Litesum

Video and audio editing

A multi-track timeline with the editing habits you already have.

Litesum Motion is a video and audio editor built on a GPU-first engine: a multi-track timeline with the keyboard and mouse behaviour of established editors, video decoded and encoded on the graphics card, a colour-managed pipeline, and a real mixer. Everything stays on your machine. It has its own code, its own interface and its own project format.

Notify me at launchWhat it can do
In developmentIn development. Not yet released, not signed and not installable; no AV1 export, no proxies, no audio effects yet.In development · Windows first · No release date promised
Native format
.lmotion
Imports
mp4, mov, mkv, webm, mxf, avi · wav, flac, aac, mp3, opus, ogg, aiff, m4a
Exports
MP4, QuickTime, Matroska, WAVE, PNG sequence
Shortcut profiles
Litesum Motion · Vegas Pro 13 Compatible

No screenshot yet. One replaces this panel when the interface settles.

What it can do today

Built and reachable in the current build.

A count of what exists, not a judgement of quality. Confirmed by the Motion team on 2026-09-18.

  • Multi-track editing with familiar keys

    S to split, J/K/L transport, automatic crossfades on overlap, direct trimming with roll, slip and slide, takes, groups, snapping, ripple modes and modifier drags. Shortcut profiles are switchable and held as data.

  • 23 GPU effects, 5 transitions, titles

    Colour (Curves, LUTs, lift/gamma/gain), detail, keying, stylise and geometry families, plus a title generator with outline and shadow. Every parameter animates with keyframes and six easing shapes.

  • Colour management through OpenColorIO

    The display transform is a choice of display and view rather than a mode. Waveform, RGB parade, vectorscope and histogram scopes.

  • A real mixer

    Track strips and buses, automation on gain and pan, stereo and 5.1/7.1 surround panning, and BS.1770 / EBU R128 loudness measurement — measurement only, never correction.

  • Hardware video, both ways

    H.264 and HEVC decoded and encoded on the graphics card through Vulkan Video where the card offers it, written by Litesum rather than shelled out to a tool; software decode otherwise. Encode has no software fallback — on a card without an encode queue Motion refuses by name. Deliver MP4, QuickTime, Matroska, WAVE or a PNG image sequence.

  • Everything stays on your machine

    No uploads, no cloud processing, and no account is needed to edit. There is no network path in the editing or export code.

Files

What it opens and what it saves.

Import and export are different lists and are kept apart on purpose: a wide range of codecs opens, and only the combinations above are written. No AV1 export.
FormatOpensSavesNotes
.lmotionYesYesNative project. Caches live beside it, never inside it.
Import: mp4, mov, mkv, webm, mxf, aviYesSee export rowsEach extension is checked against the linked FFmpeg by a test, so the dialog cannot offer a file this build cannot open. AV1 decodes in software.
Import: wav, flac, aac, mp3, opus, ogg, aiff, m4aYesSee export rowsAudio is mixed at the project rate.
Export: MP4—H.264 or HEVC · AACEncoded on the graphics card.
Export: QuickTime (MOV)—H.264 or HEVC · AAC or PCM—
Export: Matroska (MKV)—H.264 or HEVC · AAC or PCM—
Export: WAVE—PCMSound only.
Export: image sequence—PNG, 8 or 16 bitPicture only.

Requirements

What you need to run it.

Operating system
Windows 11, 64-bit. Windows 10 has never been run here, so it is not claimed. macOS and Linux are intended and not built; neither is offered.
Graphics
A Vulkan 1.2 graphics card, developed and measured on an NVIDIA GeForce RTX 3090. The render graph has a CPU fallback, so the application runs without a Vulkan Video capable card — it then decodes in software and cannot encode H.264 or HEVC, and AV1 export is unavailable regardless.
Hardware encode
H.264 and HEVC encode on the graphics card needs a card with a Vulkan Video encode queue. Where a machine has none, Motion says so by name rather than silently producing nothing.
Signing
Not yet released, not signed and not installable. The licence gate is not written.

Not yet supported

What it does not do, in the team’s own words.

This list is as load-bearing as the capability list. Each item is a recorded decision or a known gap, and the page must not imply otherwise.

AV1 export
Motion decodes AV1; there is no AV1 encoder, and adding one is an open dependency decision.
B-frames
H.264 and HEVC output has none, so files are slightly larger than a mature encoder's at the same quality.
HDR10 mastering metadata
No MaxCLL or MaxFALL. A PQ file is correct PQ but is not complete HDR10.
Proxies
None yet. 4K AV1 footage is not real time on the development machine.
Audio effects
No EQ, compressor, limiter or gate. Gain, fades, normalise, panning and loudness measurement exist; processing does not.
Stabilisation, tracking, optical-flow retiming, noise reduction
None of these exist.
OpenFX plug-ins
No plug-in hosting.
Capture
Nothing from a camera, capture card, microphone or screen.
Text
No automatic wrapping, no bidirectional text and no font fallback.

Membership

Litesum Motion is included in Litesum Complete.

Planned at £9.99 per month for every released Litesum application — 6 are being built to launch together — on 2 computers, cancellable from your account page. Everything you open, edit or export stays on your own computer — never uploaded, never used for training, never held behind a subscription.

Notify me at launchAbout membership

In development · Windows first · No release date promised

Questions

About Motion.

Does it modify my media files?

Never. Source media is read, never written. Caches are disposable and live beside the project, not inside it.

Which formats can it export?

MP4, QuickTime and Matroska with H.264 or HEVC video and AAC (or PCM in MOV and MKV) sound, WAVE for sound alone, and PNG image sequences. AV1 export is not available and the application says so by name rather than failing quietly.

Do I need a particular graphics card?

Any Vulkan-capable card runs the editor, and the render graph has a CPU fallback. Hardware decode and encode need Vulkan Video support, which the application checks for and reports; without an encode queue, hardware encode is not offered.

Has it been independently reviewed?

Not yet. Motion's status is recorded in its feature ledger with evidence per row, and it gets the same independent review as Enhance before it is offered for sale.

The rest of the suite

The other five, on the same membership.

Taken from Litesum Motion's docs/website-copy.md of 18 September 2026, written by the Motion team for this site. The screenshot is deliberately absent until the export drill produces one from a known, complete window.