From 372c6bf8f47ecabfe816b3c1a14e0b480dc2e2a5 Mon Sep 17 00:00:00 2001
From: Mason Chang <mchang@mozilla.com>
Date: Thu, 4 Aug 2016 17:44:20 -0700
Subject: [PATCH] libavformat error

---
 README.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/README.md b/README.md
index 0680dc2fa91..fb215bd510b 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,16 @@ brew install openssl
 brew link --force openssl
 ```
 
+If you get this error:
+``` sh
+"Couldn't find libavformat", do the following:
+
+brew uninstall ffmpeg
+brew install ffmpeg --build-from-source
+./mach clean
+./mach build
+```
+
 If you've already partially compiled servo but forgot to do this step, run ./mach clean, link openssl, and recompile.
 
 On Debian-based Linuxes: