diff --git a/scripts/common.lib b/scripts/common.lib
index fc68585..4ca8beb 100644
--- a/scripts/common.lib
+++ b/scripts/common.lib
@@ -15,11 +15,64 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-DEF='\e[0m'; BLD='\e[1m'; RED='\e[31m'; GRN='\e[32m'; YLW='\e[33m'; WHT='\e[97m'
+######## Filesystem ########
+readonly DepsDir="$BaseDir/dependencies"
+readonly ScriptsDir="$BaseDir/scripts"
+readonly SettingsDir="$BaseDir/settings"
+readonly OutputDir="$BaseDir/output"
 
-function clean_line () # $1: Fill size
+readonly FramesDir="$OutputDir/frames"
+readonly AudioDir="$OutputDir/audio"
+readonly VideoDir="$OutputDir/video"
+readonly SubtitlesDir="$OutputDir/subtitles"
+readonly ChaptersDir="$OutputDir/chapters"
+readonly AttachmentsDir="$OutputDir/attachments"
+readonly ReleaseDir="$OutputDir/release"
+readonly PreviewDir="$OutputDir/preview"
+
+readonly FramesUpscaledDir="${FramesDir}_upscaled"
+readonly VideoUpscaledDir="${VideoDir}_upscaled"
+
+readonly FormatJson="$OutputDir/format.json"
+readonly StreamsJson="$OutputDir/streams.json"
+readonly ChaptersJson="$OutputDir/chapters.json"
+
+readonly RangesList="$OutputDir/ranges.list"
+
+readonly DepsConf="$SettingsDir/deps.conf"
+readonly Waifu2xConf="$SettingsDir/waifu2x-caffe.conf"
+readonly FfmpegConf="$SettingsDir/ffmpeg.conf"
+readonly RangeGenConf="$SettingsDir/range-gen.conf"
+
+######## Return codes ########
+SUCCESS=0
+OPTION_ERROR=1
+PARAMETER_ERROR=2
+EXTRACT_AUDIO_ERROR=3
+EXTRACT_VIDEO_ERROR=4
+EXTRACT_SUBTITLE_ERROR=5
+EXTRACT_ATTACHMENT_ERROR=6
+UNKNOWN_CODEC_TYPE_ERROR=7
+NO_EXTENSION_FOR_CODEC=8
+CONVERT_TO_FRAMES_ERROR=9
+FILE_READ_ERROR=10
+RANGES_LIST_SYNTAX_ERROR=11
+SETTINGS_ERROR=12
+WAIFU2X_ERROR=13
+MERGE_RELEASE_ERROR=14
+NO_INFO_ERROR=15
+INTERRUPT=16
+CREATE_UPSCALED_VIDEO_ERROR=17
+
+######## Functions ########
+function clean_line ()
 { 
-	printf "\r%$1s\r" ""
+	printf "\r%$(tput cols)s\r" ""
+}
+
+function model_path () # $1: model name
+{
+	echo "$(dirname $(readlink -e $(which waifu2x-caffe-cui)))/models/$1"
 }
 
