Vox Director
Alisa0808/vox-director
Turn ONE topic into a finished Vox-style paper-collage explainer / ad video, end to end on the Atlas Cloud API + local ffmpeg — script, collage keyframes, motion, voice-over, music, captions, all…
Compresses a single video file to stay under a user-specified max file size using FFmpeg.
Install Video Compress To Size
$ npx skills add godot-fun/gai --skill video-compress-to-size -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install godot-fun/gai video-compress-to-size --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/video-compress-to-size .claude/skills/video-compress-to-size && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "video-compress-to-size" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-size into .claude/skills/video-compress-to-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "video-compress-to-size", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-sizeType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add godot-fun/gai --skill video-compress-to-size -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install godot-fun/gai video-compress-to-size --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/video-compress-to-size .agents/skills/video-compress-to-size && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "video-compress-to-size" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-size into .agents/skills/video-compress-to-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "video-compress-to-size", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add godot-fun/gai --skill video-compress-to-size -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install godot-fun/gai video-compress-to-size --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/video-compress-to-size .cursor/skills/video-compress-to-size && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "video-compress-to-size" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-size into .cursor/skills/video-compress-to-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "video-compress-to-size", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/godot-fun/gai.git --path .agents/skills/video-compress-to-size--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add godot-fun/gai --skill video-compress-to-size -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install godot-fun/gai video-compress-to-size --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/video-compress-to-size .gemini/skills/video-compress-to-size && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "video-compress-to-size" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-size into .gemini/skills/video-compress-to-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "video-compress-to-size", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install godot-fun/gai video-compress-to-sizeInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add godot-fun/gai --skill video-compress-to-size -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/video-compress-to-size .github/skills/video-compress-to-size && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "video-compress-to-size" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-size into .github/skills/video-compress-to-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "video-compress-to-size", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add godot-fun/gai --skill video-compress-to-size -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install godot-fun/gai video-compress-to-size --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/video-compress-to-size .opencode/skills/video-compress-to-size && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "video-compress-to-size" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/video-compress-to-size into .opencode/skills/video-compress-to-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "video-compress-to-size", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
video-compress-to-size- GitHub stars
- 183
- Token cost
- ~973 tokens
- SKILL.md length
- 352 words
- Files
- 2
- Skills in repo
- 36
- Repo updated
- First seen
- Licence
- MIT
At a glance
Compresses a single video file to stay under a user-specified max file size using FFmpeg.
- Works in 8 steps: Use the bundled script, not hand-written… → Always pass --max-size from the user… → Prefer GPU — do not pass --cpu unless… → …
- The user wants to compress video
- SKILL.md covers Rules, Quick Start, Size Syntax and Format Defaults, plus 3 more sections
- Calls python
What it does
Video Compress To Size is an agent skill from godot-fun/gai. Compresses a single video file to stay under a user-specified max file size using FFmpeg. Prefers GPU encoders (NVENC / AMF / QSV) with VBR bitrate targeting; falls back to CPU two-pass H.264/HEVC. Use when the user wants to compress video, reduce video file size, shrink MP4/MKV/MOV under N MB, GPU encode, NVENC compress, or re-encode a clip to a size limit.
Its SKILL.md is about 970 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `reference.md`).
It sits in Media & Creative, covering Video production. It works with FFmpeg and Python. The repository describes itself as: A lightweight AI agent and skill workflow framework built with Godot. The licence is MIT.
When your agent uses it
- The user wants to compress video
- Reduce video file size
- Shrink MP4/MKV/MOV under N MB
- Re-encode a clip to a size limit
Example prompts
- “Use the video-compress-to-size skill to compress a single video file to stay under a user-specified max file size using FFmpeg”
- “/video-compress-to-size”
Requirements
- Python 3
Workflow steps
8 steps, taken from the first numbered list in SKILL.md.
- Use the bundled script, not hand-written ffmpeg commands.
- Always pass --max-size from the user (ask if missing). Prefer their unit wording; bare numbers are MB.
