xjadeo is a rather featureless video player (it understands just one
single video encoding) that displays the video frame corresponding to
jack's timebase.
Its purpose is to make possible visual feedback when working on the
soundtrack of a video clip. For this you need audio software that
makes use of jack's transport capabilities.
The idea is simple: your audio software drives jack, and jack drives
xjadeo. Audio and video are synced.
You can find xjadeo 0.1.0 source tarball at:
http://sourceforge.net/projects/xjadeo/
Read the README file for details on building and usage.