# ReverseFieldDominance

## Abstract

author: Simon Walters
version: 1.2
download: http://www.geocities.com/siwalters_uk/fnews.html
category: Misc Plugins
requirements: YUY2 & RGB Colorspace

## Description

This filter is intended to reverse the field dominance (I refer the read to here for the best explanation of field order on the web) of PAL DV video.

My Matrox G400 TV-out outputs the top field of an avi first and then the bottom field.

But PAL DV is always stored as bottom field first and this filter reverses the field order by simply moving each line up (or down) by one line and duplicating the bottom(or top) line.

Check out this thread in Doom9 to see how it came about and to get Donald Graft's VirtualDub version.

## Syntax

`ReverseFieldDominance` (bool shiftup = true)

## Version History

- Version 1.2; 3rd August 2004
  Correctly shifts RGB material in the right direction – thanks to Wilbert for pointing out the error.
- Version 1.1; 25th Feb 2003
  Adds the shiftup parameter
- Version 1; 23rd Feb 2003
  1st attempt - works in RGB and YUY2 colourspaces only.

`$Date: 2005/06/19 07:23:09 $`