diff --git a/lib/common.sh b/lib/common.sh
index b74dff3..73aeed3 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -142,6 +142,34 @@ bash_basename() {
 	printf '%s\n' "${tmp:-/}"
 }
 
+bash_realpath() {
+	local file=$1
+	local dir
+
+	# If the file is already absolute
+	[[ $file == /* ]] && {
+		printf '%s\n' "$file"
+		return
+	}
+
+	# Otherwise: split into directory + basename
+	dir="$(bash_dirname "${file}")"
+	file="$(bash_basename "${file}")"
+
+	# If no directory component, use current directory
+	if [[ $dir == "$file" ]]; then
+		dir="$PWD"
+	else
+		# Save current dir, move into target dir, capture $PWD, then return
+		local oldpwd="$PWD"
+		cd "$dir" || return 1
+		dir="$PWD"
+		cd "$oldpwd" || return 1
+	fi
+
+	printf '%s/%s\n' "$dir" "$file"
+}
+
 line_contains() {
 	local line="$1"
 	local substr="$2"
diff --git a/lib/encode.sh b/lib/encode.sh
index 23758d8..47f076f 100644
--- a/lib/encode.sh
+++ b/lib/encode.sh
@@ -11,7 +11,8 @@ get_duration() {
 
 get_crop() {
 	local file="$1"
-	local duration="$(get_duration "${file}")"
+	local duration
+	duration="$(get_duration "${file}")" || return 1
 	# don't care about decimal points
 	IFS='.' read -r duration _ <<<"${duration}"
 	# get crop value for first half of input
@@ -48,11 +49,12 @@ get_stream_codec() {
 
 get_file_format() {
 	local file="$1"
-	local probe="$(ffprobe \
+	local probe
+	probe="$(ffprobe \
 		-v error \
 		-show_entries format=format_name \
 		-of default=noprint_wrappers=1:nokey=1 \
-		"${file}")"
+		"${file}")" || return 1
 	if line_contains "${probe}" 'matroska'; then
 		echo mkv
 	else
@@ -88,14 +90,16 @@ get_num_audio_channels() {
 		-show_entries stream=channels \
 		-of default=noprint_wrappers=1:nokey=1 \
 		"${file}"
-
 }
 
 unmap_streams() {
 	local file="$1"
 	local unmapFilter='bin_data|jpeg|png'
 	local unmap=()
-	for stream in $(get_streams "${file}"); do
+	local streamsStr
+	streamsStr="$(get_streams "${file}")" || return 1
+	mapfile -t streams <<<"${streamsStr}" || return 1
+	for stream in "${streams[@]}"; do
 		if [[ "$(get_stream_codec "${file}" "${stream}")" =~ ${unmapFilter} ]]; then
 			unmap+=("-map" "-0:${stream}")
 		fi
@@ -107,9 +111,10 @@ set_audio_bitrate() {
 	local file="$1"
 	local bitrate=()
 	for stream in $(get_audio_streams "${file}"); do
-		local numChannels="$(get_num_audio_channels "${file}" "a:${stream}")"
+		local numChannels codec
+		numChannels="$(get_num_audio_channels "${file}" "a:${stream}")" || return 1
 		local channelBitrate=$((numChannels * 64))
-		local codec="$(get_stream_codec "${file}" "a:${stream}")"
+		codec="$(get_stream_codec "${file}" "a:${stream}")" || return 1
 		if [[ ${codec} == 'opus' ]]; then
 			bitrate+=(
 				"-c:a:${stream}"
@@ -305,7 +310,8 @@ set_encode_opts() {
 
 	# use same container for output
 	if [[ $SAME_CONTAINER == "true" ]]; then
-		local fileFormat="$(get_file_format "${INPUT}")"
+		local fileFormat
+		fileFormat="$(get_file_format "${INPUT}")" || return 1
 		FILE_EXT=''
 		if [[ ${fileFormat} == 'MPEG-4' ]]; then
 			FILE_EXT='mp4'
@@ -351,7 +357,7 @@ gen_encode_script() {
 	)
 	local crop=''
 	if [[ $CROP == "true" ]]; then
-		crop="-vf $(get_crop "${INPUT}")"
+		crop="$(get_crop "${INPUT}")" || return 1
 	fi
 	local videoEncoder='libsvtav1'
 	local ffmpegVersion="$(ffmpeg_version)"
@@ -396,24 +402,30 @@ gen_encode_script() {
 		'-y' '-map' '0'
 	)
 