 function framerate ()
@@ -34,3 +87,87 @@ function framerate ()
 		fi
 	done
 }
+
+function png_num () # $1: String
+{
+	echo "$1" | \
+	sed 's|.png||' | \
+	sed -r 's|0*([1-9][0-9]*)|\1|'
+}
+
+function check_ranges ()
+{
+	local Errors=0
+	local ParamCount=0
+	local LineIndex=0
+	local LastEndFrame=""
+	
+	while read Line
+	do
+		((LineIndex++))
+		local RangeInfo=($Line)
+		local ParamCount=${#RangeInfo[@]}
+		
+		if [[ "$ParamCount" -eq 0 ]]; then
+			continue
+		elif [[ "$ParamCount" -eq 2 ]] || [[ "$ParamCount" -eq 3 ]]; then
+			local StartFrame=$(png_num ${RangeInfo[0]})
+			local EndFrame=$(png_num ${RangeInfo[1]})
+			local NoiseLevel=$(png_num ${RangeInfo[2]})
+		
+			if [[ "$StartFrame" =~ ^[0-9]+$ ]]; then
+				if [[ -n "$LastEndFrame" ]] && [[ $(($LastEndFrame+1)) != $StartFrame ]]; then
+					echo "ERR [$LineIndex]: StartFrame ($StartFrame) doesn't follow the previous one ($LastEndFrame)"
+					((Errors++))
+				fi
+			else
+				echo "ERR [$LineIndex]: StartFrame $StartFrame is not valid integer"
+				((Errors++))
+			fi
+				
+			if [[ "$EndFrame" =~ ^[0-9]+$ ]]; then
+				LastEndFrame="$EndFrame"
+			else
+				LastEndFrame=""
+				echo "ERR [$LineIndex]: EndFrame $EndFrame is not valid integer"
+				((Errors++))
+			fi
+			if [[ "$NoiseLevel" =~ ^[0-9]+$ ]]; then
+				if [[ "$NoiseLevel" -lt 0 ]] || [[ "$NoiseLevel" -gt 3 ]]; then
+					echo "ERR [$LineIndex]: NoiseLevel $NoiseLevel incorrect value (should be in the range 0-3)"
+					((Errors++))
+				fi
+			elif [[ -n "$NoiseLevel" ]]; then
+				echo "ERR [$LineIndex]: NoiseLevel $NoiseLevel is not valid integer"
+				((Errors++))
+			fi
+		else
+			echo "ERR [$LineIndex]: $ParamCount parameters received (2 or 3 expected)"
+			((Errors++))
+		fi
+	done < <(cat "$RangesList"; echo) # make bash not skip the last line (if there is no empty line at the end)
+	if [[ "$Errors" -gt 0 ]]; then
+		echo "Ranges list syntax: $Errors errors"
+	fi
+	return "$Errors"
+}
+
+######## Includes ########
+source "$DepsConf"
+
+######## Initialization ########
+if [[ -n "$Waifu2xCaffeDir" ]]; then
+	PATH="$PATH:$(readlink -e $Waifu2xCaffeDir)"
+fi
+if [[ -n "$MkvToolNixDir" ]]; then
+	PATH="$PATH:$(readlink -e $MkvToolNixDir)"
+fi
+if [[ -n "$FfmpegDir" ]]; then
+	PATH="$PATH:$(readlink -e $FfmpegDir)"
+fi
+
+if [[ -t 2 ]] && [[ -z "${NO_COLOR-}" ]] && [[ "${TERM-}" != "dumb" ]]; then
+	DEF='\e[0m'; BLD='\e[1m'; RED='\e[31m'; GRN='\e[32m'; YLW='\e[33m'; WHT='\e[97m'
+else
+	DEF=''; BLD=''; RED=''; GRN=''; YLW=''; WHT=''
+fi
diff --git a/scripts/extract.sh b/scripts/extract.sh
index f221537..6a1eb8a 100644
--- a/scripts/extract.sh
+++ b/scripts/extract.sh
@@ -36,12 +36,13 @@ function extract_attachments ()
 {
 	pushd "$AttachmentsDir"
 	
-	ffmpeg -hide_banner -dump_attachment:t "" -i "$InputFile"
-	
-	# There is no error checking,
+	# Disable error checking
 	# because ffmpeg always throws an error:
 	# "At least one output file must be specified",
 	# although it successfully saves attachments.
+	set +e
+	ffmpeg -hide_banner -dump_attachment:t "" -i "$InputFile"
+	set -e
 	
 	popd
 }
diff --git a/scripts/frames.sh b/scripts/frames.sh
index 3548668..7b729f3 100644
--- a/scripts/frames.sh
+++ b/scripts/frames.sh
@@ -17,15 +17,6 @@
 
 InputFile=$(find "$VideoDir" -mindepth 1 -maxdepth 1 -type f | head -n 1)
 
-if ! [[ -r "$InputFile" ]]; then
-	echo "Read file error: \"$InputFile\""
-	exit "$FILE_READ_ERROR"
-fi
-
 rm -rf "$FramesDir"; mkdir -p "$FramesDir"
 	
