| name | meet-videos |
| description | Record cursor-guided demo videos of the OpenVidu Meet frontend (the Angular app served at /meet) for a product landing page. Use when the user asks to record, capture, or generate demo videos / screen recordings / animated clips of the app โ a live meeting, creating a room, joining a meeting, an admin/console tour, etc. Drives the running app with Playwright, injects a synthetic on-screen cursor that glides between elements and flashes a click ripple (the whole point โ Playwright video does NOT capture the real pointer), logs in once and reuses the session, forces light/dark theme, seeds demo data via the REST API, and writes an MP4 per flow + theme (WebM/GIF/animated-WebP also supported). Sibling of the meet-screenshots skill and reuses its login/seeding/live-participant machinery. |
OpenVidu Meet โ cursor-guided demo videos
Record short, animated walkthroughs of the Meet frontend for a marketing landing page. Each
flow is a scripted, cursor-driven tour (not a single still): the cursor glides between UI
elements, clicks with a visible ripple, and types with a natural cadence. The bundled record.mjs
does the work; this file is the flow/selector reference and the place to add new flows.
Standard resolution & format
1920ร1080 (Full HD), deviceScaleFactor: 1, MP4 (H.264), 30 fps โ the default. MP4 plays
inline in every browser via <video autoplay muted loop playsinline>, which is what a landing hero
wants. Pass --format webm|gif|webp for other targets, --scale 2 for HiDPI (heavy โ 4K video).
Prerequisites
- App running at
http://localhost:6080/meet (verify: curl -s -o /dev/null -w "%{http_code}" http://localhost:6080/meet โ 301).
- Playwright + Chromium (already in the repo root
node_modules). Run from the repo root so import 'playwright' resolves.
- ffmpeg on
PATH โ required. Playwright records WebM; ffmpeg transcodes to the chosen format and builds the per-participant fake-camera samples. Without it the tool cannot produce output.
- Admin credentials (default
admin/admin).
How to run
node .claude/skills/meet-videos/record.mjs
node .claude/skills/meet-videos/record.mjs --list
node .claude/skills/meet-videos/record.mjs --flows live-meeting --themes dark
node .claude/skills/meet-videos/record.mjs --flows create-room,console-tour --pace 1.3
Flags: --flows (csv), --themes (light,dark), --width/--height/--scale, --timeout
(ms, default 30000), --pace (motion/pause speed multiplier, >1 slower), --out, --origin,
--base (/meet), --user/--password, --no-cleanup, --headed, --list,
--format (mp4 default | webm | gif | webp), --fps (default 30),
--crf (mp4/webm quality, default 23; lower = better/larger), --quality (gif/webp, default 80),
--gif-width (downscale width for gif/webp, default 1000 โ full-res gif is huge). Fake-camera
video assets: --asset-width (default 960), --asset-fps (12), --asset-seconds (max looped
length, 8) โ these bound the raw Y4M decoded from a video asset (see below).
The synthetic cursor (why this skill exists)
Playwright video capture records the page's compositor output, which does not include the OS
pointer โ a recording of clicks with no visible cursor is useless for a demo. So installCursor()
is injected via context.addInitScript and:
- draws an arrow cursor (
#__ov_demo_cursor__, pointer-events:none) that tracks real mousemove
events, and flashes a ripple on mousedown;
- renders in the browser top layer via the Popover API (
popover="manual" + showPopover()),
and a MutationObserver re-promotes it whenever a CDK overlay opens (see gotcha below);
- survives Angular SPA navigation (the
<body> persists) and is re-installed on full page loads.
Gotcha โ the cursor must be in the TOP LAYER, not just high z-index. Angular Material
dialogs, menus and mat-select panels render in the browser top layer, which paints above
all z-index content โ so a z-index:2147483647 cursor is still hidden behind them (invisible
exactly when you click a modal/menu/option). The fix: the cursor and the click ripple are
popover="manual" elements shown with showPopover() (top layer). Because the top-layer stack is
ordered by promotion time, a MutationObserver watching for added .cdk-overlay-pane /
mat-dialog-container / .mat-mdc-menu-panel / .mat-mdc-select-panel / dialog nodes
re-promotes the cursor (hidePopover()+showPopover()) so it stays on top of the just-opened
overlay. z-index is kept as a fallback for engines without popover support.
moveCursor() drives it with eased (easeInOutQuad), distance-scaled motion โ many small
page.mouse.move steps so the injected cursor follows smoothly. clickSelector() glides to an
element's centre then performs a real locator.click (so the click is reliable AND animated).
typeText() glides, focuses, clears any prefilled value, then types with a per-key delay.
Gotcha โ addInitScript needs a real navigation. It runs on page.goto/full loads, NOT on
page.setContent (no navigation โ cursor never installs). Every flow starts with page.goto.
