Some vhs tapes have time sync problems, and the rows exhibit severe jitter. This plugin examines the specified window of each of the rows and tries to find the amount by which the pixels are out of alignment, adds the sync signal width and shifts, to put them in correct alignment. Dark scenes with luma less than 50 or so may give erroneous results. The resulting voids at the right ends of the rows are blackened.
RGB,YUY2, Planar formats are supported. In case of RGB the minimum shift value determined for red green and blue colors is used and for YUY2 and Planar formats the Y value is used to determine shift required. The resulting blank ends are blackened .
| Description | Name | Type | Limits | Default |
| Input clip | clip | none | ||
| maximum jitter in pixels | jmax | integer | within clip, >3 | 32 |
| threshold value for detection | th | float | 0.005 to 0.5 | 0.25 |
| sync signal width | wsyn | integer | 0 to frame width-jmax | 10 |
| To my index page | down load plugin | To Avisynth |