-	local unmap=($(unmap_streams "${INPUT}"))
+	local unmapStr
+	unmapStr="$(unmap_streams "${INPUT}")" || return 1
+	mapfile -t unmap <<<"${unmapStr}"
 	if [[ ${unmap[*]} != '' ]]; then
 		ffmpegParams+=('${unmap[@]}')
 	fi
 
-	local audioBitrate=($(set_audio_bitrate "${INPUT}"))
+	local audioBitrateStr
+	audioBitrateStr="$(set_audio_bitrate "${INPUT}")" || return 1
+	mapfile -t audioBitrate <<<"${audioBitrateStr}"
 	if [[ ${audioBitrate[*]} != '' ]]; then
 		ffmpegParams+=('${audioBitrate[@]}')
 	fi
 
 	if [[ ${crop} != '' ]]; then
-		ffmpegParams+=('${crop}')
+		ffmpegParams+=('-vf' '${crop}')
 	fi
 
 	ffmpegParams+=(
 		'-c:s' 'copy'
 	)
-	local convertSubs=($(convert_subs "${INPUT}"))
+	local convertSubsStr
+	convertSubsStr="$(convert_subs "${INPUT}")" || return 1
+	mapfile -t convertSubs <<<"${convertSubsStr}"
 	if [[ ${convertSubs[*]} != '' ]]; then
 		ffmpegParams+=('${convertSubs[@]}')
 	fi
diff --git a/main.sh b/main.sh
index 5a867a7..ab716a3 100755
--- a/main.sh
+++ b/main.sh
@@ -1,12 +1,10 @@
 #!/usr/bin/env bash
 
 # set top dir
-relativeRepoRoot="${BASH_SOURCE[0]//'main.sh'/}"
-if [[ -d ${relativeRepoRoot} ]]; then
-	preloadCmd="cd ${relativeRepoRoot} &&"
+if [[ -z ${REPO_DIR} ]]; then
+	thisFile="${BASH_SOURCE[0]}"
+	REPO_DIR="$(dirname "${thisFile}")"
 fi
-REPO_DIR="$(${preloadCmd} echo "$PWD")"
-unset relativeRepoRoot preloadCmd
 
 IGN_DIR="${REPO_DIR}/gitignore"
 TMP_DIR="${IGN_DIR}/tmp"
@@ -37,9 +35,10 @@ src_scripts() {
 		rm "${SCRIPT_DIR}"/*.sh
 		# shellcheck disable=SC2016
 		echo '#!/usr/bin/env bash
-cd "$(dirname "$(readlink -f $0)")/.."
 export FB_RUNNING_AS_SCRIPT=1
-. main.sh || return 1
+thisFile="$(readlink -f "$0")"
+export REPO_DIR="$(cd "$(dirname "${thisFile}")/.." && echo "$PWD")"
+source "${REPO_DIR}/main.sh" || return 1
 scr_name="$(bash_basename $0)"
 cmd="${scr_name//.sh/}"
 if [[ $DEBUG == 1 ]]; then set -x; fi
diff --git a/scripts/entry.sh b/scripts/entry.sh
index 283cc93..4039c36 100755
--- a/scripts/entry.sh
+++ b/scripts/entry.sh
@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
-cd "$(dirname "$(readlink -f $0)")/.."
 export FB_RUNNING_AS_SCRIPT=1
-. main.sh || return 1
+thisFile="$(readlink -f "$0")"
+export REPO_DIR="$(cd "$(dirname "${thisFile}")/.." && echo "$PWD")"
+source "${REPO_DIR}/main.sh" || return 1
 scr_name="$(bash_basename $0)"
 cmd="${scr_name//.sh/}"
 if [[ $DEBUG == 1 ]]; then set -x; fi