Voiceover

Bring the narration as an audio file — read aloud by you, or made with a text-to-speech tool of your own. Kutly cuts the visuals to it.

What the upload takes

In Voiceover the box is a dropzone, headed Drop your narration here, or choose a file over a line reading MP3, M4A or WAV · 8 to 31 min · max 100 MB. A file over 100 MB, or under 8 or over 31 minutes, is refused with the reason on screen. If the length of a file cannot be read, pressing Generate prints that under the composer and asks for a different file; Replace, on the file row, reopens the picker.

Generate — the arrow button at the end of the settings row — is disabled until the upload lands, and the slot beside it says what it is waiting for: Add narration with no file, Finishing upload… while one is on its way.

Length and voice come from the file

In Voiceover the settings row still carries Length, and it cannot be changed. There is no Voice setting at all. Your file sets both: the video is as long as the file, and the file is the voice.

The figure beside Generate is the whole price, with no up to in front of it. The receipt Generate opens totals it under Charged now rather than Held now, because your narration has already fixed the length and there is no difference to come back afterwards. Length and credits has the arithmetic.

Writing narration the footage can follow

Write it as you would read it: whole sentences, with the punctuation spoken — a pause where the full stop is. Let each sentence name the concrete thing it is about, and the place it is seen in. A line that is only a number or a date gives the footage nothing to show.

Your narration is the whole brief. There is no topic box in this mode: the audio file is the input, and no other text you write reaches the render. Style pack and Music are settings of their own in the row under the box, and Subtitles sits in the second row. Ask for one of them out loud and all you get is a line of narration.

What not to type

Every word in the file is heard in the video. A note to the system has nowhere to go here — read aloud, it is narration. Narration that is only instructions to the system, with no video subject in it, is refused: the render fails with your credits returned, the video reads Render failed, and where the player would be the screen prints the reason: “We couldn’t use this narration — it reads as instructions for the system rather than the words to be spoken. Upload or paste the narration itself.”