Pan Filter for VirtualDub
Version 1.0

[Place this text file in the VirtualDub plugins directory to make
it available via the Help button on the filter configuration dialog
box. The computer must have a program called Notepad available in
its search path.]

This filter allows you to pan a smaller video window across a larger video, producing
an output video having the dimensions of the panning window. The horizontal and
vertical motions may be independently defined and they may be combined to allow
arbitrary panning direction. One possible application might be to create a pan across
a larger still photo. The still photo must first be used to create a source AVI file. A
number of freeware tools can do this (for example, VideoMach).

The following options are available:

X Origin: The starting horizontal position of the left edge of the panning window.
Specifying a value that places any part of the panning window outside the source frame
will produce undefined results.

X Size: The horizontal size of the panning window.

X Speed: The horizontal speed of the pan. The specified number divided by 16 gives the
number of pixels to move per frame. Check the Neg box if you want right to left motion
instead of the default left to right.

Y Origin: The starting vertical position of the top edge of the panning window.
Specifying a value that places any part of the panning window outside the source frame
will produce undefined results.

Y Size: The vertical size of the panning window.

Y Speed: The vertical speed of the pan. The specified number divided by 16 gives the
number of pixels to move per frame. Check the Neg box if you want bottom to top motion
instead of the default top to bottom.

Starting frame: The frame number at which to start the pan.

Ending frame: The frame number at which to end the pan.

If a pan cannot continue in a given direction because the window hits the edge of the
source frame, motion in that direction will stop. If you put silly values in the edit boxes,
you will get what you deserve!

Feedback and suggestions will be gratefully received.
For additional information, version updates, and other filters, please
go to the following web site:

Filters for VirtualDub
http://www.geocities.com/Colosseum/Pressbox/8699/index.html

Donald Graft
neuron2@home.com
September 27, 2000
(C) Copyright 2000, All Rights Reserved
