Credits & Licenses

Last updated: 22 September 2026 · Version: 1.4

Epic Transformations is built with the help of open-source software and third-party media providers. This page lists those components and their licences, and provides the attribution required by them. References to a component name do not imply any endorsement by, or affiliation with, its authors.

OpenCut (in-browser video editor)

License: MIT License

Copyright: OpenCut Contributors

Source: github.com/OpenCut-app/OpenCut

The in-browser editor is based on OpenCut, used under the MIT License. The original copyright notice and the full text of the MIT License are retained in our distribution. The MIT name and logo are not used to brand the editor; the reference above is factual attribution only.

FFmpeg (server-side media processing)

License: GPL-3.0-or-later (build includes libx264)

Use: Server-side only (binary on our infrastructure); not distributed to or run in your browser

Project: ffmpeg.org

FFmpeg is used only on our servers as part of the generation pipeline and is not distributed to users. Because there is no distribution of the software to users, GPL obligations to publish our own source code are not triggered. We use an unmodified upstream build of FFmpeg version 6.1.1; we do not modify FFmpeg. The corresponding source code for that version is published by the FFmpeg project and is available from ffmpeg.org.

Mediabunny (in-browser export)

License: Mozilla Public License 2.0 (MPL-2.0)

Use: Client-side (runs in your browser) for video export

Project: mediabunny.dev (source: github.com/Vanilagy/mediabunny)

Mediabunny is used client-side to export your video in the browser. It is licensed under the MPL-2.0, which permits commercial and closed-source use. We do not modify Mediabunny's source files; if we did and distributed those changes, the modified files would be made available under the MPL-2.0.

LAME MP3 Encoder (via @mediabunny/mp3-encoder)

License: LGPL

Use: Client-side MP3 encoding, where used

Project: lame.sourceforge.io

Where MP3 encoding is used in the browser, it is provided through the @mediabunny/mp3-encoder package, which bundles the LAME MP3 Encoder. LAME is licensed under the LGPL, and its authors ask that a link to the project be provided, as above.

Transformers.js (in-browser transcription)

License: Apache License 2.0

Use: Client-side (runs in your browser) for local transcription

Project: github.com/huggingface/transformers.js

Transformers.js is used client-side for local transcription in the browser. It is licensed under the Apache License 2.0. We retain the required copyright and attribution notices, and the Apache 2.0 licence text together with the project NOTICE file (where one is provided) are preserved with the component and available from the project repository at github.com/huggingface/transformers.js.

ACE-Step (AI music generation, via fal.ai)

License: ACE-Step codebase released under the Apache License 2.0; music is accessed as a service through fal.ai under fal.ai's terms

Use: AI-generated background music, accessed through fal.ai

Project: github.com/ace-step/ACE-Step

Background music is generated through fal.ai using the ACE-Step model. The ACE-Step codebase is released under the Apache License 2.0. The music is provided to you as a service through fal.ai, and your right to use the generated music commercially as part of your finished video is granted under fal.ai's terms, as described in our Terms of Service.

Chatterbox Multilingual (AI voice cloning, via fal.ai)

License: Chatterbox released by Resemble AI under the MIT License; speech is accessed as a service through fal.ai under fal.ai's terms

Use: Narration spoken in a voice you have cloned, accessed through fal.ai

Project: github.com/resemble-ai/chatterbox

Where you choose to narrate a video with a cloned voice, the narration is synthesised through fal.ai using the Chatterbox Multilingual model, from the reference recording you uploaded. The Chatterbox codebase is released under the MIT License. The audio is provided to you as a service through fal.ai, and your right to use it commercially as part of your finished video is granted under fal.ai's terms, as described in our Terms of Service.

Wan 2.2 (AI video generation, via WaveSpeed)

License: Wan 2.2 model released by Alibaba under the Apache License 2.0; video is accessed as a service through WaveSpeed under WaveSpeed's terms

Use: AI-generated video clips, accessed through WaveSpeed

Project: github.com/Wan-Video/Wan2.2

When you choose AI-generated visuals, the video clips are generated through WaveSpeed using the Wan 2.2 model. The video is provided to you as a service through WaveSpeed, and your right to use the generated video commercially as part of your finished video is granted under WaveSpeed's terms, as described in our Terms of Service.

Krea 2 Turbo (AI thumbnail generation, via WaveSpeed)

License: no open-source licence is published for this model; it is accessed as a hosted service through WaveSpeed under WaveSpeed's terms

Use: AI-generated thumbnail images, accessed through WaveSpeed

Model: wavespeed.ai/models/wavespeed-ai/krea-v2/turbo

Thumbnails are generated through WaveSpeed using the Krea 2 Turbo model, from a description written either by us from your video or by you. Unlike the other models on this page, Krea 2 Turbo is not released under an open-source licence; WaveSpeed states that commercial usage rights are set by the model provider. The image is provided to you as a service through WaveSpeed, and your right to use it commercially alongside your finished video is granted under WaveSpeed's terms, as described in our Terms of Service.

PostHog (product analytics)

License: Apache License 2.0 AND MIT License

Use: Client-side (runs in your browser), loaded only after you accept analytics cookies

Project: github.com/PostHog/posthog-js

The posthog-js browser library is used client-side to measure how the Service is used. It is dual-licensed under the Apache License 2.0 and the MIT License. We retain the required copyright and attribution notices, and the licence texts together with the project NOTICE file (where one is provided) are preserved with the component and available from the project repository at github.com/PostHog/posthog-js. The library is not loaded at all unless you consent to analytics cookies.

Pexels (stock footage)

License: Pexels License

Provider: pexels.com

Some generated videos may incorporate stock footage from Pexels, used under the Pexels License. That licence permits commercial use; attribution is provided where appropriate. You may not redistribute the underlying stock clips as stand-alone files separately from a finished video.

Fonts (subtitle typefaces)

License: SIL Open Font License 1.1, or the Apache License 2.0, per family as listed below

Use: Typefaces drawn into the subtitles of generated videos, and the previews shown in the subtitle font picker

We bundle 48 font families with the Service. The full font files are used on our servers to draw subtitles into your video. A small subset of each family, carrying only the characters needed to write its own name, is also served to your browser so that the font picker can preview it.

Some families are shipped as a fixed-weight instance generated from the upstream variable font, and every browser preview is a subset. Both are modifications permitted by the licences below, and the modified files stay under the same licence as the originals. The unaltered licence text and copyright notice for each family is distributed with the application alongside the font files, and is linked from the table below.

Families marked SIL Open Font License 1.1 below carry this notice: This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is available with a FAQ at openfontlicense.org

Questions

If you have any question about the components listed on this page or their licences, please contact us at [email protected].