diff --git a/groff/math.tmac b/groff/math.tmac
index 607b88d..c75ecff 100644
--- a/groff/math.tmac
+++ b/groff/math.tmac
@@ -19,7 +19,7 @@ define ok '{ \[OK] }'
 define in '{ \[mo] }'
 define deg '{ \[de] }'
 define vel '{ roman v }'
-define freq '{ italic v }'
+define freq '{ nu }'
 define and '{ \[AN] }'
 define grad '{ \[gr] }'
 define aleph '{ \[Ah] }'
diff --git a/picom/picom.conf b/picom/picom.conf
new file mode 100644
index 0000000..9109f6e
--- /dev/null
+++ b/picom/picom.conf
@@ -0,0 +1,15 @@
+glx-copy-from-front = false;
+glx-no-stencil = true;
+backend = "glx";
+
+fade-out-step = 0.15;
+fade-in-step = 0.15;
+fading = true;
+
+blur-method = "dual_kawase";
+blur-strength = 4;
+
+opacity-rule = [
+    "85:class_g = 'st-256color'",
+    "90:class_g = 'dmenu'"
+];
diff --git a/scripts/subtitle b/scripts/subtitle
new file mode 100755
index 0000000..9e82ac8
--- /dev/null
+++ b/scripts/subtitle
@@ -0,0 +1,15 @@
+#!/bin/sh
+video="$(find ./ -name '*.mp4')"
+
+for sub in *.srt ; do
+    subs="$(printf '%s -i %s' "$subs" "$sub")"
+done
+
+i=0
+for sub in *.srt ; do
+    printf 'Metadata (code,name e.g: eng,English) for \033[1m%s\033[0m: ' "$sub" && read -r lang
+    meta="$(printf '%s -map "%d:0" "-metadata:s:s:%d" "language=%s" "-metadata:s:s:%d" "handler_name=%s" "-metadata:s:s:%d" "title=%s"' "$meta" "$((i+1))" "$i" "${lang%%,*}" "$i" "${lang##*,}" "$i" "${lang##*,}" )"
+    i=$((i+1))
+done
+
+printf '\n\033[1mCommand:\033[0m\nffmpeg -i "%s" %s -c copy -map 0 -dn -map "-0:s" -map "-0:d" %s "%s"\n\n' "$video" "$subs" "$meta" "${video%.*}.mkv"