 ffmpeg -hide_banner -i "$InputFile" -r "$(framerate)" -f image2 "$FramesDir/%06d.png"
-
-if [[ "$?" != 0 ]]; then
-	exit "$CONVERT_TO_FRAMES_ERROR"
-fi
diff --git a/scripts/preview.sh b/scripts/preview.sh
new file mode 100644
index 0000000..246a318
--- /dev/null
+++ b/scripts/preview.sh
@@ -0,0 +1,121 @@
+#!/bin/bash
+
+# This file is part of video2d-2x.
+#
+# video2d-2x is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+source "$Waifu2xConf"
+
+readonly TmpFramesSrcDir="${PreviewDir}_tmpsrc"
+readonly TmpFramesOutDir="${PreviewDir}_tmpout"
+
+if ! [[ -r "$RangesList" ]]; then
+	echo "Read file error: \"$RangesList\""
+	exit "$FILE_READ_ERROR"
+fi
+
+if ! check_ranges; then
+	exit "$RANGES_LIST_SYNTAX_ERROR"
+fi
+
+rm -rf "$PreviewDir" "$TmpFramesSrcDir" "$TmpFramesOutDir"
+mkdir -p "$PreviewDir" "$TmpFramesSrcDir" "$TmpFramesOutDir"
+
+# Prepare frames
+CopyList=""
+while read Line
+do
+	if [[ -z "$Line" ]]; then
+		continue
+	fi
+	
+	RangeInfo=($Line)
+	StartFrame=$(png_num ${RangeInfo[0]})
+	EndFrame=$(png_num ${RangeInfo[1]})
+	TargetFrame=$((StartFrame + (EndFrame - StartFrame)/2))
+	
+	CopyList+="$(printf "%06d" $TargetFrame).png "
+done < <(cat "$RangesList"; echo) # make bash not skip the last line (if there is no empty line at the end)
+
+pushd "$FramesDir" > /dev/null
+cp -f $CopyList "$TmpFramesSrcDir"
+popd > /dev/null
+
+# Upscale (scale)
+if [[ "$ScaleRatio" -ne 1 ]]; then
+	echo "Scale"
+	waifu2x-caffe-cui \
+		--mode "scale" \
+		--scale_ratio "$ScaleRatio" \
+		--output_depth "$OutputDepth" \
+		--tta "$TtaMode" \
+		--gpu "$GpuNum" \
+		--process "$Process" \
+		--crop_size "$CropSize" \
+		--batch_size "$BatchSize" \
+		--model_dir "$(model_path $Model)" \
+		--input_path "$TmpFramesSrcDir" \
+		--output_path "$TmpFramesOutDir" \
+	> /dev/null
+	
+	echo "Copy"
+	pushd "$TmpFramesOutDir" > /dev/null
+	while read Filename 
+	do
+		NewFilename=$(echo "$Filename" | sed "s|.png|_scale${ScaleRatio}.png|")
+		mv "$Filename" "$PreviewDir/$NewFilename"
+	done < <(find "$TmpFramesOutDir" -type f -name '*.png' -printf "%f\n")
+	popd > /dev/null
+fi
+
+# Upscale (noise_scale)
+for NoiseLevel in 0 1 2 3
+do
+	if [[ "$ScaleRatio" -eq 1 ]]; then
+		UpscaleMode="noise"
+	else
+		UpscaleMode="noise_scale"
+	fi
+
+	echo "$UpscaleMode $NoiseLevel"
+	waifu2x-caffe-cui \
+		--mode "$UpscaleMode" \
+		--scale_ratio "$ScaleRatio" \
+		--output_depth "$OutputDepth" \
+		--noise_level "$NoiseLevel" \
+		--tta "$TtaMode" \
+		--gpu "$GpuNum" \
+		--process "$Process" \
+		--crop_size "$CropSize" \
+		--batch_size "$BatchSize" \
+		--model_dir "$(model_path $Model)" \
+		--input_path "$TmpFramesSrcDir" \
+		--output_path "$TmpFramesOutDir" \
+	> /dev/null
+	
+	echo "Copy"
+	pushd "$TmpFramesOutDir" > /dev/null
+	while read Filename 
+	do
+		NewFilename=$(echo "$Filename" | sed "s|.png|_scale${ScaleRatio}_noise${NoiseLevel}.png|")
+		mv "$Filename" "$PreviewDir/$NewFilename"
+	done < <(find "$TmpFramesOutDir" -type f -name '*.png' -printf "%f\n")
+	popd > /dev/null
+done
+
+pushd "$TmpFramesSrcDir" > /dev/null
+mv *.png "$PreviewDir"
+popd > /dev/null
+
+rm -rf "$TmpFramesSrcDir" "$TmpFramesOutDir"
\ No newline at end of file
diff --git a/scripts/ranges.sh b/scripts/ranges.sh
index 9c877be..17860ac 100644
--- a/scripts/ranges.sh
+++ b/scripts/ranges.sh
@@ -15,18 +15,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-# TODO: auto-detect ranges
-# compare adjacent frames using the duplicate image search algorithm
-# frames that are unlike each other will be the boundaries of the ranges
-
 # Range list format:
 # START_FRAME END_FRAME NOISE_LEVEL
 # (separate line for each range)
-
-function add_range () # $1: Start frame, $2: End frame, $3: Noise level
-{
-	echo -e "$1\t$2\t$3" >> "$RangesList"
-}
+# (NOISE_LEVEL is optional)
 
