[CinCV] problem no picture show.

os = ubuntu 9.10 karmic 64 bit
i install cinelerra 2.1 from http://cinelerra.org/getting_cinelerra.php
i try to load file .m2t .avi but it's can't show picture in viewer but it can play sound.
then i install again in version 4.1 but it's have same problem i don't know why ?
how i can do for fix this problem ?
thank you.
                      

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