PNG:

There are two new ways to glitch PNG and APNG files.

ffgac

You can glitch PNG and APNG with scripts directly while encoding them, by using the new -filter_row_script option.

Follow the example script from the PNG and APNG encoding link to encode files like this:

Lena Up Avg Png

ffedit

You can edit values in PNG and APNG files much the same way that you can edit them with other codecs supported by FFglitch. The features for PNG and APNG are described in PNG features.

With the following script (apng_fctl.js):

const APNG_DISPOSE_OP_NONE       = 0;
const APNG_DISPOSE_OP_BACKGROUND = 1;
const APNG_DISPOSE_OP_PREVIOUS   = 2;
const APNG_BLEND_OP_SOURCE = 0;
const APNG_BLEND_OP_OVER   = 1;
export function setup(args)
{
  args.features = [ "headers" ];
}
export function glitch_frame(frame, stream)
{
  const fctl = frame.headers.fcTL;
  if ( !fctl )
    return;
  fctl.dispose_op = APNG_DISPOSE_OP_NONE;
  fctl.blend_op   = APNG_BLEND_OP_OVER;
}

and the following command line:

ffedit -i input.apng -s apng_fctl.js -o output.apng

you can get the following animation:

dharma wheel original

to become like this:

dharma wheel glitched

Live capture:

How come nobody complained so far that live capture support wasn’t enabled? Has nobody been using webcams and HDMI capture for live glitching?

It’s amazing, you should all try it… Or maybe I should write a tutorial on how to do it first…

Thanks to:

I would like to thank Avery Chester for the idea of glitching PNG and APNG files.

I would also like to thank Jared Bruni (the author of Acid Cam and Glitch.GUI) for being a source of inspiration on perseverance and dedication in the Glitch Artists Community. His daily posts about his projects and frequent releases and publications keep reminding me not to slack off on FFglitch development myself.

Download:

As usual, get it in the Download page.