Build your own image
sudo docker build -t asciinema2gif .
Test image
sudo docker run -it --name asciinema-some lhuckaz/asciinema2gif asciinema rec
or
Test image with docker commands and keep container in background
sudo docker run -d --name asciinema-some -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):/usr/bin/docker lhuckaz/asciinema2gif sleep infinity
Run commands in background container
sudo docker exec -it asciinema-some asciinema rec
Run asciinema2gif with nº (Ex. https://asciinema.org/api/asciicasts/8332)
sudo docker exec -it asciinema-some asciinema2gif --size small --speed 2 --theme solarized-dark -o "/home/asciinema/another.gif" https://asciinema.org/api/asciicasts/<nº>
Copiar .gif for your host
sudo docker cp asciinema-some:/home/asciinema/another.gif ~/another.gif
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