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June 8, 2017 01:36
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Video with Chapter Marker button.
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="UTF-8"> | |
<style> | |
.button { | |
width: 40%; | |
text-align: left; | |
} | |
</style> | |
</head> | |
<body onLoad="initialize()"> | |
<h2>Clojure Programming</h2> | |
<h2 id="chapter1Caption"></h2> | |
<p> | |
<video id="chapter1Video" width="640" height="360" controls> | |
</video> | |
<br/> | |
<div id="chapter1Marks"> | |
</div> | |
</p> | |
<h2 id="chapter2Caption"></h2> | |
<p> | |
<video id="chapter2Video" width="640" height="360" controls> | |
</video> | |
<br/> | |
<div id="chapter2Marks"> | |
</div> | |
</p> | |
<script type="text/javascript"> | |
var chapter1 = { | |
"captionId" : "chapter1Caption", | |
"videoId" : "chapter1Video", | |
"marksId" : "chapter1Marks", | |
"captionText" : "Chapter1 Introduction", | |
"src" : "Chapter1_Introduction.mp4", | |
"marks" : [ | |
[ "00:00:00", "1.1 First"], | |
[ "00:32:29", "1.2 Second"], | |
[ "00:37:03", "1.3 Third"], | |
[ "01:03:24", "1.4 Fourth"], | |
[ "01:36:46", "1.5 Fifth"], | |
[ "01:42:55", ""] | |
] | |
}; | |
var chapter2 = { | |
"captionId" : "chapter2Caption", | |
"videoId" : "chapter2Video", | |
"marksId" : "chapter2Marks", | |
"captionText" : "Chapter2 REPL", | |
"src" : "Chapter2_REPL.mp4", | |
"marks" : [ | |
["00:00:00","2.1 First"], | |
["00:07:55","2.2 Second"], | |
["00:25:13","2.3 Third"], | |
["00:59:04","2.4 Fourth"], | |
["01:01:58", ""] | |
] | |
}; | |
function initialize() { | |
setContents(chapter1); | |
setContents(chapter2); | |
} | |
function setContents(chapterInfo) { | |
setCaption(chapterInfo['captionId'],chapterInfo['captionText']); | |
setSrc(chapterInfo['videoId'], chapterInfo['src']); | |
setMarks(chapterInfo['marksId'], chapterInfo['videoId'], chapterInfo['marks']); | |
} | |
function setCaption(captionId, captionText) { | |
document.getElementById(captionId).innerHTML = captionText; | |
} | |
function setSrc(videoId, src) { | |
document.getElementById(videoId).setAttribute("src",src); | |
} | |
function setMarks(marksId, videoId, marks) { | |
var _marks = []; | |
for (var i = 0; i < marks.length -1; i++) { | |
var startTime = marks[i][0]; | |
var endTime = marks[i+1][0]; | |
var title = marks[i][1]; | |
_marks.push([startTime,endTime,title]); | |
} | |
var marksDiv = document.getElementById(marksId); | |
_marks.forEach(function(val) { | |
var startTime = val[0]; | |
var endTime = val[1]; | |
var title = val[2]; | |
var interval = toHms(toSec(endTime) - toSec(startTime)); | |
var input = document.createElement("input"); | |
input.setAttribute("type","button"); | |
input.setAttribute("class","button"); | |
input.setAttribute("value",title + "[" + interval + "]"); | |
input.setAttribute("onClick","playAt('" + videoId + "','" + startTime + "')"); | |
marksDiv.appendChild(input); | |
var br = document.createElement("br"); | |
marksDiv.appendChild(br); | |
}); | |
} | |
function toHms(sec) { | |
var hour = Math.floor(sec / (60 * 60)); | |
var hRem = sec % (60 * 60); | |
var minute = Math.floor(hRem / 60); | |
var seconds = hRem % 60; | |
var hStr = ("0"+hour).slice(-2) | |
var mStr = ("0"+minute).slice(-2) | |
var sStr = ("0"+seconds).slice(-2) | |
return hStr + ":" + mStr + ":" + sStr; | |
} | |
function toSec(hms) { | |
var regexp = /(\d\d):(\d\d):(\d\d)/; | |
var matched = hms.match(regexp); | |
var hour = Number(matched[1]); | |
var minute = Number(matched[2]); | |
var seconds = Number(matched[3]); | |
return (hour*60*60) + (minute*60) + seconds; | |
} | |
function playAt(id,hms) { | |
document.getElementById(id).currentTime = toSec(hms); | |
} | |
</script> | |
</body> | |
</html> |
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