lacking watermakr and thumbnail

script.sh

@@ -0,0 +1,14 @@
+#!/bin/zsh
+video=$1
+music=$2
+
+stopDur=5
+
+videoLength=$(($(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $video)))
+musicLength=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $music)
+
+length=$(($(($musicLength-$stopDur)) / $videoLength))
+
+echo $length
+
+ffmpeg -i $video -i $music -map 0:v -map 1:a -filter:v "setpts=$length*PTS,tpad=stop_mode=clone:stop_duration=$stopDur" -af "afade=t=out:st=28:d=3" -y $video-fst.mp4