I've written an incomplete ad-hoc renderer in Go: https://github.com/akavel/asciinema2gif https://github.com/akavel/asciinema2gif — it worked in one case where

I've written an incomplete ad-hoc renderer in Go: https://github.com/akavel/asciinema2gif https://github.com/akavel/asciinema2gif — it worked in one case where I needed it personally, but it's missing support for a lot of escape sequences, so it most probably Won't Work For You As Is. But you're free (as in AGPL) and welcome to play with it if you like!