3 files changed, 16 insertions, 12 deletions
diff --git a/ffmpeg.md b/ffmpeg.md
index 6abed19..28a5730 100644
--- a/ffmpeg.md
+++ b/ffmpeg.md
@@ -1,5 +1,16 @@
 # ffmpeg tricks
 
+## Cut
+
+    ffmpeg -i in.mp4 -codec:v copy -codec:a copy -ss START_TIME -t DURATION out.mp4
+    ffmpeg -ss START_TIME -t DURATION -i in.mp4 -codec:v copy -codec:a copy out.mp4
+
+## Resize
+
+    ffmpeg -i in.mp4 -s 720x480 out.mp4
+    # -1 means to automatically preserve aspect ratio
+    ffmpeg -i in.mp4 -filter:v scale=720:-1 out.mp4
+
 ## Record screen
 
     ffmpeg -f x11grab -s 1920x1080 -i :0.0 out.mkv
diff --git a/find.md b/find.md
new file mode 100644
index 0000000..a8b840a
--- /dev/null
+++ b/find.md
@@ -0,0 +1,5 @@
+# The find Unix utility
+
+## Ignoring directories
+
+    find . -not -ipath "dir/*"
diff --git a/video.md b/video.md
deleted file mode 100644
index d885d12..0000000
--- a/video.md
+++ /dev/null
@@ -1,12 +0,0 @@
-# Video editing
-
-## Cut
-
-    ffmpeg -i in.mp4 -codec:v copy -codec:a copy -ss START_TIME -t DURATION out.mp4
-    ffmpeg -ss START_TIME -t DURATION -i in.mp4 -codec:v copy -codec:a copy out.mp4
-
-## Resize
-
-    ffmpeg -i in.mp4 -s 720x480 out.mp4
-    # -1 means to automatically preserve aspect ratio
-    ffmpeg -i in.mp4 -filter:v scale=720:-1 out.mp4