></DIV> <DIV><FONT size=2>filesrc --> rmdemux --> realvideodec --> fakesink</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>my problem is:</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>I use the app to play rv4 file, and stream thread blocked on close_library().</FONT></DIV> <DIV><FONT size=2>gst log like this(sorry, I can not copy and paste for some reason, so i type some significant logs):</FONT></DIV> <DIV><FONT size=2>------------------------------------------------------------------------------------------------</FONT></DIV> <DIV><FONT size=2>gstelement.c:2496:gst_element_set_state_func:<realvideodec0> final: set state from NULL to READY</FONT></DIV> <DIV><FONT size=2>gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open shared library for real video version 2</FONT></DIV> <DIV><FONT size=2>....</FONT></DIV> <DIV><FONT size=2>gstrealvideodec.c:557:close_library:<realvideodec0> closing library module</FONT></DIV> <DIV> <DIV><FONT size=2>gstrealvideodec.c:456:open_library:<realvideodec0> Attempting to open shared library for real video version 3</FONT></DIV> <DIV><FONT size=2>....</FONT></DIV> <DIV><FONT size=2>gstrealvideodec.c:557:close_library:<realvideodec0> closing library module</FONT></DIV> <DIV><FONT size=2>------------------------------------------------------------------------------------------------</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>no more things logged. I added some print to glib source code and found that <STRONG>dlclose() blocked</STRONG>.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>if  i input 'b' now , stream tread unblocked and went on correctly.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>If my code like :</FONT></DIV> <DIV> <DIV><FONT size=2>main()</FONT></DIV> <DIV><FONT size=2>{</FONT></DIV> <DIV><FONT size=2>    ........</FONT></DIV> <DIV><FONT size=2>    create_pipe_func();</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>    </FONT><FONT size=2>    </FONT></DIV> <DIV><FONT size=2>}</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>create_pipe_func()</FONT></DIV> <DIV><FONT size=2>{</FONT></DIV> <DIV><FONT size=2>     loop = g_main_loop_new(null, false);</FONT></DIV> <DIV><FONT size=2>     pipeline = _create_pipeline();//make all element and link them, set pad-added callback for delayed link to realvideodec sink pad</FONT></DIV> <DIV><FONT size=2>     gst_element_set_state(pipeline, GST_STATE_PLAYING);</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>     g_mainn_loop_run(loop);</FONT></DIV> <DIV><FONT size=2>}</FONT></DIV></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>every thing is ok. </FONT></DIV> <DIV><FONT size=2>why? </FONT></DIV></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV></BODY></HTML>