byted-mediakit-editing Skill for Claude: What It Does and How to Install It

Lets Claude trim, join, mix and add subtitles or images to video and audio through 23 MediaKit tools.

Installs: 12.3K; on skills.sh
Stars: 218; on GitHub
Files: 24; besides SKILL.md
Updated: Sep 2026; last repo commit

byted-mediakit-editing lets Claude edit video and audio through 23 tools in the mediakit-cli editing group. They cover trimming, joining, speed, volume, fades, mixing, cropping, rotating, flipping, image overlays, subtitle burn-in, filters, camera motion, GIF clips and building videos from images or text.

Fifteen tools run in Cloud or Local mode and eight are Cloud only. Claude reads the shared skill and then the tool's reference file before building arguments. Analysis, enhancement and subtitle extraction go to the video skill. It loads when you want to cut, combine or compose existing media.

Good for

Creators who trim, join and mix clips from the terminal
Marketers adding logos, subtitles or scrolling text to video
Teams scripting repeatable edits with ffmpeg-style commands

Install byted-mediakit-editing

Any client

Have these values ready, then replace the placeholders in the snippet.

MEDIAKIT_API_KEY	Required	Cloud API key from the Volcengine console. The README shows local mode without a key.
MEDIAKIT_OUTPUT_PATH	Optional	Folder for local-mode output. The README default is ~/.mediakit/temp.

2
Run this in a terminal.
shell
```
npx @volcengine/mediakit-cli install -y
```

Requires Node.js 18 or later.

The installer sets up the mediakit-cli tool and the skills that ship with it. The editing, audio, image and video skills tell Claude to read byted-mediakit-shared first, so install the set and not one skill alone. There is no Claude app upload route because the skills run the local mediakit-cli command.

From the project README. Source.

What's in the skill

When it loads

面向音频、视频或图片素材组成成片的编辑制作目标，适用于时间线裁剪与拼接、速度和音量调整、视频滤镜、运镜特效、转场、画面裁切旋转翻转、画面叠加、字幕压制、动图截取、淡入淡出、音视频提取与合流、音频混合、文字滚屏成片、图转视频以及多画面空间组合等操作。若用户要给视频添加滤镜效果，或对象和目标族已明确是对现有素材做剪辑、合成、叠加、混合或成片编排，但具体做法不确定，可先加载本 Skill 探索。

Sections in SKILL.md

使用规则
澄清与跨域路由
工具列表

Key facts

Author: volcengine (repo owner)
License: MIT
Installs on skills.sh: 12,250 (Nov 2, 2026)
GitHub stars: 218 for the whole volcengine/mediakit-cli repo (Nov 2, 2026)
Last repo commit: Sep 2, 2026
What it includes: 25 files including SKILL.md: LICENSE and 23 reference files (no scripts)
Needs: The mediakit-cli command (Node.js 18 or later to install). Cloud tools need an API key, and local mode needs ffmpeg 5.1.x and ffprobe
Skill version: 0.2.1 (from SKILL.md frontmatter)
Tools: 23: 15 run in Cloud or Local mode, 8 are Cloud only
Hosts named: byted-mediakit-shared lists cursor, claude-code and codex as example values for the MEDIAKIT_RUNTIME setting
Language: SKILL.md and the reference files are written in Chinese. The README links an English version

What it includes

Overlay an image such as a logo or watermark on a video
Runs in Cloud or Local mode.
Runs code · add-image-to-video
Burn subtitles from a file or text into a video, with style options
Runs in Cloud or Local mode.
Runs code · add-subtitle-to-video
Speed up or slow down audio
Runs in Cloud or Local mode.
Runs code · adjust-audio-speed
Speed up or slow down video
Runs in Cloud or Local mode.
Runs code · adjust-video-speed
Change a video's volume or mute it
Runs in Cloud or Local mode.
Runs code · adjust-video-volume
Add a camera-motion effect to a time range of a video
Cloud only.
Network · apply-camera-motion
Apply a filter effect to a video
Cloud only.
Network · apply-video-filter
Join several audio clips
Runs in Cloud or Local mode.
Runs code · concat-audio
Join videos in order, with optional transitions
Runs in Cloud or Local mode.
Runs code · concat-video
Crop the picture to a rectangle
Cloud only.
Network · crop-video
Cut a GIF or WebP from a time range of a video
Cloud only.
Network · extract-animated-image
Split the audio track out of a video
Runs in Cloud or Local mode.
Runs code · extract-audio
Fade audio in or out
Runs in Cloud or Local mode.
Runs code · fade-audio
Fade a video's audio in or out at the start or end
Runs in Cloud or Local mode.
Runs code · fade-video-audio
Mirror a video up-down or left-right
Runs in Cloud or Local mode.
Runs code · flip-video
Turn several images into a video, with transitions
Cloud only.
Network · image-to-video
Mix several audio files into one mp3
Runs in Cloud or Local mode.
Runs code · mix-audio
Merge an audio stream and a video stream
Runs in Cloud or Local mode.
Runs code · mux-audio-video
Rotate the whole video picture
Cloud only.
Network · rotate-video
Place videos side by side or stacked in one frame
Cloud only.
Network · stitch-video
Turn text into a scrolling 9:16 video
Cloud only.
Network · text-to-scrolling-video
Cut an audio clip by start and end time
Runs in Cloud or Local mode.
Runs code · trim-audio
Cut a video clip by start and end time
Runs in Cloud or Local mode.
Runs code · trim-video

