alexjc/shadertoy-render

Shadertoy-render turns visual effects code from the ShaderToy website into video files you can save and share. ShaderToy is a popular site where people write small programs that generate stunning animations, but it only runs in your browser. This tool lets you take those scripts and render them directly to an MP4 file, ready to upload to YouTube or use in other projects. The tool works by reading a ShaderToy script file and using your computer's graphics capabilities to calculate each frame of the animation. It then hands those frames to a widely-used video tool called ffmpeg, which stitches them together into a standard MP4 file. You can control the output by specifying the resolution (like 1920x1080 for HD), the frame rate, and how long the video should run. The process runs as a simple command line operation. This is useful for digital artists, demo scene creators, or anyone who wants to showcase a ShaderToy creation in video form rather than requiring viewers to visit a website. For example, if you wrote a mesmerizing generative animation on ShaderToy and want to include it in a video reel, post it on YouTube, or embed it in a presentation, this tool handles the conversion for you. The project is built as a straightforward Python script rather than a complex application. It relies on two common Python libraries for the math and graphics rendering, plus the ffmpeg video tool installed on your computer. It keeps things simple by focusing on the core task of capturing frames and encoding them, leaving any fine-tuning of video quality to the default encoding settings.