 source "$RangeGenConf"
 
diff --git a/scripts/returncodes.lib b/scripts/returncodes.lib
deleted file mode 100644
index 27bc943..0000000
--- a/scripts/returncodes.lib
+++ /dev/null
@@ -1,18 +0,0 @@
-SUCCESS=0
-OPTION_ERROR=1
-PARAMETER_ERROR=2
-EXTRACT_AUDIO_ERROR=3
-EXTRACT_VIDEO_ERROR=4
-EXTRACT_SUBTITLE_ERROR=5
-EXTRACT_ATTACHMENT_ERROR=6
-UNKNOWN_CODEC_TYPE_ERROR=7
-NO_EXTENSION_FOR_CODEC=8
-CONVERT_TO_FRAMES_ERROR=9
-FILE_READ_ERROR=10
-RANGES_LIST_SYNTAX_ERROR=11
-SETTINGS_ERROR=12
-WAIFU2X_ERROR=13
-MERGE_RELEASE_ERROR=14
-NO_INFO_ERROR=15
-INTERRUPT=16
-CREATE_UPSCALED_VIDEO_ERROR=17
diff --git a/scripts/upscale.sh b/scripts/upscale.sh
index 39396b7..f5e7954 100644
--- a/scripts/upscale.sh
+++ b/scripts/upscale.sh
@@ -15,53 +15,38 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+source "$Waifu2xConf"
+
 readonly TmpFramesDir="${FramesDir}_tmp"
-readonly ColumnWidth=8
-readonly RowTemplate="\r%-${ColumnWidth}s%-${ColumnWidth}s%-${ColumnWidth}s%-${ColumnWidth}s\n"
+readonly RowTemplate="\r%-8s%-8s%-12s%-8s%-8s\n"
 
-function create_default_conf ()
+function upscale_mode () # $1: ScaleRatio, $2: NoiseLevel
 {
-	echo "\
-Process=\"cudnn\"\
-GpuNum=\"0\"\
-ScaleRatio=\"3\"\
-OutputDepth=\"16\"\
-Mode=\"noise_scale\"\
-CropSize=\"256\"\
-BatchSize=\"1\"\
-Model=\"upresnet10\"\
-TtaMode=\"0\"\
-" > "$Waifu2xConf"
-}
-
-function to_int () # $1: String
-{
-	echo "$1" | \
-	sed 's|.png||' | \
-	sed -r 's|0*([1-9][0-9]*)|\1|'
-}
-
-function set_range () # $@: Line
-{
-	StartFrame=$(to_int "$1")
-	EndFrame=$(to_int "$2")
-	NoiseLevel=$(to_int "$3")
+	local ScaleRatio="$1"
+	local NoiseLevel="$2"
 	
-	return $#
-}
-
-function model_path () # $1: model name
-{
-	echo "$(dirname $(readlink -e $(which waifu2x-caffe-cui)))/models/$1"
+	if [[ "$ScaleRatio" -ne 1 ]] && [[ -n "$NoiseLevel" ]]; then
+		echo "noise_scale"
+		return 0
+	fi
+	if [[ "$ScaleRatio" -eq 1 ]] && [[ -n "$NoiseLevel" ]]; then
+		echo "noise"
+		return 0
+	fi
+	if [[ "$ScaleRatio" -ne 1 ]] && [[ -z "$NoiseLevel" ]]; then
+		echo "scale"
+		return 0
+	fi
+	return 1
 }
 
 function upscale_images () # $1: InputDir, $2: OutputDir, $3: ProgressBarPID, $4: ParentPID
 {
 	waifu2x-caffe-cui \
+		--mode "$UpscaleMode" \
 		--scale_ratio "$ScaleRatio" \
 		--output_depth "$OutputDepth" \
 		--noise_level "$NoiseLevel" \
-		--mode "$Mode" \
 		--tta "$TtaMode" \
 		--gpu "$GpuNum" \
 		--process "$Process" \
@@ -78,69 +63,16 @@ function upscale_images () # $1: InputDir, $2: OutputDir, $3: ProgressBarPID, $4
 	fi
 }
 
