AI Subtitle Generator: Auto Subtitles, Translation and Dubbing

What is an AI subtitle generator, and where is it in BINAI?

An AI subtitle generator listens to the speech in a video, writes it down with timings and shows it on screen as captions. In BINAI it is not a separate app: it is built into Clip a link, the tool that turns a long video into short clips. When you start a clip job from a YouTube, Twitch or X link, or from an MP4 or WebM file you upload, the last choice before you start is Captions, with three options:

• Subtitles: captions in the language the video is already in.
• Translated: captions translated into another language, with the original audio left as it is.
• Dubbed: translated captions plus a new voice track in that language.

So you can subtitle any video you can clip. To caption a whole talk rather than cut it into highlights, drag out the stretch and choose Use my selection as one clip: it comes back as one captioned video.

How does BINAI make the subtitles?

First the speech is transcribed with a timestamp for every word, in a multilingual mode that covers English, Spanish, French, German, Hindi, Russian, Portuguese, Japanese, Italian and Dutch. A video in another language may come back with few or no words, so test a short stretch first.

The words are then grouped into caption lines: a new line starts where the speaker pauses for half a second or more, or when a line would pass 42 characters or about three seconds. Because each word has its own time, the word being spoken lights up as it is said.

Then every line is given time to be read. Each one stays up for at least 0.7 seconds and long enough to read at 21 characters a second, stretching into the silence after it but never over the next line. A line that still cannot get enough time is joined to the next one when the two fit together. The captions land in the clip's project as their own layer, not baked into the footage.

What do the subtitles look like?

New clips start with the Scroll look: tall condensed capitals rolling up one to three big words at a time, with the word being spoken in BINAI's yellow. Where a word suggests one, an emoji is added. The editor has six more looks: Pop, Bold, Neon, Boxed, Bubble and Clean, from heavy outlined capitals to quiet white text.

Can I translate the subtitles?

Yes. Choose Translated and pick English, Italian, Spanish, French, German or Portuguese. The translation works on the numbered caption lines, and each line comes back as exactly one translated line: nothing merged, split or re-timed, so the captions stay in sync with the speaker. The model is asked to keep lines short, leave names, numbers and brands as they are, and keep casual speech casual.

The audio is not touched: viewers hear the original voice and read the translation. A translated line can be longer than the original in the same time, German especially, so run the check on a translated clip before posting.

How does AI dubbing work in BINAI?

Choose Dubbed and pick a language. BINAI translates the captions as above, reads each translated line with an AI voice, one line at a time, and places it where the original line started. A line that would run into the next one is sped up, by up to 30 percent; a short line is never slowed down.

Two things to know. The dub replaces the clip's original sound, so the speaker's voice is no longer heard. And the voice is one standard AI voice, not a copy of the speaker's, so listen to the result before you post.

Can I edit the style, words and timing?

Every clip opens in the editor, where the captions have their own panel:

• Look: any of the seven looks, for the whole clip.
• Spoken word colour: Auto, or one of eight colours.
• Size: bigger or smaller in small steps.
• Emoji: add them across the clip, or remove them all.
• Lines: every line is a text field. Fix a misheard name, cut a filler word, nudge a line's start or end by a tenth of a second, or delete it.

There is no single speed setting. Speed is how much text sits in how much time, and you change it line by line: shorten the words or give the line more time. When you download, you can take the video with captions burned in or a version without them.

Will the check tell me if captions are too fast?

Yes. The content check has a measured check called Captions can actually be read. It fails the video if any line runs faster than 21 characters a second or stays on screen for less than two thirds of a second, and it says how many lines are too fast. A video where someone speaks and there are no captions fails too, since a viewer with the sound off would miss what is said. For clips, the check also counts captions among the things that make an excerpt read as your own edit rather than a re-upload: see how YouTube treats reused content.

The check lowers the risk of an avoidable problem. How far a post travels is always up to the platform.

How much does it cost, and which plan do I need?

Subtitles are part of Clip a link, which is on every paid plan: Solo, Pro, Business and Studio. Without a paid plan you can look around but cannot start a job. Clipping uses about 40 credits per minute of finished clip, captions included; translated captions and dubbing add a little per clip. You see an estimate before you start, and the job is charged for what it actually uses. On Solo, downloaded videos carry a small "made with binai.it" mark; from Pro up they do not. See pricing for what each plan includes.

What are the limits?

• Subtitles are made during a clip job. There is no separate upload-and-caption tool for a finished video.
• Translation and dubbing are offered in six languages: English, Italian, Spanish, French, German and Portuguese, chosen when you start the job.
• One job works on at most four hours of video, and the selection must be at least ten seconds.

For what to do with the captioned clips, read how to turn long videos into shorts, how to repurpose a podcast, making Twitch clips with AI and how often to post.