Gotcha โ empty Material fields need a force click. An empty mat-form-field renders its
floating label over the input's centre, so a normal click hit-tests the label (a non-descendant)
and never lands. typeText() uses locator.click({ force: true }) โ it still fires the real
mouse events the cursor animates while reliably focusing the input.
Video recording & transcode
Contexts are created with recordVideo: { dir, size }; Playwright finalizes the WebM on
context.close(), then video.path() gives the file and ffmpeg transcodes it:
- mp4 (default):
libx264 -pix_fmt yuv420p -movflags +faststart + even dimensions โ plays inline everywhere.
- webm:
libvpx-vp9. gif: palettegen/paletteuse (downscaled). webp: libwebp_anim -loop 0.
Live flows put recordVideo + the cursor only on the filmed participant; background
participants run plain. --pace scales the timing globally if a clip feels too fast/slow.
Split flows (kind:'lifecycle') record one continuous take, but the driver calls mark(name)
at each phase boundary to stamp the elapsed time; after the take, splitSegments() re-encodes the
recording into one clip per segment (accurate output-seeking with ffmpeg -ss/-t). The
room-lifecycle flow also needs a logged-in session AND its own camera, so it runs in a
fake-camera browser with the reused storageState applied (newParticipant({ authed: true })).
Live flows & the sample webcam (shared with meet-screenshots)
The meeting flows drive a real multi-participant meeting. Each participant runs in its own
browser (one chromium.launch per person), because a single browser can only feed one fake-camera
file to all its tabs. Each is launched with --use-fake-device-for-media-stream +
--use-fake-ui-for-media-stream and a per-person --use-file-for-fake-video-capture pointing at a
Y4M transcoded from that person's asset (assets/, cached per file). So every tile shows a
different real person. Faces/names come from SAMPLE_ROSTER in record.mjs; the first entry is
the filmed viewer, the rest are background participants who join first. If ffmpeg or the asset is
missing, that participant falls back to the green test pattern.
Image vs. video assets (real movement)
Each roster asset can be a static image (.jpg/.png) or a video (.mp4/.webm/.mov).
A video looks far more realistic โ the tile shows a moving person instead of a frozen frame.
resolveAsset() picks the best asset by basename, preferring video over image: drop
guy-sample01.mp4 next to guy-sample01.jpg and it's used automatically; delete/omit the video and
it falls back to the image. So the roster filenames don't need to change to adopt video.
sampleY4mFor() decodes a video frame-by-frame into a Y4M that Chromium loops at its end (so the
motion repeats seamlessly), capped by --asset-width/--asset-fps/--asset-seconds โ Y4M is raw
and uncompressed, so a full-res multi-second clip is large; the defaults (960px, 12 fps, โค8 s) keep
each sample ~tens of MB in $TMPDIR. A static image still loops a 1 s still as before.
Recommended assets: short (5โ10 s), loosely-looping talking-head clips at a 4:3/16:9 framing,
one per roster name. If you only have portraits, ffmpeg can fake gentle motion with a Ken-Burns
zoom (-loop 1 -i face.jpg -t 6 -vf "zoompan=z='min(zoom+0.0015,1.25)':d=1:s=1280x720:fps=25"),
though real footage reads best.
Live flows seed their own room per theme and delete it afterwards. Multi-browser joins are
timing-sensitive, so each live flow retries once per theme automatically; if one still fails, re-run
just that theme (--themes dark).
Output naming โ by domain + flow
<out>/<domain>/<flow-id>-<theme>.<ext> (folder = frontend domain, file = flow + theme; <ext>
follows --format). Split flows append the segment name: <flow-id>-<segment>-<theme>.<ext>.
