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John Riselvato

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The Pre-Raphaelite Brotherhood, Ophelia, and Life

January 12, 2022March 27, 2022 jdriselvato

Seven days from now I will turn thirty and in the last hours of my twenties I sit with a few regrets. I wish I

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Tutorial

Installing Katago in Sabaki 2 for MacOS (2021)

December 3, 2021December 30, 2021 jdriselvato

Install Sabaki 2 Get download link from this website, get the latest release. Install Katago In terminal: brew install katago Just to make sure this

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Tutorial Programming

(FFmpeg) How to Generate a Color Palette From a Video and apply it to another?

May 21, 2020May 21, 2020 jdriselvato

Ever look at a video with an amazing color grading and wish you could copy it? Getting that look can be accomplished using the palettegen

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Programming Tutorial

(FFmpeg) How to Remove All Colors Except One From a Video?

May 13, 2020May 13, 2020 jdriselvato

FFmpeg has a filter called colorhold with documentation that states: Remove all color information for all RGB colors except for [a] certain one. This is

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Tutorial Programming

(FFmpeg) How to Apply a Vignette to a Video?

May 13, 2020May 13, 2020 jdriselvato

A vignette is a fade that is added to the edges of an input. It’s a simple way to add atmosphere or emulate vintage television

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Tutorial Programming

(FFmpeg) How to RGB Shift a Video?

May 4, 2020May 4, 2020 jdriselvato

RBG shifting is one of the coolest and easiest effects for emulating 3D or add that Vaporwave Aesthetics. With rgbashift, the RGBA pixels can freely

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Programming Tutorial

(FFmpeg) How to Invert the Colors of a Video?

April 29, 2020September 26, 2020 jdriselvato

FFmpeg has a very simple filter, negate, that inverts the colors of the input. The train station looks really futuristic with this filter on. Although

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Programming Tutorial

(FFmpeg) How to Edit the Saturation of a Video?

April 29, 2020April 29, 2020 jdriselvato

Although the hue filter has a saturation variable, FFmpeg also has another filter called vibrance which is used to adjust the color intensity. Both filters

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Tutorial Programming

(FFmpeg) How to extract screenshots from multiple parts of a video (one-liner)?

April 28, 2020April 28, 2020 jdriselvato

This question was asked on the FFmpeg Discord. For some reason the person pinged me to answer it so I took a stab at it.

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Tutorial Programming

(FFmpeg) How to Convert a Video to Black and White?

April 27, 2020April 27, 2020 jdriselvato

Turning a video to black and white is also accomplished by using the hue filter.  Setting the saturation value to 0 results in a black

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