edenfunf (open source) · ReelMimic: Open-Source Multi-Agent Studio That Makes a New 2D Video in a Reference Video's Style with Claude Code or Codex
ReelMimic is a free, MIT-licensed app that runs on your own computer. Give it a video you like and a one-line brief, and it breaks down the reference's editing and look, then a crew of Claude Code or Codex agents plans a new original 2D animated video in the same style for you to approve, builds it, and cross-reviews it shot by shot. It suits creators and small teams who already pay for Claude Code or Codex and want stylized animated videos without animating them by hand.
Best for
Creators, musicians, indie developers, and small marketing teams who already have a Claude Code or Codex subscription, are comfortable installing developer tools, and want stylized 2D animated videos that follow a reference's pacing and look
Not ideal for
Anyone who needs live-action or photoreal 3D output, a quick turnaround, a hosted no-install tool, or predictable costs outside a Claude Code or Codex plan, and teams that cannot let a coding agent run shell commands on their machine without approval prompts
Who it's for
Individual creators and small teams with a Claude Code or Codex subscription who want animated videos in a specific existing style
ReelMimic applies the agent-team habits of coding tools, such as plans approved before work starts, separate reviewers, and fixes that must be proven, to animation. That makes it more deliberate than prompt-and-hope video generators, and the reference-matched storyboard is a real advantage when you want a specific look. The costs are just as real. Each short video takes hours and draws on your Claude Code or Codex allowance, output is limited to 2D, the agents run without approval prompts (Codex with its sandbox off by default), and the project is days old with one main maintainer. Try it on a 30-second piece with the vector or watercolor engine, which have the most use behind them, before planning anything longer.
Who should use it
Musicians, creators, and indie teams who already pay for Claude Code or Codex, have a reference whose style they want for their own content, can wait a few hours for a result, and are comfortable installing Node.js, Python, and FFmpeg.
Who should skip it
People who need live-action, photoreal, or 3D output, a video in minutes, or a hosted service with support, and anyone unwilling to spend coding-agent usage on video or to let coding agents run unattended with shell access.
Open source
Free
Note: ReelMimic has no paid plan and no account. All agent work runs through your Claude Code or Codex login and counts toward that plan's usage; with up to six builders working in parallel by default, a single video can use a significant share. Optional keys for Pixabay, Freesound, and Yating's Taiwanese Mandarin voices come from those services. Bundled third-party skills keep their own licenses, including Apache-2.0 for the HyperFrames skills from HeyGen.
Modalities
Video, Audio, Image, Text
Available models
Animated music video for an independent song
Given a music video you like, your song, and its lyrics, ReelMimic matches the reference's cut rhythm and BPM, times the lyrics to your audio, and builds a hand-painted or vector video whose shots are each reviewed before assembly.
Short explainer in a recognizable format
A whiteboard or faceless-explainer reference sets the pacing and visual language, and the plan stage lets you fix the script and storyboard before the agents spend hours rendering.
Building a reusable house style
Because styles are Markdown files with recognition cues, production defaults, and known pitfalls, a team can record what worked once and have later references routed to the same engine and settings.
ReelMimic vs. Pexo
Pexo is a hosted, credit-billed video agent that generates a finished video from a brief, URL, or your own assets using commercial video and image models, with voiceover, music, and captions, and revisions in chat. ReelMimic is a free, local app that uses your Claude Code or Codex plan to write and render 2D animation, starting from a reference video whose editing and look it matches shot by shot. Pexo suits fast marketing videos without setup, and ReelMimic suits style-matched animation when you can trade time and install effort for control and no extra subscription.
What is ReelMimic?
ReelMimic is an open-source app that makes a new video in the style of one you show it. It analyzes a reference video's editing rhythm, shot lengths, transitions, colors, and camera moves, has a director agent plan an original video for you to approve, and then uses a team of Claude Code or Codex agents to build, review, and fix it shot by shot before delivering an MP4.
Is ReelMimic free?
Yes. The code is MIT-licensed and there is no paid plan or ReelMimic account. All of the agent work runs through your own Claude Code or Codex login, so it counts toward that plan's usage, and long videos with several parallel agents can use a lot of it. Optional keys for Pixabay, Freesound, and Yating voices come from those separate services and are set up by you.
What do I need to run ReelMimic?
Node.js 22.18 or later, Python 3.10 or later, FFmpeg, Chrome, and either Claude Code or the Codex CLI installed and logged in. You clone the repository, run the install script (install.bat on Windows), start it, and open the web app at localhost:4318. It has been tested mostly on Windows; macOS and Linux should work but have had less testing.
