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Rub21/gradientvideo.sh

Forked from coderofsalvation/gradientvideo.sh
Created December 30, 2020 14:02
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add gradient with angle on top of video or image using ffmpeg
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gradientvideo.sh
#!/bin/bash
[[ ! -n $5 ]] && echo "Usage: [ROTATE=90] gradientvideo <input.mp4> <r> <g> <b> <output.mp4>" && exit
set -x
[[ -n $ROTATE ]] && ROTATE=",scale=w=1.5*iw:h=1.5*ih,rotate=angle=$ROTATE"
ffmpeg -i "$1" -filter_complex "[0]split[v0][v1];[v0]format=rgba,geq=r=$2:g=$3:b=$4:a=255*(Y/H)$ROTATE[fg];[v1][fg]overlay=(W-w)/2:(H-h)/2:shortest=1" -q:v 2 "$5"
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