I tested a demo postprocessing on a movie.
see http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=404795#Post404795

However, I found that the panel texture playing movie on it, do not have a "lock/unloack" mechanism. It means that when you apply bmap_process, the source image(movie texture) may have parts of two different frames' content, which will come into "interlacement".

How to make sure that
1 lock the panel to be played with movie
2 finish playing a full frame of movie
3 unlock the movie panel
4 processing it
5 lock the movie panel and play the next frame
and so on ?
This is some of "thread synchronization", right?