Hi Zhenfeng Ren,<br /><br />I suspect there is another glib on your system which is conflicting with the one under gstreamer/lib. <br />Please try this step and see if it works...<br /><br />#export LD_LIBRARY_PATH=/home/opt/gstreamer/lib:/home/opt/system_files_gstreamer:/usr/lib<br /><br />Thanks,<br />Gireesh<br /><br />On Jan 7, 2009 2:20pm, zhenfeng ren &lt;1985renzf@gmail.com&gt; wrote:<br />&gt; hi,Gireesh:<br />&gt; <br />&gt; I set<br />&gt; <br />&gt; LD_LIBRARY_PATH=/usr/lib:/home/opt/system_files_gstreamer:/home/opt/gstreamer/lib<br />&gt; <br />&gt; <br />&gt; <br />&gt; Thanks,<br />&gt; <br />&gt; Zhenfeng Ren<br />&gt;