Get this effect
Switch to Code in your Claude Desktop App
Install the skill (once)
Show the prompt
Install the Recharm video effects skill: download https://recharm-growth-staging.s3.us-east-2.amazonaws.com/website/downloads/recharm-video-effects.zip and unzip it into ~/.claude/skillsAsk for the effect
Make a split screen from top.mp4 and bottom.mp4
Several videos, several effects, one ask
Put your clips in the folder, mention them with @, and ask for everything at once. Claude runs one tested script after another on each clip, then joins them.
Add a split screen to @clip1.mp4, put a sale badge on @clip2.mp4, give @clip3.mp4 a VHS look, then join all three with crossfades.
In other editors
From each editor’s own help pages, in our words. We haven’t run these ourselves.
Built in: stacked clips · desktop
- Import both videos and stack them on the timeline, one above the other.
- Trim the longer clip to match the shorter one.
- Select the second clip, drag its corners to shrink it, and position it.
- Repeat for the first clip, placing it at the bottom.
Source: How to Put Two Videos Side by Side | A Complete Guide (CapCut), checked October 22, 2026.
Built in: Split Screen · web
- Upload both clips to the editor.
- Drag the clips onto the timeline, one above the other, so they play together.
- Select each video, crop it, and place it where you want on screen.
- Click Export and download the video.
Source: Split Screen Video Editor (VEED), checked October 22, 2026.
Without the skill
Don’t want to install the skill? Paste this prompt into Claude Code and Claude writes the command itself.
Show the prompt
Stack top.mp4 above bottom.mp4 in one vertical video the same size as top.mp4. Each clip fills its half, cropped from the center. Use top.mp4's audio. Use ffmpeg and save it as output.mp4.Run it without Claude
This is the exact command we tested. Save it as split-screen.sh and run:
sh split-screen.sh top.mp4 bottom.mp4 output.mp4Show the command
#!/bin/sh
# Split screen: two clips stacked, one on the top half and one on the bottom, each cropped to fill its half.
# Usage: sh split-screen.sh top.mp4 bottom.mp4 output.mp4
set -e
TOP="$1"; BOTTOM="$2"; OUT="$3"
SIZE=$(ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 "$TOP")
W=${SIZE%x*}; H=${SIZE#*x}; HALF=$((H / 2))
ffmpeg -y -i "$TOP" -i "$BOTTOM" -filter_complex "\
[0:v]scale=$W:$HALF:force_original_aspect_ratio=increase,crop=$W:$HALF,setsar=1[t];\
[1:v]scale=$W:$HALF:force_original_aspect_ratio=increase,crop=$W:$HALF,setsar=1[b];\
[t][b]vstack,format=yuv420p[v]" \
-map "[v]" -map "0:a?" -shortest -c:v libx264 -crf 18 -c:a copy "$OUT"
