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Record terminal sessions as GIF/MP4/WebM from declarative .tape scripts with VHS. Use when creating terminal demos, recording CLI sessions, VHS tape files, or generating terminal GIFs.
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| name | charm-vhs |
| description | Record terminal sessions as GIF/MP4/WebM from declarative .tape scripts with VHS. Use when creating terminal demos, recording CLI sessions, VHS tape files, or generating terminal GIFs. |
VHS records terminal sessions from .tape scripts. Requires ttyd and ffmpeg on PATH.
brew install vhs # also installs deps on macOS
vhs demo.tape # run a tape file
vhs new demo.tape # scaffold a new tape
vhs record > out.tape # record interactively, then exit
vhs publish demo.gif # host on vhs.charm.sh
Order matters: Output and Set must come before action commands. Require goes at the very top.
Require <program> # fail early if missing from PATH
Output <path> # .gif / .mp4 / .webm / .ascii / frames/
Set <Setting> Value # terminal config (must precede actions)
<actions> # Type, Enter, Sleep, etc.
Output demo.gif
Output demo.mp4
Output demo.webm
Output frames/ # PNG sequence
Output golden.ascii # for CI golden file diffing
Multiple Output lines are fine - all render in one run.
Set Shell "zsh"
Set FontSize 14
Set FontFamily "JetBrains Mono"
Set Width 1200
Set Height 600
Set Padding 20
Set Margin 40
Set MarginFill "#6B50FF"
Set BorderRadius 10
Set WindowBar Colorful # Colorful, ColorfulRight, Rings, RingsRight
Set Theme "Catppuccin Frappe" # run `vhs themes` for full list
Set TypingSpeed 0.05 # seconds per keypress
Set Framerate 60
Set PlaybackSpeed 1.0
Set LoopOffset 50% # where GIF loop starts
Set CursorBlink false
TypingSpeed is the only setting that can change mid-tape. All others are ignored after the first action command.
Type "git status" # types the string
Type@500ms "slowly..." # override typing speed for this line
Type `VAR="backtick escapes quotes"`
Enter
Enter 2 # press N times
Tab
Tab@200ms 3
Backspace 5
Space 2
Up / Down / Left / Right # arrow keys
Up 3 # repeat N times
PageUp / PageDown
ScrollUp 10
ScrollDown@100ms 5
Ctrl+C
Ctrl+Alt+Delete
Sleep 500ms
Sleep 2s
Sleep 0.5 # seconds (float ok)
Wait /regex/ # wait until last line matches (default timeout 15s)
Wait+Screen /regex/ # check whole screen
Wait+Line@10ms /regex/ # poll every 10ms
Wait is better than Sleep for commands with unpredictable runtime (builds, network calls).
Hide
Type "setup stuff not shown in recording"
Enter
Wait /\$/
Show
Use Hide/Show to run setup or cleanup without polluting the demo.
Screenshot path/out.png # capture current frame as PNG
Copy "text" # put text on clipboard
Paste # paste clipboard
Env KEY "value" # set env var
Source config.tape # include another tape
Output demo.gif
Set FontSize 14
Set Width 900
Set Height 400
Set Theme "Catppuccin Frappe"
Set WindowBar Colorful
Set TypingSpeed 0.05
Type "ls -la"
Sleep 300ms
Enter
Sleep 2s
Output demo.gif
Set FontSize 13
Set Width 1200
Set Height 600
Set Theme "Dracula"
Require go
Hide
Type "go build -o myapp . && clear"
Enter
Wait /\$/
Show
Type "./myapp --help"
Sleep 200ms
Enter
Sleep 3s
Hide
Type "rm myapp"
Enter
Output tui-demo.gif
Output tui-demo.mp4
Set FontSize 14
Set Width 1000
Set Height 500
Set WindowBar Rings
Set Margin 30
Set MarginFill "#1a1b26"
Set BorderRadius 8
Set TypingSpeed 0.07
Require gum
Type "gum choose 'Option A' 'Option B' 'Option C'"
Enter
Sleep 500ms
Down
Sleep 300ms
Down
Sleep 500ms
Enter
Sleep 2s
Use the vhs-action GitHub Action to regenerate GIFs on push.
For integration testing, output .ascii and commit as golden files - diff them in CI to catch terminal output regressions.
Output golden.ascii
vhs record > cassette.tape then edit the generated tape to add Set blocks and clean up timingSource to share a config.tape with common Set defaults across multiple tapesWait beats Sleep for anything async - no need to guess how long a build takesLoopOffset makes the GIF preview frame more interesting than frame 0vhs themes lists all built-in theme names