From b49664621f2a4ecb683a952e4dee86be2258453f Mon Sep 17 00:00:00 2001
From: Razvan Caliman <razvan.caliman@gmail.com>
Date: Thu, 3 Dec 2015 09:43:32 +0000
Subject: [PATCH] add option to mute background videos (updated)

---
 README.md    | 4 ++--
 js/reveal.js | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index cf604773..01f01dc9 100644
--- a/README.md
+++ b/README.md
@@ -448,8 +448,8 @@ Slides are contained within a limited portion of the screen by default to allow
 <section data-background="http://example.com/image.png" data-background-size="100px" data-background-repeat="repeat">
 	<h2>This background image will be sized to 100px and repeated.</h2>
 </section>
-<section data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.webm" data-background-video-loop>
-	<h2>Video. Multiple sources can be defined using a comma separated list. Video will loop when the data-background-video-loop attribute is provided.</h2>
+<section data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.webm" data-background-video-loop data-background-video-muted>
+	<h2>Video. Multiple sources can be defined using a comma separated list. Video will loop when the data-background-video-loop attribute is provided and can be muted with the data-background-video-muted attribute.</h2>
 </section>
 <section data-background-iframe="https://slides.com">
 	<h2>Embeds a web page as a background. Note that the page won't be interactive.</h2>
diff --git a/js/reveal.js b/js/reveal.js
index da1a60ae..e25337e0 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -2873,6 +2873,7 @@
 				var backgroundImage = slide.getAttribute( 'data-background-image' ),
 					backgroundVideo = slide.getAttribute( 'data-background-video' ),
 					backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),
+					backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' ),
 					backgroundIframe = slide.getAttribute( 'data-background-iframe' );
 
 				// Images
@@ -2887,6 +2888,10 @@
 						video.setAttribute( 'loop', '' );
 					}
 
+					if( backgroundVideoMuted ) {
+						video.muted = true;
+					}
+
 					// Support comma separated lists of video sources
 					backgroundVideo.split( ',' ).forEach( function( source ) {
 						video.innerHTML += '<source src="'+ source +'">';