Problem with Arista Transcoder

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http://forums.fedoraforum.org – I've been trying to install Arista Transcoder on my Fedora 17 KDE 64bit. I install it following the instructions I found in this forum (http://forums.fedoraforum.org/showthread.php?t=261884), and it seems to install correctly. However, when I try to run it, it seems to start and it hangs in there until it disappears after a minute or so. When I type arista-gtk in Terminal, it says: [root@LocalPC]# arista-gtk Traceback (most recent call last): File "/usr/bin/arista-gtk", line 2334, in <module> import gst ImportError: No module named gst Does anyone know what's goi (HowTos)