-function check_ranges ()
-{
-	local Errors=0
-	local ParamCount=0
-	local LineIndex=0
-	local LastEndFrame=""
-	
-	while read Line
-	do
-		((LineIndex++))
-		set_range $Line
-		ParamCount=$?
-		if [[ "$ParamCount" -eq 0 ]]; then
-			continue
-		fi
-		if [[ "$ParamCount" -eq 3 ]]; then
-			if [[ "$StartFrame" =~ ^[0-9]+$ ]]; then
-				if [[ -n "$LastEndFrame" ]] && [[ $(($LastEndFrame+1)) != $StartFrame ]]; then
-					echo "ERR [$LineIndex]: StartFrame ($StartFrame) doesn't follow the previous one ($LastEndFrame)"
-					((Errors++))
-				fi
-			else
-				echo "ERR [$LineIndex]: StartFrame $StartFrame is not valid integer"
-				((Errors++))
-			fi
-				
-			if [[ "$EndFrame" =~ ^[0-9]+$ ]]; then
-				LastEndFrame="$EndFrame"
-			else
-				LastEndFrame=""
-				echo "ERR [$LineIndex]: EndFrame $EndFrame is not valid integer"
-				((Errors++))
-			fi
-			if [[ "$NoiseLevel" =~ ^[0-9]+$ ]]; then
-				if [[ "$NoiseLevel" -lt 0 ]] || [[ "$NoiseLevel" -gt 3 ]]; then
-					echo "ERR [$LineIndex]: NoiseLevel $NoiseLevel incorrect value (should be in the range 0-3)"
-					((Errors++))
-				fi
-			else
-				echo "ERR [$LineIndex]: NoiseLevel $NoiseLevel is not valid integer"
-				((Errors++))
-			fi
-		else
-			echo "ERR [$LineIndex]: $ParamCount parameters received (3 expected)"
-			((Errors++))
-		fi
-	done < <(cat "$RangesList"; echo) # make bash not skip the last line (if there is no empty line at the end)
-	if [[ "$Errors" -gt 0 ]]; then
-		echo "Ranges list syntax: $Errors errors"
-	fi
-	return "$Errors"
-}
-
 function progress_bar ()
 {
 	local PreviousUpscaledFrame=""
 	local LastUpscaledFrame=""
-	local Total=$(to_int $LastOriginalFrame)
+	local Total=$(png_num $LastOriginalFrame)
 	while [[ "$LastUpscaledFrame" != "$LastOriginalFrame" ]]
 	do
 		LastUpscaledFrame=$(ls "$FramesUpscaledDir" | sort | tail -n 1)
 		if [[ "$PreviousUpscaledFrame" != "$LastUpscaledFrame" ]]; then
-			local Done=$(to_int $LastUpscaledFrame)
+			local Done=$(png_num $LastUpscaledFrame)
 			printf "\r[%3d%%] %d/%d" "$(($Done*100/$Total))" "$Done" "$Total"
 			PreviousUpscaledFrame="$LastUpscaledFrame"
 		fi
@@ -148,12 +80,11 @@ function progress_bar ()
 	done
 }
 
-if ! [[ -e "$Waifu2xConf" ]]; then
-	create_default_conf
+if ! [[ -r "$RangesList" ]]; then
+	echo "Read file error: \"$RangesList\""
+	exit "$FILE_READ_ERROR"
 fi
 
-source "$Waifu2xConf"
-
 if ! check_ranges; then
 	exit "$RANGES_LIST_SYNTAX_ERROR"
 fi
@@ -161,11 +92,6 @@ fi
 rm -rf "$TmpFramesDir"
 mkdir -p "$FramesUpscaledDir"
 
-if ! [[ -r "$RangesList" ]]; then
-	echo "Read file error: \"$RangesList\""
-	exit "$FILE_READ_ERROR"
-fi
-
 LastOriginalFrame=$(ls "$FramesDir" | sort | tail -n 1)
 LastUpscaledFrame=$(ls "$FramesUpscaledDir" | sort | tail -n 1)
 
