Edit subtitles on the timeline — locally, with a live preview

What is shipped today

Cue editing

Add or import SRT/ASS, adjust in/out, style, and on-picture position with a live preview.

Burn-in or soft export

Burn captions into the picture or export MKV soft-subs. Pick the path your client actually asked for.

Not shipped: translate / ASR

Subtitle translate, speech-to-subtitle, and subtitle enhance remain disabled in the desktop catalog. Do not plan a localization job on those yet.

An editor, not a caption SaaS

If you already have a script or an SRT, Subtitle Edit keeps the language track on the workstation. That is the honest job today.

If you need machine translation or speech-to-text, that is not in the current release. Use a specialist and bring the SRT back here to burn or mux.

Preview timing on the worst line

Fast speech and leftover burned-in titles are the hard cases. Check a 1s/3s/5s preview on the densest line before a full export.

How to edit subtitles in KwaFlux

1. 01

   Import the picture

   Open Subtitle Edit and import the video you will caption.

2. 02

   Add or import cues

   Type cues or import SRT/ASS. Style and position on the live preview.

3. 03

   Export burn-in or soft-sub

   Choose burn-in or MKV soft-sub. Translation is not part of this export.

System requirements

Operating system

Windows 10 (64-bit, 1809+) or Windows 11

macOS build coming — planned minimum macOS 13 or newer (Apple Silicon and Intel).

GPU

DirectX 12 compatible discrete GPU (NVIDIA / AMD / Intel Arc)

NVIDIA RTX recommended — TensorRT acceleration is available on RTX. macOS GPU requirements will ship with the Mac build.

Memory

16 GB RAM or above

Keeps previews and export staging responsive under load.

Storage

Fast SSD workspace

Better for caching, temp artifacts, and larger preview sessions.

Windows 10 (64-bit, 1809+) or Windows 11 today; macOS coming — planned minimum macOS 13+.

Frequently Asked Questions

Can KwaFlux translate my captions?

Not in the current release. Subtitle translate and speech-to-subtitle are disabled. Edit and export SRT/ASS or burn-in only.

Hard-burned source titles?

Editing a new track does not erase burned-in titles. Treat any erase path as a separate, best-effort job and preview it.

Is my footage uploaded to the cloud?

No. The AI processing runs on your own GPU and your media files are not uploaded — there is no queue and no per-minute cloud fee. The network is used only for sign-in and license checks (needed to export on a paid plan) and for updates.