Does ReelMimic copy the original video?
It is designed not to. ReelMimic says it learns technique from the reference, such as pacing, framing, transitions, and how the jokes land, and never reuses its footage, characters, logos, or assets. Characters are original unless you supply your own designs, lyrics come only from text you provide, and assets it finds online are logged with their license. The README also says that what you do with the videos is up to you, so you need to make sure you have the rights.
How long does it take to make a video?
According to the README, a 30 to 60 second video usually takes 1 to 3.5 hours after you approve the plan, depending on length and style. Watercolor and crayon are the slowest because every frame is painted with brushes.
What kinds of video can ReelMimic make?
Only 2D animation. It has seven drawing engines: vector motion graphics built on HyperFrames, hand-painted watercolor, crayon picture book, pixel art, paper cut-out stop-motion, whiteboard doodle, and anime cel. It does not produce live-action footage or real people, and 3D references are recreated in 2D.
What can ReelMimic's agents do on my computer?
A lot. The agents run headless without asking for approval: Claude Code is started with Bash, file editing, and web tools pre-approved, and Codex runs with its sandbox set to danger-full-access by default because the stricter workspace-write mode stops it from launching Chrome to render. You can change the Codex mode with the CODEX_SANDBOX setting, but rendering will not work in workspace-write. Run it on a machine where that level of access is acceptable.
ReelMimic vs Pexo: what is the difference?
Pexo is a hosted, credit-based video agent that turns a brief, URL, or your assets into a finished video using commercial generation models, with voiceover, music, and captions. ReelMimic runs on your own computer with your Claude Code or Codex plan, makes 2D animation by having agents write and render it, and is built around matching the style of a reference video you supply. Pexo needs no install and is faster for marketing videos; ReelMimic is free and open source, always plans shot by shot against your reference, and shows every agent review along the way.
ReelMimic starts from a reference video: a local file, a phone recording, or a YouTube link, which it downloads with yt-dlp for analysis. A Python script measures the reference's shots, shot lengths, BPM, transitions, framing, colors, and camera moves, and a director agent writes a style breakdown and matches it to one of the style files in its registry, each of which routes to a production engine. The director then drafts a plan with a storyboard mapped shot by shot to the reference, characters, assets, and a few style frames, and nothing is produced until you approve it. You can discuss the plan in a chat panel, attach screenshots, change settings, or supply inputs it asks for, such as lyrics. After approval the work runs as a production line: up to six builder agents (the default) work on different segments in parallel while each character goes through its own review gate, and every finished shot goes to a fresh reviewer that did not build it once the characters have passed. Failing shots go back to their builder for up to three rounds by default (adjustable per project), and every claimed fix must come with before-and-after crops that the reviewer checks. A final critic looks at seams, continuity, and pacing across the whole film, with up to two revision rounds by default, before the director delivers the MP4, and you can then leave time-stamped notes on the video to request revisions. The app shows each agent's steps, the frames it looked at, and a full log. Output is 2D only, across seven drawing engines: vector motion graphics built on HeyGen's HyperFrames, hand-painted watercolor, crayon picture book, pixel art, paper cut-out stop-motion, whiteboard doodle, and anime cel. The README says the newer five have seen less real-world use than the first two. ReelMimic has no service or API keys of its own. It drives the Claude Code or Codex CLI you are logged into, so every video counts against that plan's usage, and a job that hits a limit pauses and can resume. The tradeoffs are time, setup, and maturity. A 30 to 60 second video usually takes 1 to 3.5 hours after plan approval, the install needs Node.js 22.18+, Python 3.10+, FFmpeg, and Chrome, the agents run without approval prompts, with Codex's sandbox switched off by default so it can launch Chrome for rendering, and the project was created on September 28, 2026, has been tested mostly on Windows, and has almost all of its commits from one maintainer. ReelMimic says it learns technique from the reference rather than reusing its footage, characters, or assets, and that checking you have the rights to what you publish is up to you.
Pieces with no characters no longer build cast sheets or wait on the character review gate, so text-only and motion-graphics videos go straight to shot building.
ReelMimic added crayon picture book, pixel art, paper cut-out stop-motion, whiteboard doodle, and anime cel engines alongside vector motion graphics and hand-painted watercolor.
The ReelMimic repository went public under the MIT license as a local web app that turns a reference video and a brief into a new video made by a crew of Claude Code or Codex agents.
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