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When your lines are already written, choose “Paste your script” in the “Story” tool (or “Long video”). The app recognizes the dialogue, performs it word for word, and turns every character who speaks into a cast member. It does not add roles and does not rewrite your lines.
The same format works in “Describe your idea”: as soon as the app finds at least four lines there, it keeps them as they are. The “Paste your script” mode mostly exists to say so clearly.

The format of a line

One line of dialogue per line: the name, an optional acting note in square brackets, a colon, the line.
The brackets are the place for everything a simple list of paces cannot say: [whispers, close to tears], [very fast, without breathing], [chewing].

Shots without speech

Two ways to write a silent moment:
  • Name [action] without a colon: a shot on that character, who says nothing.
  • [SILENCE …] alone on its line: a silent shot that belongs to nobody. Describe what we see. You can write the word in your language ([SILENCIO …], [STILLE …]): any line alone between square brackets is a silent shot.

The voice over

A line attributed to Narrator, Voice over (or Voice-over) or VO is spoken off screen. It is not a character: it is never drawn.
Only these words are recognized as narration (plus the French ones, Voix off, Narrateur, Narratrice). Any other word, such as Announcer or Storyteller, would become a character who is drawn on screen.

A complete example

Here the app reads two characters (Kevin and the teller), seven spoken lines, two silent shots, and about 12 seconds of video. The first line, in prose, is not performed: it is passed to the shot breakdown as a staging instruction.

The two rules that delimit your dialogue

The app has to separate your dialogue from everything around it (titles, notes, instructions). It relies on two rules, and knowing them avoids unpleasant surprises.
1

A real character speaks at least twice

A line like STORY: Kevin wants to withdraw money has the shape of a line of dialogue. What gives it away is that “STORY” appears only once. The names that come back are the characters.
2

The dialogue is one block

The block runs from the first to the last line of a character who comes back. Inside it, everything is kept, even a character who speaks only once. Outside it, nothing is performed.
A lone line right at the beginning or right at the end, spoken by someone who speaks only once, falls outside the block and is not performed. A [SILENCE …] after the last line is not either. Here, “Manager” and “Officer” are dropped:
To keep them, make them speak a second time, or make the dialogue start and end with a character who comes back. The voice over, however, always counts: a narration on the first or the last line is kept.
Other useful rules:
  • At least four lines. Below that, the text is read as an idea, and the AI writes its own lines.
  • Storyboard fields are not characters. Dialogue:, Shot:, SFX:, Prompt:, Camera:, Scene: and their kin are recognized as headings, never as people speaking. Use these English words: their translations in other languages are not recognized and would become characters.
  • Markdown headings are ignored. A line that starts with # is never a line of dialogue.
  • Bold is stripped from names. **Paul**: … gives the character Paul.

The length comes from the script

A script is neither stretched nor squeezed: it sets the length, not the setting. The app estimates it like this:
For a 30 second video without silent shots, aim for about 100 words of dialogue. The assistant’s summary shows “Script length” once the text is pasted.
For a strong hook, the first line must carry the stakes. No “Hi” and no introduction: enter the scene at the moment things tip over. See The rules of a good prompt.

What you can write around the dialogue

Whatever is written before the first line or after the last one is passed to the shot breakdown as a note: the place, the mood, the framing, the pace. Write it in simple sentences.
A line of prose slipped between two lines of dialogue is neither performed nor passed on. For an instruction about a precise moment, put it in the acting note of the line (Malik [stands up, back to the window]: …) or make it a silent shot ([SILENCE, the hallway light goes out]).
To show text on screen, use a marker on its own line ([CARD], [COUNTER], [BANNER]…) for animated cards, counters and labels. See On-screen overlays. Writing “on-screen text:” inside the brackets is only understood in French scripts, so in English always use a marker.

Common mistakes

Lea (blonde, 30 years old, red coat): … mixes appearance and acting. The appearance goes in “Characters” in the references, the acting goes in the brackets.
Zoë then Zoe give two different characters: the case is ignored, the accents are not. Keep exactly the same name.
Aim for 8 words per sentence at most. A long tirade becomes a frozen shot where nothing moves.
Lines written Name: line are recognized even in the middle of a storyboard. But a line filed inside a field (Dialogue: Zoë: Did you hear that?) is not, and the “Image:” and “SFX:” lines placed between two lines of dialogue are lost. Keep one line per line, and put the shot indications in the brackets.