From a73b9397caf50d19175aea3f4b455e184209bedd Mon Sep 17 00:00:00 2001
From: Martin Chrzanowski <martin@celo.org>
Date: Sat, 12 Jan 2019 16:54:39 -0500
Subject: Move all ffmpeg commands to one file

---
 ffmpeg.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'ffmpeg.md')

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
-- 
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