@@ -174,30 +100,43 @@ if [[ "$LastUpscaledFrame" == "$LastOriginalFrame" ]]; then
 	exit "$SUCCESS"
 fi
 
-LastUpscaledFrame=$(to_int "$LastUpscaledFrame")
-echo "$WIDTH"
-printf "${BLD}$RowTemplate${DEF}" "START" "END" "NOISE" "ACTION"
+LastUpscaledFrame=$(png_num "$LastUpscaledFrame")
+
+printf "${BLD}$RowTemplate${DEF}" "START" "END" "MODE" "NOISE" "ACTION"
 while read Line
 do
 	if [[ -z "$Line" ]]; then
 		continue
 	fi
 	
-	set_range $Line
-	clean_line "$COLUMNS"
+	RangeInfo=($Line)
+	StartFrame=$(png_num ${RangeInfo[0]})
+	EndFrame=$(png_num ${RangeInfo[1]})
+	NoiseLevel=$(png_num ${RangeInfo[2]})
+
+	UpscaleMode=$(upscale_mode "$ScaleRatio" "$NoiseLevel")
+	
+	if [[ -z "$NoiseLevel" ]]; then
+		NoiseLevel="0"
+		NoiseLevelDisplay="-"
+	else
+		NoiseLevelDisplay="$NoiseLevel"
+	fi
+	
+	clean_line
 	if [[ -n "$LastUpscaledFrame" ]] && [[ "$LastUpscaledFrame" -ge "$EndFrame" ]]; then
-		printf "$RowTemplate" "$StartFrame" "$EndFrame" "$NoiseLevel" "SKIP"
+		printf "$RowTemplate" "$StartFrame" "$EndFrame" "$UpscaleMode" "$NoiseLevelDisplay" "SKIP"
 		continue
 	fi
 	
 	if [[ -n "$LastUpscaledFrame" ]] && [[ "$StartFrame" -lt "$LastUpscaledFrame" ]]; then
-		printf "$RowTemplate" "$StartFrame"        "$(($LastUpscaledFrame-1))" "$NoiseLevel" "SKIP"
-		printf "$RowTemplate" "$LastUpscaledFrame" "$EndFrame"          "$NoiseLevel" "CONTINUE"
+		printf "$RowTemplate" "$StartFrame"        "$(($LastUpscaledFrame-1))" "$UpscaleMode" "$NoiseLevelDisplay" "SKIP"
+		printf "$RowTemplate" "$LastUpscaledFrame" "$EndFrame"                 "$UpscaleMode" "$NoiseLevelDisplay" "CONTINUE"
 		# if waifu2x-caffe was interrupted while saving the file, a corrupted file is saved 
 		# so it's better to start by overwriting the last upscaled file
 		StartFrame="$LastUpscaledFrame"
 	else
-		printf "$RowTemplate" "$StartFrame" "$EndFrame" "$NoiseLevel"
+		printf "$RowTemplate" "$StartFrame" "$EndFrame" "$UpscaleMode" "$NoiseLevelDisplay"
 	fi
 	
 	rm -rf "$TmpFramesDir"
@@ -214,7 +153,7 @@ do
 	cp $CopyList "$TmpFramesDir"
 	popd > /dev/null
 	
