launch-film

A 20 to 40 second launch film made from a product's own website or App Store page: its real logo, colors, fonts and screens, set in motion with music and sound effects.

npx launch-film@latest linear.app

Watch the film (28 seconds). It was made with the command above and nothing else: no brief, no edits.

Tools that make videos with code usually start from a brief: you describe the product, its colors and the style you want. launch-film starts from the site. easybrandkit reads the logo, colors, fonts and first screen in a headless browser, the page's own headline and section titles become the film's words, and a look is picked to suit the brand. You get an MP4 at 1920x1080, rendered on your machine with Chrome and ffmpeg. There is no account, no API key and nothing is uploaded.

Read the story behind it on my blog: launch-film: A Launch Film From Your Website.

Use it with your agent

launch-film ships as an Agent Skill. Your agent gets the brand, picks a look, writes the scenes from the page's words, renders the film, checks it and hands you the MP4, with the launch pictures if you ask for them.

npx skills add EminBudak/launch-film

That covers Claude Code, Codex, Cursor and the other agents the skills CLI supports. To install it by hand instead:

Claude Code, as a plugin:

/plugin marketplace add EminBudak/launch-film
/plugin install launch-film@launch-film

or as a skill folder:

git clone https://github.com/EminBudak/launch-film
cp -r launch-film/skills/launch-film ~/.claude/skills/

Codex:

cp -r launch-film/skills/launch-film ~/.agents/skills/

Cursor:

cp -r launch-film/skills/launch-film ~/.cursor/skills/

In GitHub Copilot CLI, install it from the repo:

copilot plugin install EminBudak/launch-film

Then ask as usual:

Make a launch video for linear.app

Use it from the command line

npx launch-film <url> [options]          read the brand, plan the film, render it
npx launch-film plan <url> [options]     read the brand and write film.json only
npx launch-film render <film.json>       render a film.json after editing it
npx launch-film frames <film.mp4>        save stills of each clip and a contact sheet
npx launch-film check <film.mp4>         measure a render and write pass or fail
npx launch-film stills <url|film.json>   launch pictures at store and site sizes
npx launch-film looks | types | icons <word> | doctor

  --out <dir>           folder for the brand, film.json and the film (default ./launch-film-<site>)
  --look <name>         launch, aurora, gridline, pop or journal (default: picked from the brand)
  --seconds <n>         aim for 20 to 40 seconds (default 30)
  --aspect 9:16         a vertical film (default 16:9)
  --brand <dir>         use an easybrandkit folder you already have
  --easybrandkit <cmd>  the easybrandkit to run (default: LAUNCH_FILM_EASYBRANDKIT, one on PATH, else easybrandkit with npx)
  --no-music, --no-sfx, --jobs <n>, --keep

A run leaves this behind:

launch-film-linear.app/
  brand/              easybrandkit's kit: logos, colors, fonts, first screen
  words.json          the words read from the page
  film.json           the plan, which you can edit and render again
  film.mp4            the film
  frames/sheet.jpg    two stills from every clip, for checking
  check/CHECK.md      what launch-film check measured, when you run it
  stills/             the launch pictures, when you run launch-film stills

Launch stills

npx launch-film@latest stills linear.app --for ph,og,x,play,chrome

stills makes the pictures a launch needs, at the exact size each place asks for, from the film's look, the brand's logo and the site's real screen. Give it a site and it plans the film first, or give it a film.json you already have, so the pictures match the film you edited.

file	size	for
ph-1.png	1270x760	Product Hunt gallery: the logo, the promise and the site's screen
ph-2.png to ph-6.png	1270x760	Product Hunt gallery: the film's own scenes, from the headline to the logo close
ph-thumbnail.png	240x240	Product Hunt thumbnail: the app icon, or the logo
og.png	1200x630	og:image, the picture a shared link shows
x.png	1600x900	a post on X
play-feature.png	1024x500	the Google Play feature graphic
chrome-small.png	440x280	the Chrome Web Store small promo tile: the logo alone
chrome-marquee.png	1400x560	the Chrome Web Store marquee tile: the logo and the screen, no text

Every picture is an opaque PNG, since Google Play refuses transparency. stills/STILLS.md lists them with what each one is for. Leave out --for to get all of them.

Check a render

npx launch-film@latest check film.mp4 --expect 1920x1080@30 --seconds 30 --lufs -14 --cues cues.json

An agent can't watch a film or listen to it. check measures it with ffmpeg's own filters and writes down what it found:

• CHECK.md: PASS or FAIL, a table of the checks, the stretches it found and every cut.
• check.json: the same, for a program.
• sheet.png: a frame from each shot, numbered, with its cut's time and whether it lands on the beat.
• wave.png: the sound's outline and loudness over time, with the cuts, beats, bars and hits marked.

check	passes when
size and frame rate	they match --expect
length	it is within half a second of --seconds, or inside a range like 28-32
black, still picture, silence	there is no long stretch of one inside the film
loudness	the integrated loudness is within 1 LU of --lufs
true peak	it is -1 dBTP or lower (up to 0 is a warning)
clipping	the sound never reaches full scale or sits flat on its peak
cuts on beats	every cut is within one frame of a beat in --cues

Holds are often meant, so they don't raise alarms: up to 1 s of black at the start and 2 s at the end, an end card that stands still for up to 6 s, and a still picture shorter than 2 s inside the film all pass. A longer stretch is a warning, not a failure, unless most of the film is black or silent. Give the stretches you meant with --allow 27-30 and they count as meant. check exits with 1 when the film fails, so a script can stop on it.

