script to convert .3gp file into animated gif

gif.sh

if [ $# -eq 0 ]
then
    echo "argument required"
    exit
fi

wide=`ffmpeg -i $1 2>&1 | grep "DAR 16:9," | wc -l`
long=`ffmpeg -i $1 2>&1 | grep "DAR 9:16," | wc -l`
short=`ffmpeg -i $1 2>&1 | grep "DAR 3:4," | wc -l`
#sd=`ffmpeg -i $1 2>&1 | grep "DAR 4:3," | wc -l`

if [ $wide -eq 1 ]
then
    aspect="480x270"
elif [ $long -eq 1 ]
then
    aspect="270x480"
elif [ $short -eq 1 ]
then
    aspect="300x400"
else
    aspect="400x300"
fi

base=`echo "$1" | sed 's/.3gp//'`
ffmpeg -i $1 -f gif -pix_fmt rgb24 -r 8 -s $aspect $base.gif
mogrify $base.gif