Clone a voice from an MP4 or WebM file: Sume Voices takes video, 20 MB

Yes: Sume's Voices library will take a video file as the source for a clone. The upload check allows wav, mp3, m4a, mp4, webm, ogg and mpeg files of 1 byte up to 20 MB, and a clone also needs a name, a gender (male, female or nonbinary) and a language tag. The clone is then used by its id as voice.id on a text to speech request. Use your own voice, or one you have written permission to clone.

What the upload check enforces

The check lives in Sume's voice asset policy, which validates the file name extension, the content type and the size before anything is stored. A file with another extension is refused with the message "Upload a wav, mp3, m4a, mp4, webm, or ogg clip." An oversized file is refused with a size message.

Prepare the clip

Cut to one person speaking, without music or room echo. If the speech lives inside a longer video that is already on Sume, audio detach returns a wav or mp3 of just its audio for $0.01 per job, and you can pass range to take a clean stretch.

Choose the language tag that matches the recording. A voice tagged for one language and asked to read another triggers Sume's mismatch warning on the first request.