The cuts come from the timeline launch-film writes next to its film. For a film made elsewhere, give them with --cuts 3.2,7.5 or a JSON file. Without either, check finds the hard cuts in the picture, and lists soft changes (a crossfade, or something starting to move) without judging them.

cues.json

--cues reads a track's beats as frame numbers. A tool that fits music to a cut can write it, or you can write it by hand:

{ "fps": 30, "beats": [0, 15, 30, 45], "bars": [0, 60, 120], "hits": [825], "frames": 960, "bpm": 120 }

• fps and beats are needed. Every number is a whole frame at fps, and frame 0 is the film's first frame.
• bars (each bar's first beat), hits (accents an edit should land on, like the drop), frames (the track's length) and bpm are optional.
• Other keys are ignored, so a tool can add its own.

How it works

1. Brand. easybrandkit opens the site in headless Chrome and saves its logos cut on their own background, its button, heading and surface colors, its font families and its first screen at 2x. Given an App Store or Google Play listing, it saves the app's icon, screenshots and rating, and reads the site the listing names.
2. Words. The page's title, description, headline and section titles are read, with the line under each section title. Every word in the film comes from there.
3. Plan. A first film is planned without a brief: the name and its promise, the real screen in a browser window, the page's own sentence as a headline, three sections as feature cards, a number the page states (or an app's store rating), the app's store screenshots, and the logo close with the site's address. It is written to film.json.
4. Render. Each clip is an HTML page with one paused timeline. A virtual clock steps it frame by frame in headless Chrome, so every frame is drawn for its time however long drawing takes, and the frames go to ffmpeg. Two clips render at a time.
5. Sound. The music and every sound effect are synthesised in code for this film: the groove starts on the second clip, each clip lasts whole bars so cuts land on the beat, and the logo lands on a hit. There are no samples.
6. Check. Stills from each clip and a contact sheet are saved, so you (or your agent) can look before sharing. launch-film check measures the film as well: its size, length, black or still stretches, silence, loudness, peaks, and whether the cuts land on the beat.

film.json

{
  "brand": "brand/brand.json",
  "look": "launch",
  "aspect": "16:9",
  "clips": [
    { "kind": "scene", "bars": 2, "scene": { "type": "opener", "title": "Linear", "text": "The product development system for teams and agents" } },
    { "kind": "screen", "bars": 2, "image": "brand/screen-01.png", "mode": "pan" },
    { "kind": "scene", "bars": 2, "scene": { "type": "headline", "title": "Purpose-built for planning and building products with AI *agents*" } },
    { "kind": "scene", "bars": 2, "scene": { "type": "number", "value": "40,000+", "text": "product teams" } },
    { "kind": "logo", "bars": 2, "logo": "brand/logo-01.png", "site": "linear.app" }
  ]
}

kind	what it shows
scene	type in motion; 37 types such as opener, headline, features, number, rating, steps, quote, compare, chat (list them with launch-film types)
screen	a screenshot in a browser window coming in from depth; mode: "zoom" with a box moves the camera onto one part of it
shots	two or three store screenshots side by side, coming in from depth
phone	a phone's screen capture in a drawn phone
scroll	a tall page scrolling in a window
logo	the logo close, from an easybrandkit logo file or an app icon

Words between asterisks are set in the brand's accent color. A bar is one bar of the look's music, about two seconds; give seconds instead if you prefer.

Looks

look		suits
launch	a near-black stage with depth and soft light, type rising out of masks, one bright accent	developer tools, SaaS, dark sites
aurora	frosted glass cards over a slow aurora of the brand's colors	AI products, consumer apps, vivid brands
gridline	a light paper page with hairline columns and giant numerals, one signal color	B2B, finance, light sites
pop	full color fields that change with the cuts, sticker cards with hard shadows	consumer apps, food, games, social
journal	warm paper, newspaper rules, large serif headlines	editorial brands, publications

Requirements

• Node 22 or newer
• Google Chrome or Chromium (set LAUNCH_FILM_CHROME to use another build)
• ffmpeg (set LAUNCH_FILM_FFMPEG and LAUNCH_FILM_FFPROBE to use another build)
• easybrandkit: install it with npm install -g easybrandkit, or launch-film runs it with npx -y easybrandkit@latest (set LAUNCH_FILM_EASYBRANDKIT to use a copy of your own)

Run npx launch-film@latest doctor to check. It has been tested on macOS with Chrome 156 and ffmpeg 7.1, and on Linux with Chrome 155 and ffmpeg 8.0.

Limits

• The film says what the site says. A page with few section titles gives a thin first plan; edit film.json or let your agent write the scenes.
• A brand typeface that Google Fonts does not have is replaced by the look's own, and the render says which.
• easybrandkit needs a site that opens in a headless browser. A bot check or a login wall gets no kit, and a social profile is not a brand's site.
• A 30 second film takes one to three minutes to render on a laptop.
• The music is simple by design. To use your own track: ffmpeg -i film.mp4 -i track.mp3 -map 0:v -map 1:a -c:v copy -shortest out.mp4.

License

MIT. The icons are Phosphor Icons (MIT); see THIRD_PARTY.md for them and for the fonts fetched at render time.