I need to display black rectangles of a given size at certain points in time on top of the video. The time and coordinates of the two vertexes are set in the file (similar to a subtitle file): 00:00:19,185 --> 00:00:22,479 [409, 192, 466, 246] 00:02:00,203 --> 00:02:05,082 [361, 139, 604, 303] ... H...