PiTiVi relies on the GStreamer multimedia framework and the accompanying
plugins to handle the various medias and their transformation. PiTiVi being
a novelty usage of GStreamer, there are some problems with plugins not 
handling completely/correctly the GStreamer API. These problems are in 
the process of being corrected.

This means that it is not guaranteed that all codecs, containers or effects
work properly with PiTiVi.

WWW: http://www.pitivi.org