Hi,Gireesh: > Seems like your GST_PLUGIN_PATH is not correct. Please check if the > following libraries are available under your GST_PLUGIN_PATH (i.e. > /home/opt/gstreamer/lib/gstreamer-0.10) > libgstcoreelements.a > libgstcoreelements.la > libgstcoreelements.so I check again ,and these libraries are under GST_PLUGIN_PATH . Thanks, Zhenfeng Ren