Simon Willison · · 1 min read

Video compressor

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7th September 2026

I recorded a short demo video of my Equal Earth animation on my phone and wanted to publish an optimized version of that video (using FFMPEG) on my blog, so I had Claude Fable 5.1 in Claude Code for web build me this tool using the WebAssembly build of FFMPEG.

Posted 7th September 2026 at 6:29 pm

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ffmpeg video webassembly claude claude-code claude-mythos-fable

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