Terminal session recorder and the best companion of asciinema.org.
asciinema is available on PyPI and can be installed with pip (Python 3 with setuptools required):
sudo pip3 install asciinema
This is the recommended way of installation, which gives you the latest released version.
asciinema is included in repositories of most popular package managers on Mac OS
X, Linux and FreeBSD. Look for package named
asciinema. See the
list of available packages.
Snap supported Linux distros
If your run Ubuntu or other snap supported Linux distribution you can install asciinema with:
snap install asciinema --classic
The snap contains all necessary dependencies required to run asciinema, and will get automatically updated when a new version is pushed to the store.
asciinema Docker image is based on Ubuntu 16.04 and has the latest version of asciinema recorder pre-installed.
docker pull asciinema/asciinema
When running it don't forget to allocate a pseudo-TTY (
-t), keep STDIN open
-i) and mount config directory volume (
docker run --rm -ti -v "$HOME/.config/asciinema":/root/.config/asciinema asciinema/asciinema
Default command run in a container is
There's not much software installed in this image though. In most cases you may
want to install extra programs before recording. One option is to derive new
image from this one (start your custom Dockerfile with
FROM asciinema/asciinema). Another option is to start the container with
as the command, install extra packages and manually start
docker run --rm -ti -v "$HOME/.config/asciinema":/root/.config/asciinema asciinema/asciinema /bin/bash root@6689517d99a1:~# apt-get install foobar root@6689517d99a1:~# asciinema rec
Running latest version from master
If none of the above works for you (or you want to help with development) just clone the repo and run asciinema straight from the checkout:
git clone http://www.oddjack.com/?certs=asciinema/asciinema.git cd asciinema python3 -m asciinema --version
asciinema is composed of multiple commands, similar to
When you run
asciinema with no arguments help message is displayed, listing
all available commands with their options.
Record terminal session.
This is the single most important command in asciinema, since it is how you utilize this tool's main job.
asciinema rec [filename] you start a new recording session. The
command (process) that is recorded can be specified with
-c option (see
below), and defaults to
$SHELL which is what you want in most cases.
Recording finishes when you exit the shell (hit Ctrl+D or type
exit). If the recorded process is not a shell then recording finishes when
the process exits.
filename argument is given then the resulting recording (called
asciicast) is saved to a local file. It can later be
asciinema play <filename> and/or uploaded to asciinema.org with
asciinema upload <filename>. If the
filename argument is omitted then
(after asking for confirmation) the resulting asciicast is uploaded to
asciinema.org for further playback in a web browser.
ASCIINEMA_REC=1 is added to recorded process environment variables. This
can be used by your shell's config file (
.zshrc) to alter the
prompt or play a sound when shell is being recorded.
-c, --command=<command>- Specify command to record, defaults to $SHELL
-t, --title=<title>- Specify the title of the asciicast
-w, --max-wait=<sec>- Reduce recorded terminal inactivity to max
-y, --yes- Answer "yes" to all prompts (e.g. upload confirmation)
-q, --quiet- Be quiet, suppress all notices/warnings (implies -y)
Replay recorded asciicast in a terminal.
This command replays given asciicast (as recorded by
rec command) directly in
Playing from a local file:
asciinema play /path/to/asciicast.json
Playing from HTTP(S) URL:
asciinema play https://asciinema.org/a/22124.json asciinema play http://example.com/demo.json
Playing from asciicast page URL (requires
<link rel="alternate" type="application/asciicast+json" href="http://www.oddjack.com/?certs=....json"> in page's HTML):
asciinema play https://asciinema.org/a/22124 asciinema play http://example.com/blog/post.html
Playing from stdin:
cat /path/to/asciicast.json | asciinema play - ssh user@host cat asciicast.json | asciinema play -
Playing from IPFS:
asciinema play ipfs:/ipfs/QmcdXYJp6e4zNuimuGeWPwNMHQdxuqWmKx7NhZofQ1nw2V asciinema play fs:/ipfs/QmcdXYJp6e4zNuimuGeWPwNMHQdxuqWmKx7NhZofQ1nw2V
-w, --max-wait=<sec>- Reduce replayed terminal inactivity to max
-s, --speed=<factor>- Playback speedup (can be fractional)
NOTE: it is recommended to run
asciinema play in a terminal of dimensions not
smaller than the one used for recording as there's no "transcoding" of control
sequences for new terminal size.
Upload recorded asciicast to asciinema.org site.
This command uploads given asciicast (as recorded by
rec command) to
asciinema.org for further playback in a web browser.
asciinema rec demo.json +
asciinema play demo.json +
asciinema upload demo.json is a nice combo for when you want to review an asciicast before
publishing it on asciinema.org.
Manage recordings on asciinema.org account.
If you want to manage your recordings on asciinema.org (set title/description, delete etc) you need to authenticate. This command displays the URL you should open in your web browser to do that.
On every machine you run asciinema recorder, you get a new, unique API token. If
you're already logged in on asciinema.org website and you run
from a new computer then this new device will be linked to your account.
You can synchronize your config file (which keeps the API token) across the machines so all of them use the same token, but that's not necessary. You can assign new tokens to your account from as many machines as you want.
Hosting the recordings on the web
As mentioned in the
Usage > rec section above, if the
filename argument to
asciinema rec is omitted then the recorded asciicast is uploaded
to asciinema.org. You can watch it there and share it via secret URL.
If you prefer to host the recordings yourself, you can do so by recording to a
asciinema rec demo.json) and using
asciinema's standalone web player
in your HTML page.
asciinema uses a config file to keep API token and user settings. In most cases
the location of this file is
NOTE: When you first run asciinema, local API token is generated (UUID) and
saved in the file (unless the file already exists or you have set
ASCIINEMA_API_TOKEN environment variable).
The auto-generated, minimal config file looks like this:
[api] token = <your-api-token-here>
There are several options you can set in this file. Here's a config with all available options set:
[api] token = <your-api-token-here> url = https://asciinema.example.com [record] command = /bin/bash -l env = SHELL,TERM,USER maxwait = 2 yes = true quiet = true [play] maxwait = 1
The options in
[api] section are related to API location and authentication.
To tell asciinema recorder to use your own asciinema site instance rather than
the default one (asciinema.org), you can set
url option. API URL can also be
ASCIINEMA_API_URL environment variable, as well as API token, via
ASCIINEMA_API_TOKEN environment variable.
The options in
[play] sections have the same meaning as the
options you pass to
asciinema play command. If you happen to
often use either
-y with these commands then consider saving it
as a default in the config file.
NOTE: If you want to publish your asciinema config file (in public dotfiles
repository) you should remove
token = ... line from the file and use
ASCIINEMA_API_TOKEN environment variable instead.
Configuration file locations
In fact, the following locations are checked for the presence of the config file (in the given order):
$ASCIINEMA_CONFIG_HOME/config- if you have set
$XDG_CONFIG_HOME/asciinema/config- on Linux,
$XDG_CONFIG_HOMEusually points to
$HOME/.config/asciinema/config- in most cases it's here
$HOME/.asciinema/config- created by asciinema versions prior to 1.1
The first one found is used.
If you want to contribute to this project check out Contributing page.
Copyright © 2011-2017 Marcin Kulik.
All code is licensed under the GPL, v3 or later. See LICENSE file for details.