HI All , I am trying to run m3 file using gst-launch with mad plugin . I have mad plugin in my /usr/local/lib/gstreamer-0.10/libgstmad.so -- gst-launch-0.10 filesrc location=abc.mp3 .mp3 ! audioconvert ! audioresample ! osssink I got : gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstaudioconvert.so': /ut (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstmpegstream.so': /usrt (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstmad.so': /usr/local/t (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstplaybin.so': /usr/loe (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstdvdlpcmdec.so': /usrt (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstvolume.so': /usr/loct (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstaudioresample.so': /l (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstapp.so': /usr/local/e (gst-launch-0.10:826): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-0.10/libgstasf.so': /usr/local/t WARNING: erroneous pipeline: no element "mad" Can anyone help me why gst-laun not able to find mad plugin . "gst-inspect mad " also result in same error . Yours : Umang