[gst-devel] Gstreamer can not find installed plugins

[Joyious He]

Hi all,
I'm trying to use the plugin mad to play mp3 files.but after i install all these plugins, the gstreamer can not find the right plugins,such as mad, osssink.
/ $ gst-inspect mad
No such element or plugin 'mad'
I did install them in the correct path and some other plugins the gstreamer can find are in the same directory.Is there anything else effects the plugin loading?
BR
Joyious    
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