allow setting of volume via data-volume

example/example.js

@@ -95,6 +95,7 @@ function load_slide(slide) {
     var video = slide.querySelector('.video')
     if (video) {
         data.video = load_urls(video.dataset)
+        data.videoVolume = video.dataset.volume ? parseFloat(video.dataset.volume) : 1        
         data.container = video
 
         // assumes documents if length > 1
@@ -105,6 +106,7 @@ function load_slide(slide) {
     var audio = slide.querySelector('.audio')
     if (audio) {
         data.audio = audio.dataset.url // audio does not need to be an array
+        data.audioVolume = audio.dataset.volume ? parseFloat(audio.dataset.volume) : 1
         data.audioContainer = audio
         console.log('continue', audio.dataset.continue)
         data.audioContinue = !!audio.dataset.continue
@@ -173,13 +175,15 @@ function start_zoom(data) {
 
 function start_video(data) {
     data.embed.postMessage('options', {
-        'paused': false
+        'paused': false,
+        'volume': data.videoVolume
     })
 }
 
 function start_audio(data) {
     data.audioEmbed.postMessage('options', {
-        'paused': false
+        'paused': false,
+        'volume': data.audioVolume
     })
     activeAudio = data
 }

example/index.html

@@ -10,7 +10,7 @@
     <div class="title">
         At first, three stories from the year 1950 in Bombay
     </div>
-    <div class="audio" data-continue="true" data-url="https://pad.ma/BVF/editor/F#embed"></div>
+    <div class="audio" data-volume="0.4" data-continue="true" data-url="https://pad.ma/BVF/editor/F#embed"></div>
 </div>
 <div class="slide" data-duration="10">
     <div class="title">
@@ -37,7 +37,7 @@
         ></div>
 </div>
 <div class="slide" data-duration="15">
-    <div class="video" data-url_0="https://pad.ma/BVF/editor/F#embed"
+    <div class="video" data-volume="0.9" data-url_0="https://pad.ma/BVF/editor/F#embed"
         ></div>
 
 </div>