I built a tool that lets creators rewrite dialogue in existing videos while keeping character voices

Hey everyone,

I’ve been working on a project called CastWeave AI

And I wanted to share what it does and get honest feedback from creators/editors.

The idea is simple: you upload an audio or video file, and the tool breaks it down speaker-by-speaker, line-by-line.

You can then listen to each line, edit the transcript, assign voices to characters, adjust delivery/tone, and regenerate new audio for those lines.

So instead of re-recording everything manually, the goal is to help with things like:

• fixing a bad line in a video
• changing dialogue after editing
• creating alternate versions of the same scene
• dubbing or adapting content
• experimenting with character voices
• generating new lines using the same character setup

There’s also a voice studio where you can create reusable characters and generate/download lines for them.

I know there are many AI voice tools out there, but most of them feel like standalone text-to-speech tools.

What I’m trying to build is more of a workflow for videos and character-based audio, where the transcript, speaker separation, voice assignment, tone, and regeneration all stay connected in one place.

Would love to hear from creators, editors, animators, or podcasters: