alexjc/shadertoy-render

shadertoy-render

.. image:: docs/example.jpg :target: https://youtu.be/GAauIQFHaZs

A simple Python script that uses ffmpeg as a subprocess to render ShaderToy scripts into video files. After grabbing the file from the repository, you can run it as follows:

> python shadertoy-render.py example.glsl example.mp4

Command-line arguments are documented with the -h switch, for example:

• --size — Resolution of the render window, for example 1920x1080.
• --duration — Total length of the output video in seconds, e.g. 45.0.
• --rate — Number of frames per second used during rendering, e.g. 60.
• --verbose — Show the full output of ffmpeg in verbose mode.

Example of more advanced usage:

> python shadertoy-render.py in.glsl out.mp4 --size=1920x1080 --rate=60 --duration=120.0

It should run on Linux and OSX where ffmpeg is in the path, on Windows with minor changes assuming the binary is found. Python dependencies include numpy and vispy, which you can install them with PIP as follows:

> pip install numpy vispy

The output is a MP4 file with default encoding settings, which you can upload to YouTube for example. See the source code for details!

1. Source ShaderToy <https://www.shadertoy.com/view/4sB3D1>_ script by Inigo Quilez.

2. Rendered Video <https://youtu.be/GAauIQFHaZs>_ at 1080p uploaded to YouTube.

Feedback or comments are welcome; just submit a ticket or follow @alexjc <https://twitter.com/alexjc>_ on Twitter.