Default --out is ./videos. A default run produces 16 MP4s (5 single-clip flows ร 2 themes +
the 3-segment room-lifecycle flow ร 2 themes):
auth/ login-{light,dark}
meeting/ live-meeting-{light,dark} ยท join-meeting-{light,dark}
meeting/ room-lifecycle-{create,join,record}-{light,dark} (one take, split into 3 clips)
rooms/ create-room-{light,dark}
console/ console-tour-{light,dark}
Flow catalog (built into record.mjs)
| Flow id | Kind | Domain | What the cursor does |
|---|
login | ui (anon) | auth | Starts logged out on /login: cursor types the user id โ types the password โ clicks Login โ lands on the Overview console. Skips reused-session + seeding. |
live-meeting | live (4 ppl) | meeting | Filmed viewer joins a seeded room with 3 others โ toggles mic off/on โ toggles camera off/on โ opens Chat, types & sends a message โ opens the Participants panel โ closes it, ending on the grid. The hero clip. |
join-meeting | live (3 ppl) | meeting | Two participants already in the room; the filmed viewer walks the lobby: types a display name โ clicks the name submit โ device-preview prejoin โ clicks Join โ lands in the populated room. |
enable-captions | live (2 ppl) | meeting | Filmed moderator + one remote participant. The moderator clicks the toolbar captions button to turn live captions ON, then the remote participant "speaks" โ captions stream in word-by-word (interim โ final) at the bottom. Live captions are backend-gated (MEET_CAPTIONS_ENABLED), so the room is created with config.captions.enabled=true, the filmed page stubs GET /config/captions + POST/DELETE /ai/assistants (mirrors the e2e mockCaptionsBackend), and caption text is injected into MeetingCaptionsService._captions via the dev-build Angular debug API (window.ng) โ the fake tone-audio camera produces no real transcription. Requires the non-optimized development build on :6080 (window.ng + unmangled identifiers). |
create-room | ui (admin) | rooms | Rooms list โ clicks Create Room โ basic wizard โ clears the default "Room" and types "Product Demo Room" โ clicks Create Room. |
console-tour | ui (admin) | console | Overview โ clicks each side-nav item (Rooms โ Recordings โ Users โ Configuration) โ back to Overview, lingering on each screen. Uses 3 seeded demo rooms so lists are populated. |
room-lifecycle | lifecycle (admin + own camera) | meeting | One continuous take, split into 3 clips. create: empty overview โ "create first room" card โ wizard โ name โ Create Room (auto-redirects to the prejoin). join: prejoin โ Join, host publishing hostVideo. record: a guest joins publishing guestVideo (2-person meeting) โ more options โ Start recording โ recording active. Needs an empty room list for the first-room card. cleanToolData() removes tool-created rooms and recordings before/after each theme, so light & dark start from an identical empty state. |
Key selectors (verified against the frontend source)
- Console side-nav:
#nav-link-overview ยท #nav-link-rooms ยท #nav-link-recordings ยท #nav-link-users ยท #nav-link-config ยท #nav-link-embedded (id is nav-link-<route>).
- Rooms list / wizard:
#create-room-btn (list) โ /rooms/new opens in basic mode โ .room-basic-creation-form input (name, prefilled "Room") + #create-room-button (submit). Advanced wizard nav: #wizard-next-btn ยท #wizard-finish-btn.
- Lobby / prejoin:
#participant-name-input ยท #participant-name-submit ยท #join-button ยท #layout-container ยท #media-buttons-container.
- In-meeting toolbar:
#mic-btn ยท #camera-btn ยท #screenshare-btn ยท #chat-panel-btn ยท #participants-panel-btn ยท #more-options-btn ยท #grid-layout-settings-btn ยท #leave-btn. Chat: #chat-input ยท #send-btn. Remote tiles: .OV_stream_video.remote; participants panel: ov-participants-panel.
REST API reference (for seeding)
Same API as meet-screenshots. Login (seeding): POST /internal-api/v1/auth/login {userId,password}
โ accessToken. Rooms: POST /api/v1/rooms {roomName} โ {roomId, access.anonymous.moderator.url, โฆ};
GET /api/v1/rooms?maxItems=100 โ {rooms:[โฆ]}; DELETE /api/v1/rooms/:id?withMeeting=force&withRecordings=force
(lowercase enums) deletes a demo room immediately. Anonymous meeting join uses
room.access.anonymous.moderator.url โ no login required.
Safety rules (important)
- Never deletes pre-existing rooms. It snapshots room ids at startup, seeds its own demo rooms
for the UI flows, and the
create-room flow makes one room through the UI. Cleanup removes ONLY
rooms that appeared during the run and weren't pre-existing (tracked by id) โ pre-existing rooms
are always left alone. --no-cleanup keeps everything.
- Live flows create + delete their own room per theme (self-cleaning), so they don't collide with
seeded data.
- Cleanup issues backend
DELETEs; in stricter permission modes those may prompt for approval. If
blocked/failed, the script reports what remains.
Extending coverage
Add an entry to ALL_FLOWS in record.mjs. For a UI flow (kind:'ui'), write an async
drive(page) that page.gotos the start route and uses clickSelector/typeText/moveCursor +
page.waitForTimeout(P(ms)) to script the tour; it runs in the shared logged-in browser with a
fresh recording context per theme. For a live flow (kind:'live', set roomName + count),
write drive(page, url, roster) โ the runner seeds the room, joins count-1 background
participants, then films participant roster[0]. Use the selector list above; pick stable ids and
wait on a loaded-state marker before acting. Keep pauses generous (P(...)) so the motion reads
clearly on the landing page, and use --pace to fine-tune without editing the script.