- Prefer GPU — do not pass --cpu unless the user asks or GPU encode fails.
- Do not downscale or change fps unless the user asks.
- Sources already ≤ max size are skipped.
- Tell the user where video-compress-to-size/ files are; they swap assets manually when ready.
- Missing Python/FFmpeg → populate .dependency/ per skill-dependency-manager, retry same command.
- Pipeline details: reference.md
What it can do on your machine
Read from SKILL.md and the folder at commit 6394686. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
python
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Video Compress To Size loads about 973 tokens when it runs. Until then it costs about 96 tokens; SKILL.md has 352 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from godot-fun/gai at commit 6394686, republished under its MIT licence (© godot-fun). 352 words, ~973 tokens.
Download SKILL.mdSave it as
.claude/skills/video-compress-to-size/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- video-compress-to-size
- description
- Compresses a single video file to stay under a user-specified max file size using FFmpeg. Prefers GPU encoders (NVENC / AMF / QSV) with VBR bitrate targeting; falls back to CPU two-pass H.264/HEVC. Use when the user wants to compress video, reduce video file size, shrink MP4/MKV/MOV under N MB, GPU encode, NVENC compress, or re-encode a clip to a size limit.
Video Compress To Size
Re-encode a supported video so the output is at or under a given max file size.
Default: probe and use a GPU encoder when available (NVIDIA NVENC → AMD AMF → Intel QSV), single-pass VBR. If no GPU works, fall back to CPU two-pass (libx264 / libx265).
Rules
When this skill applies, read and follow skill-dependency-manager — run scripts as documented, install missing tools into .dependency/.
- Run
compress.pythrough.dependency/python/python.exe. Never use hostpython/ffmpeg. - Never overwrite sources. Outputs go under
video-compress-to-size/. - Use the bundled script — do not hand-write equivalent FFmpeg commands.
- One file per run — pass
--videowith a single file; repeat for each clip in a batch.
Quick Start
.dependency/python/python .ai/video-compress-to-size/compress.py --video path/to/clip.mp4 --max-size 50MBBare numbers mean MB (--max-size 50 ≡ 50MB):
.dependency/python/python .ai/video-compress-to-size/compress.py --video assets/intro.mp4 --max-size 50Example:
assets/video/intro.mp4
→ assets/video/video-compress-to-size/intro.mp4Force CPU (slow, more precise two-pass):
.dependency/python/python .ai/video-compress-to-size/compress.py --video clip.mp4 --max-size 50MB --cpuSize Syntax
| Input | Meaning |
|---|---|
50 / 50MB / 50M | 50 mebibytes (1024² bytes) |
500KB / 500K | 500 kibibytes |
1GB / 1G | 1 gibibyte |
52428800B | exact bytes |
--max-size is required.
Format Defaults
| Setting | Default | Notes |
|---|---|---|
| Encoder | GPU first | h264_nvenc → h264_amf → h264_qsv → libx264 |
| HEVC | --hevc | Same order with hevc_* / libx265 |
| Container | .mp4 | Always MP4 |
| Audio | AAC 128k | Lowered automatically on tiny budgets |
| Preset | medium | Mapped (e.g. NVENC p4); override with --preset |
| Already under limit | Skipped | [skip] … (already under limit) |
| Safety margin | GPU ~90% / CPU ~92% | Headroom for mux / VBR overshoot |
Show full SKILL.md (143 more words)Show less
Common Flags
--video · --max-size · -o / --output · --audio-bitrate · --preset · --hevc · --cpu
Custom output path:
.dependency/python/python .ai/video-compress-to-size/compress.py --video clip.mp4 --max-size 50MB -o out/clip.mp4Never overwrite source files. Input must be a single video file (--video), not a directory. Supported inputs: .mp4, .mkv, .mov, .avi, .webm, .wmv, .flv, .m4v, .mpeg, .mpg, .ts, .mts, .m2ts, .3gp, .ogv.
Agent Notes
- Use the bundled script, not hand-written
ffmpegcommands. - Always pass
--max-sizefrom the user (ask if missing). Prefer their unit wording; bare numbers are MB. - Prefer GPU — do not pass
--cpuunless the user asks or GPU encode fails. - Do not downscale or change fps unless the user asks.
