Resize videos keeping the aspect ratio (shows black bar padding where needed)
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#!/bin/bash | |
input="input.mp4" | |
output="output.mp4" | |
color="black" | |
while getopts ":i:o:w:h:c:" opt; do | |
case $opt in | |
i) input="$OPTARG" | |
;; | |
o) output="$OPTARG" | |
;; | |
w) width="$OPTARG" | |
;; | |
h) height="$OPTARG" | |
;; | |
c) color="$OPTARG" | |
;; | |
\?) echo "Invalid option -$OPTARG" >&2 | |
;; | |
esac | |
done | |
ffmpeg -i $input -vf "scale=w=${width}:h=${height}:force_original_aspect_ratio=decrease,pad=${width}:${height}:(ow-iw)/2:(oh-ih)/2:color=${color}" $output |
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My main usage was for resizing iOS captures for the app store previews:
Usage: