thanks for the reply but listen what happen
i have the speed full, when the size is 0 the video is in the centre, when i increase it start moving from : 1.the left side of the screen (if i choose left and right posittion)
2. the bottom side of the screen (if i choose up &down)
3. the left bottom corner of the screen (if i choose right,down,left,up)
the more i increase the size the more the video going out of the screen.
i check in the grid and the video is in the centre.
this is happen only with the sound in option.
what shall i do guys, please any possible suggestions..