It's a simple python package to play videos in a terminal using ASCII characters.

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Requirements

Python3
PortAudio (Only required for installation with audio support)
FFmpeg (Only required for installation with audio support)
Linux or MacOS ... for now

Installation

Standard installation

$ pip3 install video-to-ascii

With audio support installation

$ pip3 install video-to-ascii --install-option="--with-audio"

How to use

Just run video-to-ascii in your terminal

$ video-to-ascii -f myvideo.mp4

Options

--strategy Allow to choose a strategy to render the output.

-o --output Export the rendering output to a bash file to share with someone.

-a --with-audio If an installation with audio support was made, you can use this option to play the audio track while rendering the video ascii characters.

How it works

Every video is composed by a set of frames that are played at a certain frame rate.

Since a terminal has a specific number of rows and columns, we have to resize our video to adjust to the terminal size limitations.

To reach a correct visualization of an entire frame we need to adjust the frame height to match the terminal rows, avoiding using more characters than the number of terminal columns.

When picking a character to represent a pixel we need to measure the relevance of that pixel's color in the frame, based on that we can then select the most appropriate character based on the relative luminance in colorimetric spaces, using a simplified version of the luminosity function.

Green light contributes the most to the intensity perceived by humans, and blue light the least.

This function returns an integer in the range from 0 to 255, we assign a character according to density to show more colored surface for areas with more intense color (highest values).

CHARS_LIGHT 	= [' ', ' ', '.', ':', '!', '+', '*', 'e', '$', '@', '8']
CHARS_COLOR 	= ['.', '*', 'e', 's', '@']
CHARS_FILLED    = ['░', '▒', '▓', '█']

The reduced range of colors supported by the terminal is a problem we need to account for. Modern terminals support up to 256 colors, so we need to find the closest 8 bit color that matches the original pixel in 16 or 24 bit color, we call this set of 256 colors ANSI colors.

Finally, when putting it all together, we will have an appropriate character for each pixel and a new color.

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joelibaceta/video-to-ascii

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