-	clean_line "$COLUMNS"
+	clean_line
 	
 	(progress_bar) &
 	ProgressBarPID=$!
diff --git a/scripts/video.sh b/scripts/video.sh
index 637d308..6cfbc57 100644
--- a/scripts/video.sh
+++ b/scripts/video.sh
@@ -41,7 +41,6 @@ function auto_bitrate ()
 	elif [[ -n "$VideoBitrate" ]]; then
 		echo '-b:v' "$VideoBitrate"
 	else
-		echo "You must set ConstantRateFactor or VideoBitrate in ffmpeg.conf"
 		exit "$SETTINGS_ERROR"
 	fi
 }
diff --git a/settings/video2d-2x.conf b/settings/deps.conf
similarity index 100%
rename from settings/video2d-2x.conf
rename to settings/deps.conf
diff --git a/settings/ffmpeg.conf b/settings/ffmpeg.conf
index f4b0f6d..b431d2a 100644
--- a/settings/ffmpeg.conf
+++ b/settings/ffmpeg.conf
@@ -2,5 +2,4 @@ VideoCodec="libx265"
 Preset="slow"
 PixelFormat="yuv420p10le"
 ConstantRateFactor="16"
-VideoBitrate=""
 x265params="limit-sao=1:bframes=8:psy-rd=1:aq-mode=3"
diff --git a/settings/waifu2x-caffe.conf b/settings/waifu2x-caffe.conf
index 3061f36..6ac7259 100644
--- a/settings/waifu2x-caffe.conf
+++ b/settings/waifu2x-caffe.conf
@@ -7,7 +7,6 @@ Process="cudnn"
 GpuNum="0"
 ScaleRatio="3"
 OutputDepth="16"
-Mode="noise_scale"
 CropSize="256"
 BatchSize="1"
 Model="upresnet10"
diff --git a/video2d-2x b/video2d-2x
index 88942c5..4b62c6b 100644
--- a/video2d-2x
+++ b/video2d-2x
@@ -19,41 +19,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+set -Eeuo pipefail
+
 readonly ScriptName=$(basename "$0")
-readonly ScriptVersion="0.1"
+readonly ScriptVersion="0.2"
 readonly BaseDir=$(dirname $(readlink -e "$0"))
 
-readonly DepsDir="$BaseDir/dependencies"
-readonly ScriptsDir="$BaseDir/scripts"
-readonly SettingsDir="$BaseDir/settings"
-readonly OutputDir="$BaseDir/output"
-
-readonly FramesDir="$OutputDir/frames"
-readonly AudioDir="$OutputDir/audio"
-readonly VideoDir="$OutputDir/video"
-readonly SubtitlesDir="$OutputDir/subtitles"
-readonly ChaptersDir="$OutputDir/chapters"
-readonly AttachmentsDir="$OutputDir/attachments"
-readonly ReleaseDir="$OutputDir/release"
-
-readonly FramesUpscaledDir="${FramesDir}_upscaled"
-readonly VideoUpscaledDir="${VideoDir}_upscaled"
-
-readonly FormatJson="$OutputDir/format.json"
-readonly StreamsJson="$OutputDir/streams.json"
-readonly ChaptersJson="$OutputDir/chapters.json"
-
-readonly RangesList="$OutputDir/ranges.list"
-
-readonly Video2d2xConf="$SettingsDir/video2d-2x.conf"
-readonly Waifu2xConf="$SettingsDir/waifu2x-caffe.conf"
-readonly FfmpegConf="$SettingsDir/ffmpeg.conf"
-readonly RangeGenConf="$SettingsDir/range-gen.conf"
-
-source "$ScriptsDir/returncodes.lib"
-source "$ScriptsDir/common.lib"
-
-source "$Video2d2xConf"
+source "$BaseDir/scripts/common.lib"
 
 function show_version ()
 {
@@ -73,16 +45,6 @@ function show_help ()
 	echo "    -h, --help            show help"
 }
 
-if [[ -n "$Waifu2xCaffeDir" ]]; then
-	PATH="$PATH:$(readlink -e $Waifu2xCaffeDir)"
-fi
-if [[ -n "$MkvToolNixDir" ]]; then
-	PATH="$PATH:$(readlink -e $MkvToolNixDir)"
-fi
-if [[ -n "$FfmpegDir" ]]; then
-	PATH="$PATH:$(readlink -e $FfmpegDir)"
-fi
-
 if [[ $# -eq 0 ]]; then show_help; exit 0; fi
 case $1 in
 	  -h|--help    ) show_help                                ;;
@@ -90,6 +52,7 @@ case $1 in
 	  -e|--extract ) shift; source "$ScriptsDir/extract.sh"   ;;
 	  -f|--frames  ) shift; source "$ScriptsDir/frames.sh"    ;;
 	  -r|--ranges  ) shift; source "$ScriptsDir/ranges.sh"    ;;
+	  -p|--preview ) shift; source "$ScriptsDir/preview.sh"   ;;
 	  -u|--upscale ) shift; source "$ScriptsDir/upscale.sh"   ;;
 	  -v|--video   ) shift; source "$ScriptsDir/video.sh"     ;;
 	  -m|--merge   ) shift; source "$ScriptsDir/merge.sh"     ;;