What It Does
SpeedX is a time remapping plugin that uses AI-based optical flow to interpolate new frames between existing ones. The result is smooth slow motion, speed changes, and frame rate conversion that holds up better around complex motion than Premiere Pro’s built-in tools.
The core technology analyzes per-pixel motion vectors and accounts for occlusion at motion boundaries, which is where most frame interpolation breaks down. SpeedX handles large motion and edge cases more reliably than traditional optical flow approaches.
Key Features
Four interpolation modes. Smooth and Sharp both use AI processing. Nearest and Blend are non-AI options for lighter tasks. Sharp is the default as of version 1.2.0.
Two retiming modes. Speed Ratio mode lets you slow down or speed up by a multiplier (4x slow, 0.5x speed, etc.). Frame Number mode targets a specific output frame count, which is useful when converting frame rates like 24fps to 120fps.
GPU acceleration. Performance scales heavily with your GPU. The developer explicitly recommends trying the free trial before buying, since results vary depending on hardware.
Occlusion-aware interpolation. The AI specifically accounts for areas where motion boundaries obscure pixels, which reduces artifacts in fast-moving footage like sports, action, or anything with complex foreground-background separation.
Apple Silicon and multi-frame rendering support. Added in late 2021, both are now standard.
Who It’s For
SpeedX is a good fit for editors who regularly work with slow motion effects on footage that wasn’t shot at high frame rates, or anyone doing frame rate conversion for delivery. Sports, nature, and action content benefit the most from the occlusion-aware approach. It works in both Premiere Pro and After Effects, so motion graphics artists who need precise time remapping in AE can use the same plugin.
It’s less useful if your footage was shot at 120fps or higher and you’re just conforming it down. In that case, standard frame blending is fine.
Pricing
SpeedX is a one-time purchase at $99.99 for a single-user license. Floating server and render-only license options are also available. A free trial is offered through aescripts.com before you commit.