Add new tricks

2 files changed, 11 insertions, 0 deletions

diff --git a/video.md b/video.md
index dddccb0..d885d12 100644
--- a/video.md
+++ b/video.md
@@ -4,3 +4,9 @@
 
     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
diff --git a/vim.md b/vim.md
index c11e771..c69b9c4 100644
--- a/vim.md
+++ b/vim.md
@@ -12,3 +12,8 @@
 | `/`    | `:h /\r`      | search pattern (in this case, `:h \r` also works |
 | `'`    | `:h 'ro'`     | option                                           |
 | `-`    | `:h -r`       | Vim argument (starting Vim)                      |
+
+## Using vim as a hex editor?
+
+    :%!xxd
+    :%!xxd -r