From the official docs

Permissions

Medium risk

What it can do

Read your data
Create and change things
Delete things
Read-only mode

Watch out for

Cloud tools send your media to MediaKit
Input goes to MediaKit's cloud as a public HTTP/HTTPS URL, a MediaKit, VOD or TOS link, or, for tools that accept it, a local file path that the CLI's media adapter uploads (per byted-mediakit-shared SKILL.md). The README names cloud-first as the default mode, so check the mode before giving Claude private media. github.com
Cloud calls use your MediaKit API key and Volcengine billing rules
Cloud tools run through the MediaKit API key you create in the Volcengine console. The README says using the cloud APIs means following Volcengine's billing rules, which it links, and it lists no prices here. It describes local mode as zero cost. Read the rules before batch jobs. github.com
The installer and updater run npm packages
The install command runs @volcengine/mediakit-cli through npx, and the README says mediakit-cli update uses npm install -g. Install only if you trust the package. github.com
Output can be written to your own storage
Cloud tool references describe an optional media_output_destination (vod://space or tos://bucket). Setting it stores results in your Volcengine VOD space or TOS bucket, and the first use needs you to authorize MediaKit to write there. Claude is told to pass it only if you give it. github.com

Security advisories

No published security advisories as of Nov 2, 2026.

Technical details

Turning on read-only	No read-only mode. Review each command before it runs.
Talks to	MediaKit cloud API on Volcengine (Cloud mode: your media or its URL, plus your API key)
Sign-in and keys	README: MEDIAKIT_API_KEY comes from the Volcengine console. mediakit-cli init stores it using the method you choose (config, shell or export), or you can set it as an environment variable.
Scopes	The skill's frontmatter asks for the shell permission and requires the mediakit-cli binary Claude sets MEDIAKIT_SURFACE=skill and MEDIAKIT_RUNTIME on each real call so the CLI knows the caller Local mode runs ffmpeg and ffprobe on your machine and writes results to ~/.mediakit/temp by default

Questions

What does byted-mediakit-editing do?

It lets Claude edit video and audio through mediakit-cli. It can trim, join, speed up, fade, mix, overlay images, burn in subtitles, apply filters and camera motion, and turn images or text into video.

How do I install byted-mediakit-editing?

Use the install box at the top of this page. It runs the MediaKit installer, which sets up the mediakit-cli command and the skills together. Then follow the set-up and check step in the box.

Do I need an API key?

For Cloud tools, yes: the README says to get a MediaKit API key from the Volcengine console. The README shows local trimming as running without an API key, and local mode needs ffmpeg 5.1.x and ffprobe.

Can I upload it to the Claude app?

No. The skill runs the local mediakit-cli command through the shell, so it needs a client that can run commands on your machine, such as Claude Code. The README does not document a Claude app route.

Which editing tools can run locally?

Fifteen of the 23 are marked Cloud or Local in SKILL.md, such as trim-video, concat-video and mix-audio. The other eight, such as apply-video-filter and image-to-video, are Cloud only. The README says local mode uses ffmpeg. The README's feature table marks all 23 editing tools as Cloud or Local, so trust SKILL.md and each tool's --schema for the mode.

What about subtitles from speech or hardcoded subtitle removal?

Those go to the video skill. This skill only burns subtitles you supply, as a file or text, into the picture.

Is it safe?

Installing the skill copies files only: the folder holds SKILL.md, a LICENSE and 23 reference files, with no scripts. Using it makes Claude run mediakit-cli in your shell. Local tools write output files on your machine, and Cloud tools send your media to MediaKit's cloud and use your API key. Review each command and the mode before it runs. Cloud calls follow Volcengine's billing rules, which the README links.

Information

updated Nov 2, 2026

Repository: volcengine/mediakit-cli
Folder: skills/byted-mediakit-editing

volcengine/mediakit-cli skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 3

byted-mediakit-shared SKILL.md · github.com
volcengine/mediakit-cli README · github.com
byted-mediakit-editing SKILL.md · github.com