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 video grid from a.mp4 and b.mp4 and c.mp4 and d.mp4 Pixels of border around and between the tiles: 12 Seconds between one tile fading in and the next: 0.25
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 video grid to @clip1.mp4, put a sale badge on @clip2.mp4, give @clip3.mp4 a VHS look, then join all three with crossfades.
Settings you can change
Ask Claude to change any of these, or edit them at the top of the command.
| Setting | Default | What it does |
|---|---|---|
GAP | 12 | Pixels of border around and between the tiles. |
STAGGER | 0.25 | Seconds between one tile fading in and the next. |
FADE | 0.2 | Seconds each tile takes to fade in. |
BOARD | 0x141414 | Color behind the tiles. |
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
Make a 2x2 video grid from four clips: a.mp4 top-left, b.mp4 top-right, c.mp4 bottom-left, d.mp4 bottom-right. The output is 540x960, 30fps and 6 seconds long, on a #141414 near-black background. Each tile is 252x462 pixels, with a 12-pixel border around the outside and 12 pixels between tiles: tiles at x=12 and x=276, y=12 and y=486. Scale each clip to fill its tile and crop the overflow equally from both sides (centered), never stretch it. Each tile fades in from the background over 0.2 seconds: top-left starting at 0s, top-right at 0.25s, bottom-left at 0.5s, bottom-right at 0.75s; until its fade starts a slot shows only the background. All four clips play from their own start at the same time and keep playing to the end. Keep a.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 video-grid.sh and run:
sh video-grid.sh a.mp4 b.mp4 c.mp4 d.mp4 output.mp4Show the command
#!/bin/sh
# Video grid: four clips play at once in a 2x2 grid on a dark board, each tile fading in a beat after the last.
# Usage: sh video-grid.sh top-left.mp4 top-right.mp4 bottom-left.mp4 bottom-right.mp4 output.mp4
# Needs ffmpeg. The output takes the first clip's size, length and sound; each clip fills its tile, cropped from the center.
set -e
A="$1"; B="$2"; C="$3"; D="$4"; OUT="$5"
GAP=12 # dark border round and between the tiles, in pixels
STAGGER=0.25 # seconds between one tile fading in and the next (top-left, top-right, bottom-left, bottom-right)
FADE=0.2 # seconds each tile takes to fade in
BOARD=0x141414 # color behind the tiles (near-black)
SIZE=$(ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 "$A")
W=${SIZE%x*}; H=${SIZE#*x}
TW=$(( (W - 3 * GAP) / 2 / 2 * 2 )); TH=$(( (H - 3 * GAP) / 2 / 2 * 2 )) # tile size, rounded down to even
X2=$((2 * GAP + TW)); Y2=$((2 * GAP + TH))
tile() { # input index -> tile scaled to fill, cropped, fading in at its turn
echo "[$1:v]fps=30,scale=$TW:$TH:force_original_aspect_ratio=increase,crop=$TW:$TH,setsar=1,format=rgba,\
fade=in:st=$(awk "BEGIN { print $1 * $STAGGER }"):d=$FADE:alpha=1[t$1];"
}
ffmpeg -y -i "$A" -i "$B" -i "$C" -i "$D" -filter_complex "\
color=$BOARD:s=${W}x${H}:r=30[board];$(tile 0)$(tile 1)$(tile 2)$(tile 3)\
[board][t0]overlay=$GAP:$GAP:shortest=1[g0];[g0][t1]overlay=$X2:$GAP[g1];\
[g1][t2]overlay=$GAP:$Y2[g2];[g2][t3]overlay=$X2:$Y2,format=yuv420p[v]" \
-map "[v]" -map "0:a" -c:v libx264 -crf 18 -c:a aac "$OUT"
