Studio → a project → Dub. The film must be published first — a dub is produced against a finished cut.
### Two things that are not the same
Audio dub. New voice track, picture untouched. Mouths keep moving in the original language. Cheap, quick, and exactly right for documentary or narration where nobody is on screen speaking.
Full re-render. Every shot containing dialogue is regenerated with lip-sync to the new track. Expensive, measured in hours, and the only honest option for drama — a close-up of a face saying English words under Spanish audio is the single most noticeable defect in dubbing.
Which one you got is recorded and shown. A dub that claims to be a re-render and is not would be discovered by your audience rather than by you.
### Why this is possible here
Most platforms hold a finished video file, so a dub is the only thing they can do: paste new audio over old picture. Firefly Reels holds the script, the cast's voice profiles and the shot graph — so a dub is a re-render, using the same voice for each character in the new language.
### Pick as many languages as you like
Thirty are available. Select several, press Price it, and you get a per-language plan before anything runs:
- What it will cost and roughly how long it will take.
- Whether it can run at all.
- Lines that may not fit. A line that runs 30% longer in German either overruns its shot or has to be spoken too fast to follow. This is checked before the render, because that is the only point at which it is cheap to fix.
### Languages without lip-sync coverage
Fourteen of the thirty have no phoneme model. Asking for a full re-render in one of those gets an audio dub plus subtitles, and a clear statement of why — a re-render would regenerate every shot and produce the same mouths, at full cost.
### It is resumable
A five-language release is thousands of generations over many hours. Dubs run on the resumable pipeline: per-shot checkpoints, and a resume that continues from where it stopped and re-bills nothing. A deploy at hour four does not discard four hours of paid work.
### What you end up with
Per language: a translated dialogue track in the original cast's voices, re-synced picture (on a full re-render), a subtitle track, and a master. The subtitle track is checked for readability — cues that cannot be read in the time available are reported rather than shipped.