shaka-player
Version:
DASH/EME video player library
133 lines (116 loc) • 4.13 kB
Plain Text
<html>
<head>
<meta charset="utf-8">
<title>TurtleTube - Offline</title>
<!-- Load the Shaka Player library. -->
<script src="shaka-player.compiled.js"></script>
</head>
<body>
<video id="video"
width="640" height="480"
crossorigin="anonymous"
controls>
Your browser does not support HTML5 video.
</video>
</body>
<script>
var video;
function initPlayer() {
// Install polyfills.
shaka.polyfill.installAll();
// Find the video element.
video = document.getElementById('video');
// Attach the player to the window so that it can be easily debugged.
window.player = new shaka.player.Player(video);
// Listen for errors from the Player.
player.addEventListener('error', function(event) {
console.error(event);
});
}
function initialize() {
if (!window.player)
initPlayer();
}
function chooseTracks(videoSource) {
var ids = [];
var videoTracks = videoSource.getVideoTracks();
if (videoTracks.length) {
videoTracks.sort(shaka.player.VideoTrack.compare);
// Choosing the smallest track.
var track = videoTracks[0];
ids.push(track.id);
}
var audioTracks = videoSource.getAudioTracks();
if (audioTracks.length) {
// The video source gives you the preferred language first.
// Remove any tracks from other languages first.
var lang = audioTracks[0].lang;
audioTracks = audioTracks.filter(function(track) {
return track.lang == lang;
});
// From what's left, choose the middle stream. If we have high, medium,
// and low quality audio, this is medium. If we only have high and low,
// this is high.
var index = Math.floor(audioTracks.length / 2);
ids.push(audioTracks[index].id);
}
// Return IDs of chosen tracks.
return Promise.resolve(ids);
}
function storeContent() {
// Construct an OfflineVideoSource.
var offlineSource = new shaka.player.OfflineVideoSource(
null, // groupId, not used when storing content.
null); // estimator, optional parameter.
// Listen for progress events from the OfflineVideoSource.
offlineSource.addEventListener('progress', function(event) {
// Percentage complete is the detail field of the event.
console.log(
'Content storage is ' + event.detail.toFixed(2) + '% complete.');
});
// Store content from MPD url.
var mpdUrl = 'https://turtle-tube.appspot.com/t/t2/dash.mpd';
var preferredLanguage = 'en-US';
return offlineSource.store(
mpdUrl,
preferredLanguage,
null, // interpretContentProtection, not needed for clear content.
chooseTracks.bind(null, offlineSource)
).then(
function(groupId) {
window.groupId = groupId;
console.log('Stored content under group ID ' + groupId);
}
);
}
function playOfflineContent() {
// Construct an OfflineVideoSource and load with player.
var offlineSource =
new shaka.player.OfflineVideoSource(window.groupId, null);
return window.player.load(offlineSource).then(
function() {
video.play();
console.log('Offline content with group ID ' + window.groupId +
' ready for playback.');
});
}
function deleteOfflineContent() {
var offlineSource =
new shaka.player.OfflineVideoSource(window.groupId, null);
return offlineSource.deleteGroup().then(
function() {
console.log('Offline content with group ID ' + window.groupId +
' successfully deleted.');
});
}
function test() {
initialize();
storeContent().then(deleteOfflineContent).catch(
function(e) {
console.error(e);
});
}
document.addEventListener('DOMContentLoaded', test);
</script>
</html>