reel-export
Turn any horizontal or square motion video into a 1080 x 1920 Instagram Reel or TikTok that uploads cleanly. Headline and logos inside the safe zone, H.264, yuv420p, limited colour range, bt709, a silent audio track when there is no sound, and an ffprobe check before upload. Use when someone says "make this a reel", "vertical version", "export for Instagram", "TikTok version", "9:16 cut", "reel export" or has a 16:9 or 4:5 video that needs to go on a vertical feed.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/charlie947/motion-graphics-skills --skill reel-export- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads reel-export automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Reel export
Most motion is built wide. This turns it into a vertical file with a hook on top that the apps accept without washing out the colours.
Before you start: read brand.md and MOTION.md if they exist. If not, run brand-intake first, or ask for hex codes, a font and a logo file. Never call a result on-brand without them.
Step 1: Ask for four things, then wait
- The video. Any MP4, any size.
- The headline, two short lines, word for word. It is the hook people read with the sound off.
- Logos, as attached files, if the video names a product or company.
- The background colour around the video. Default: near-black
#0B0B0F.
Step 2: The safe zone
The app draws its own buttons, caption and profile over the edges of a Reel. Keep every word and logo:
- between y 360 and y 1420 (nothing in the bottom 500px)
- out of the right 120px
Put the headline at the top of that zone, then the video under it. A 16:9 video scaled to 1080 wide is 608 tall, so it sits well at y 660.
Step 3: Build the overlay, then encode
Build a transparent 1080 x 1920 overlay.png in HTML with the headline and any logos, and screenshot it. Text you can style beats text burned in by ffmpeg. Then:
ffmpeg -y -i in.mp4 -loop 1 -i overlay.png -f lavfi -i anullsrc=r=48000:cl=stereo -filter_complex "color=c=0x0B0B0F:s=1080x1920:r=30[bg];[0:v]fps=30,scale=1080:-2,setsar=1[v];[bg][v]overlay=0:660:shortest=1[o];[o][1:v]overlay=0:0:shortest=1,scale=out_color_matrix=bt709:out_range=tv,format=yuv420p[out]" -map "[out]" -map 2:a -shortest -c:v libx264 -profile:v high -crf 18 -pix_fmt yuv420p -color_range tv -colorspace bt709 -color_primaries bt709 -color_trc bt709 -c:a aac -b:a 128k -movflags +faststart reel.mp4
This adds a silent AAC track. If the video has its own sound, swap -map 2:a for -map 0:a.
Step 4: Check before upload
ffprobe -v error -show_entries stream=codec_type,codec_name,width,height,pix_fmt,color_range,color_space -of compact reel.mp4
Pass means: video h264, 1080 x 1920, yuv420p, color_range=tv, bt709, plus one aac audio stream. If you see hevc or color_range=pc, encode again. Then pull one frame from the middle and look at it at phone size.
What I learned the hard way
- A phone recording is often HEVC and full range. Uploaded as is, it can come out washed out or re-encoded badly. Always export a fresh H.264, limited-range file, including after any edit.
- A logo over footage vanishes on light frames. Put each logo (and its label) on its own dark rounded tile.
- faststart matters. Without
-movflags +faststartthe file cannot start playing until it has fully loaded. - Keep the hook to two lines. Mine were short enough to read in a second: "This Mac launch" / "is 100% code".
FAQ
What does the reel-export skill do?
Turn any horizontal or square motion video into a 1080 x 1920 Instagram Reel or TikTok that uploads cleanly. Headline and logos inside the safe zone, H.264, yuv420p, limited colour range, bt709, a silent audio track when there is no sound, and an ffprobe check before upload. Use when someone says "make this a reel", "vertical version", "export for Instagram", "TikTok version", "9:16 cut", "reel export" or has a 16:9 or 4:5 video that needs to go on a vertical feed.
How do I install reel-export?
Run npx skills add https://github.com/charlie947/motion-graphics-skills --skill reel-export in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/reel-export/ (personal) or .claude/skills/reel-export/ (project).
Which AI agents can use reel-export?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is reel-export safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains reel-export?
It is published by charlie947 in charlie947/motion-graphics-skills. It has 1,565 recorded installs.
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