#!/bin/sh
def_seconds=5
def_aspect=2

help(){
	cat <<END
Usage: $0 <filename.[png|jpg]>
Options:
	-t n      Number secnods per image              ($def_seconds)
	-s n      n=1 letterbox, n=2 crop               ($def_aspect)
END
	exit 1
}

seconds=$def_seconds
aspect=$def_aspect

while getopts t:s:h name "$@"
do
    case $name in
t)
    seconds=$OPTARG ;;
s)
	aspect=$OPTARG ;;
*)
    help ;;
    esac
done
let shiftind=$OPTIND-1
shift $shiftind

if test "$#" != "1"
then
	help
fi
case $1 in
*.jpg)
    ifilter=jpegtopnm
    input="$1"
    base=`echo $input | sed "s/\.jpg$//"` ;;
*.png)
	ifilter=pngtopnm
	input="$1"
	base=`echo $input | sed "s/\.png$//"` ;;
*)
	help ;;
esac

case $aspect in
1)
	yinfer=PAD ;;
*)
	yinfer=CLIP ;;
esac

$ifilter $input |
ppmtoy4m |
y4mscaler -I sar=1:1 -O infer=${yinfer} -O infer=EXACT \
	-O sar=1:1 -O size=1920x1088 -O chromass=420jpeg |
yuvfps -v0 -ip -s 1:$seconds -r 30000:1001 |
yuv2lav -I0 -b2048 -fa -o "$base".avi