Install latest gst-ffmpeg package, there you will find ffdec_mjpeg. 

On Mon, Nov 29, 2010 at 11:58 PM, Brian Michalk <> wrote:
I am trying to put together a gst-launch pipeline to play some AVI
files.  I'm using

gst-launch -v uri=<my input filename>

And the errors it returns:
*** Message: don't know how to handle video/x-avi-unknown,
ERROR: from element /GstPlayBin:playbin0: You do not have a decoder
installed to handle this file.  You might need to install the necessary

So, which plugin do I need to decode this file?  I have browsed the
plugins page, but can't find an mjpg capability.

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Sudarshan Bisht