This is very cool. I built one of these myself around Christmas; Claude Code can put one together in just a couple prompts (this is also how I worked out how to have Claude test TUIs with tmux). What was striking about my finished product --- which is much less slick than this --- was how much of the heavy lifting was just working out which arguments to pass to ffmpeg.

It's surprisingly handy to have something like this hanging around; I just use mine to fix up screen caps.

Commenting mostly because when I did this I thought I was doing something very silly, and I'm glad I'm not completely crazy.

You can use AI to figure out the arguments to ffmpeg. But indeed it seems like there's just a single call to FFmpeg CLI to power the whole thing which is amazing.

  ffmpegCmd := exec.Command("ffmpeg",
    "-ss", fmt.Sprintf("%.3f", position.Seconds()),
    "-i", p.path,
    "-vf", strings.Join(filters, ","),
    "-vframes", "1",
    "-f", "image2pipe",
    "-vcodec", "bmp",
    "-loglevel", "error",
    "-",
  )