Five new professional editing features, all self-hosted. No cloud, no subscriptions.

Hey ProductHunt!

We just shipped a big batch of features to OpenCut AI, our open-source self-hosted video editor. Here's what's new:

WebGL Transitions

7 built-in transitions — Cross Dissolve, Dip to Black, Slide Left/Right, Wipe Left/Right, and Zoom — rendered with real WebGL dual-texture fragment shaders. Apply between any two adjacent clips on the timeline.

Speed Ramping with Keyframes

Variable playback speed curves per clip. Click to add keyframes, drag to shape the curve. Five presets: Linear, Ease In, Ease Out, Smooth, and Bounce. The renderer integrates the speed curve numerically so the source timestamp always stays frame-accurate even with sharp ramps.

Audio Mixer

A toggleable mixer panel lives at the bottom of the timeline. Per-track volume, stereo pan, and solo/mute — all wired into the Web Audio graph with live AnalyserNode peak and RMS metering. Master levels are measured too. Changes apply in real time during playback.

Proxy Editing

High-res footage (>1080p) can now generate lower-resolution proxy copies at 480p, 720p, or 1080p. Proxies are stored in OPFS alongside the project. The renderer automatically picks the proxy for preview and the original for export. You can generate, regenerate, or delete proxies per-asset from the Settings panel.

AI Video B-Roll (Seedance)

The B-Roll suggestions panel now has a "Generate Video B-Roll" button. It calls the Seedance video generation API, polls for progress with a live percentage indicator, and shows the result in an inline video preview. You can insert it onto the timeline just like a stock image.

Smart Cut (one-click)

A new Smart Cut button in the Quick Actions bar runs filler word removal and silence detection in a single click, tracked as a background task.

Three new background task types added to the task tracker: smart-cut, proxy-generation, and dubbing — so long-running operations are always visible in the UI.

Everything runs locally on your own machine or server. MIT licensed, free forever.