Sampler

An Avisynth filter for pulling samples from a clip

By Ross Thomas <ross@grinfinity.com>

There is no copyright on this code, and there are no conditions on its distribution or use. Do with it what you will.

Description

This is a very simple Avisynth filter to construct "sample strips" from the source clip. This concept is best explained with an example. Suppose you had a source clip that was 10 frames in length, and you used this filter to extract 3 samples, each 2 frames in length. The resulting clip would be exactly 6 frames long, and would be made up of the 1st, 2nd, 5th, 6th, 9th and 10th frames of the original clip. Or, graphically, this clip:

<--Sample 1->               <--Sample 2->               <--Sample 3->

.----. .----. .----. .----. .----. .----. .----. .----. .----. .----.
|  1 | |  2 | |  3 | |  4 | |  5 | |  6 | |  7 | |  8 | |  9 | | 10 |
'----' '----' '----' '----' '----' '----' '----' '----' '----' '----'

becomes this clip:

<--Sample 1-> <--Sample 2-> <--Sample 3->
.----. .----. .----. .----. .----. .----.
|  1 | |  2 | |  5 | |  6 | |  9 | | 10 |
'----' '----' '----' '----' '----' '----'

In other words, this filter pulls out the specified number of evenly distributed samples of the specified length from the source clip and concatenates them into one clip which will always be precisely samples-times-sample-length frames long.

Usage

Sampler(clip clip, int samples, int length)

Known Issues

• None.

TODO

• Your suggestions here :).

Author

Ross Thomas <ross@grinfinity.com>

History