Captions app SRT export vs Sume burned-in caption cues

The Captions app can export a video together with an SRT subtitle file. Sume's caption output is different: text is burned into the video itself, and the docs describe no sidecar file. If a platform needs a separate track, build it from your own cue list.

Captions facts are from its release notes; Sume facts from Video captions and Generate avatar video, read 2026-10-01.

What does the SRT export do?

The release notes say videos can be exported with an SRT subtitle file, useful for platforms that support external caption tracks. The track stays separate from the picture, so a platform can restyle or switch it off.

What does Sume produce instead?

Standalone captions take a public HTTPS video_url and return a captioned video. Inline captions on an avatar video burn styles into the clean final MP4. Neither page describes SRT or VTT output; the caption page lists SRT uploads as unsupported and says to pass phrase-level text as cues instead.

Can I author the caption text myself?

Yes. Pass cues (or segments) with text, start and end and Sume burns that overlay copy without speech-to-text. That same list is a good source for writing an .srt yourself, since you already hold the timings.

Is there an extra charge for inline captions?

Inline captions do not create a separate billed video-caption job. Standalone captioning of an existing clip is its own job; see our burn captions onto video guide.