Script to use ffmpeg to watermark a video

watermark.sh

#!/bin/bash
VIDEO="video.mp4"
IMAGE="logo.png"
SIZE=200
OUTPUT="output.mp4"
OFFSET_X=50
OFFSET_Y=50

while getopts v:i:o:s:x:y: option
do case "${option}"
in
  v) VIDEO=${OPTARG};;
  s) SIZE=${OPTARG};;
  i) IMAGE=${OPTARG};;
  o) OUTPUT=${OPTARG};;
  x) OFFSET_X=${OPTARG};;
  y) OFFSET_Y=${OPTARG};;
esac
done

if [ "$#" -lt 1 ]; then 
	echo "$0 usage:"
	echo "  $0 [-v videoInput] [-o videoOutput] [-i image] [-s imageSize] [-x offsetX] [-y offsetY]"
	echo "    -v videInput (default=$VIDEO)"
	echo "    -o videOutput (default=$OUTPUT)"
	echo "    -i Image (Logo) (default=$IMAGE)"
	echo "    -s Image Size (Horizontal) (default=$SIZE)"
	echo "    -x Offset X (default=$OFFSET_X)"
	echo "    -y Offset Y (default=$OFFSET_Y)"
	exit -1
fi
		
FILTER="[1]scale=${SIZE}:-1:[img];[0][img] overlay=main_w-overlay_w-${OFFSET_X}:main_h-overlay_h-${OFFSET_Y}"

ffmpeg -i $VIDEO -i $IMAGE -filter_complex "${FILTER}" $OUTPUT