- Sources already ≤ max size are skipped.
- Tell the user where
video-compress-to-size/files are; they swap assets manually when ready. - Missing Python/FFmpeg → populate
.dependency/per skill-dependency-manager, retry same command. - Pipeline details: reference.md
Tests
From repo root:
.dependency/python/python .ai/video-compress-to-size/test_compress.pyManual CLI examples: cli/video-compress-to-size.md
© godot-fun, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in .agents/skills/video-compress-to-size of godot-fun/gai.
- SKILL.md
- reference.md
Open the folder on GitHubat commit 6394686
Compare with similar skills
Video Compress To Size next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Video Compress To Size this skillgodot-fun/gai | 183 | — | ~973 | Automated safety check: Pass | MIT | |
| Vox DirectorAlisa0808/vox-director | 2.2k | — | ~5.6k | Automated safety check: Pass | MIT | |
| Ffmpeg Skillkajisho5/ffmpeg-skill | 1.9k | — | ~7.4k | Automated safety check: Pass | MIT | |
| OpenStoryline Install HelperFireRedTeam/FireRed-OpenStoryline | 3.5k | — | ~1.5k | Automated safety check: Notes | Apache-2.0 | |
| Cassette Video EditCassette-Editor/oh-my-cassette | 119 | 1 repos | ~3.4k | Automated safety check: Pass | MIT | |
| Whiteboard Videognipbao/codex-whiteboard-video-skill | 327 | — | ~7.2k | Automated safety check: Notes | MIT |
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Related
Categories
Questions about Video Compress To Size
What does Video Compress To Size do?
Compresses a single video file to stay under a user-specified max file size using FFmpeg. Video Compress To Size is an agent skill from godot-fun/gai. Compresses a single video file to stay under a user-specified max file size using FFmpeg.
When should I use Video Compress To Size?
Video Compress To Size fits situations like: the user wants to compress video; reduce video file size; shrink MP4/MKV/MOV under N MB; re-encode a clip to a size limit.
How do I install Video Compress To Size in Claude Code?
Run `npx skills add godot-fun/gai --skill video-compress-to-size -a claude-code`. Or copy the skill folder (.agents/skills/video-compress-to-size in godot-fun/gai) into .claude/skills/video-compress-to-size in your project. Claude Code loads it when a task matches its description.
How do I install Video Compress To Size in Codex?
Run `npx skills add godot-fun/gai --skill video-compress-to-size -a codex`. Or copy the skill folder (.agents/skills/video-compress-to-size in godot-fun/gai) into .agents/skills/video-compress-to-size in your project. Codex loads it when a task matches its description.
Can I use Video Compress To Size in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add godot-fun/gai --skill video-compress-to-size -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/video-compress-to-size, .gemini/skills/video-compress-to-size, .github/skills/video-compress-to-size and .opencode/skills/video-compress-to-size in your project.
What does Video Compress To Size need to run?
Going by SKILL.md and its folder, Video Compress To Size needs the command-line tools its instructions call (python). Our summary lists: Python 3.
Does Video Compress To Size access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Video Compress To Size safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Video Compress To Size use?
Video Compress To Size is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Video Compress To Size use?
About 973 tokens (SKILL.md is roughly 3.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Video Compress To Size?
Skills that share tags, products or a category with Video Compress To Size: Vox Director (Alisa0808/vox-director, 2.2k stars), Ffmpeg Skill (kajisho5/ffmpeg-skill, 1.9k stars), OpenStoryline Install Helper (FireRedTeam/FireRed-OpenStoryline, 3.5k stars) and Cassette Video Edit (Cassette-Editor/oh-my-cassette, 119 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Video Compress To Size?
godot-fun (a GitHub organization) maintains it in godot-fun/gai, which has 183 GitHub stars. The repository holds 36 skills in this directory. The repository was last updated on October 10, 2026.
Source: godot-fun/gai on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.