Tools 2026-08-11

The man who wrote Redis spent two days porting a video model to the Mac. It now makes a clip in three and a half seconds.

On 9 August Salvatore Sanfilippo — antirez, the author of Redis — published h3.c, a from-scratch Metal implementation that runs MiniMax's H3 video model natively on Apple Silicon. It passed 1,000 GitHub stars within two days, reached the Hacker News front page on 11 August, and he is still committing to it. H3 is a 33-billion-parameter omni-modal model that generates short clips with synchronised stereo audio from text, images or audio references; MiniMax published its weights on Hugging Face on 3 August. On an M5 Max, h3.c produces a 512×512, 22-frame clip in about 16.7 seconds at its default 20 steps, or roughly 3.5 seconds in an aggressive four-step mode that visibly costs quality. An SSD-streaming path cuts the memory the diffusion transformer needs from 36.5 GB to 2 GB at about a 26% speed penalty, which is what lets it run on machines that could not otherwise hold the model at all. The code is MIT-licensed; the model's own licence is not, and excludes local deployment in the US, EU, UK and South Korea.

Why it mattersVideo generation has been the last thing that still plainly required somebody else's data centre, and the gap between "MiniMax releases the weights" and "it runs on a laptop" was six days — one person, no company, no funding round. That is the pattern worth watching: open weights change little on their own, but they hand the optimisation work to people who are very good at it and will do it for nothing. The licence is the catch, and a growing one: Chinese labs are increasingly shipping weights that are open everywhere except the markets they compete in.

#Coding #Video

✓ Verified · 3 sources

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2026-08-21

The man who wrote Redis spent two days porting a video model to the Mac. It now makes a clip in three and a half seconds.

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