Universal Media Player

Terrill Thompsontft@uw.edu

@terrillthompsonhttp://terrillthompson.com/ump

(UMP)

Media Players Then<object id="mediaPlayer1" width="180" height="50" classid="CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95" codebase=http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701 type="application/x-oleobject"standby="Loading Microsoft Windows Media Player components..." ><param name="fileName" value="take5.wmv"><param name="animationatStart" value="true"><param name="transparentatStart" value="true"><param name="autoStart" value="false"><param name="showControls" value="true"><param name ="ShowAudioControls"value="true"> <param name="ShowStatusBar" value="true"><param name="loop" value="false"><embed type="application/x-mplayer2"pluginspage="http://microsoft.com/windows/mediaplayer/en/download/"id="mediaPlayer" name="mediaPlayer" displaysize="4" autosize="-1" bgcolor="darkblue" showcontrols="true" showtracker="-1" showdisplay="0" showstatusbar="-1" videoborder3d="-1" width="420" height="380"src="take5.wmv" autostart="false" loop="false"></embed></object>

Media Players Now

<audio src="myaudio.mp3" controls></audio>

What if your browser doesn't support MP3?

<audio controls> <source src="myaudio.mp3"> <source src="myaudio.ogg"></audio>

Your browser doesn't support HTML5 <audio>?

<audio controls> <source src="myaudio.mp3"> <source src="myaudio.ogg"> <!-- fallback content goes here --></audio>

The Same Code Works for Video

<video controls> <source src="myvideo.mp4"> <source src="myvideo.ogv"> <!-- fallback content goes here --></video>

The player works well in IE9 and higher

• Tab gives the player focus• Space toggles play/pause• Right/left arrows fast forward/rewind• Up/down arrows control volume• Controls have informative labels for screen

reader users

It sort of works in Firefox

• Tab gives the player focus• Space and arrow keys work as they do in IE,

but not if screen reader is running• Screen readers announce controls – Very high precision on the progress bar

It sort of works in Chrome and Safari

• Tab gives the player focus, but then what? • Player doesn't respond to keyboard commands

Accessibility of the player controls are the same for audio and video

But HTML5 video has other cool features too...

Can't hear the audio?

<video controls> <source src="myvideo.mp4"> <source src="myvideo.webm"> <track kind="captions" src="mycaps.vtt"> <!-- fallback content goes here --></video>

WebVTT Format

• Stands for "Web Video Text Tracks" • Based on SubRip format (*.srt)• The draft spec:

http://dev.w3.org/html5/webvtt

WebVTT ExampleWEBVTT

00:00:09.165 --> 00:00:10.792You want these people.

00:00:10.792 --> 00:00:13.759They order your products, sign up for your services,

00:00:13.759 --> 00:00:16.627enroll in your classes, read your opinions,

00:00:16.627 --> 00:00:18.561and watch your videos.

Internet Explorer 10+ has good support for captions + accessible controls

Captions in Other Browsers

• Firefox will support captions in 28.0 (current version is 27.0.1)

• Chrome, Safari, and Opera support captions but they all have issues:http://terrillthompson.com/blog/366

Can't see the visual content?

<video controls> <source src="myvideo.mp4"> <source src="myvideo.webm"> <track kind="captions" src="mycaps.vtt"> <track kind="descriptions" src="mydesc.vtt"> <!-- fallback content goes here --></video>

Another WebVTT ExampleWEBVTT

00:00:02.000 --> 00:00:06.000A blue circle has pairs of arching pairs inside.Underneath, DO-IT.

00:00:06.000 --> 00:00:16.000Words appear in a white box:World Wide Access.

00:00:37.000 --> 00:00:47.000Terrill Thompson:

Browser Support for Description

Summary

• Browsers have some support for accessible HTML5 media, but it's still less than ideal

• HTML5 media has a robust API, so we can make our own player...

Resources

• UMPhttp://terrillthompson.com/ump

• My Blog http://terrillthompson.com

• These Slideshttp://staff.washington.edu/tft

• DO-IT Video http://uw.edu/doit/video