mkm3u

#!/bin/bash

# set -x

#
# -f = force writing m3u even if it means overwriting existing
#
skipIfExists=true
if [[ $1 == "-f" ]]; then
	skipIfExists=false
	shift
fi

#
# -h - help
#
if [[ $1 == "-h" ]]; then
	cat <<-EOF
	Usage: $0 [-f] [nn1] [nn2] file.ext [file.ext ...]
	
	Build playlists for the argument files, saving them to "file.m3u". Existing m3u files
	are skpped and not overwritten by default.
	
	    -f   - force overwriting of existing m3u files
	    nn1  - decimal # of seconds to crop off the start of all files
	    nn2  - decomal # of seconds to crop off the end of all files
	EOF
	exit 0
fi

#
# ARG 1: n - number of seconds to chop off the start
#
startChop=0
if [[ $1 =~ ^[0-9]*[0-9]$ ]]; then
	startChop=$1
	shift
fi

#
# ARG 2: n - number of seconds to chop off the end
#
endChop=0
if [[ $1 =~ ^[0-9]*[0-9]$ ]]; then
	endChop=$1
	shift
fi

safe() {
	for i; do
		echo -n "$i" \
		| curl -Gso /dev/null -w %{url_effective} --data-urlencode @- "" \
		| sed -e 's/%20/ /g' \
		| cut -c 3-
	done
}

for i; do
	dur=$(vinfo -e "$i" | awk '{ print $1; }')
	durLessChop="$((dur - endChop))"
	m3u="${i%.???}".m3u
	if $skipIfExists && [ -r "$m3u" ]; then
		echo "Skipping existing $m3u"
		continue
	fi
	safeName="$(echo "$i" | sed -e 's/\[/%5B/g' -e 's/\]/%5D/g')"
	(
		echo "#EXTM3U";
		echo "#EXTVLCOPT:start-time=${startChop}";
		echo "#EXTVLCOPT:stop-time=${durLessChop}";
		echo "${safeName}"
	) > "${m3u}"
	echo "$i -> $m3u"
done