6 th Sept 2006 Podcasting and SMIL Combining the strengths of UMIST and The Victoria University of Manchester Podcasting & SMIL ALT-C 2006 Adrian Stevenson Internet Services University of Manchester Some slides in this presentation are based on original presentations produced by the JISC-funded QA Focus project provided by UKOLN and AHDS
Given at ALT-C 2006 with Brian Kelly and Scott Wilson
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6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Podcasting & SMIL
ALT-C 2006
Adrian StevensonInternet Services
University of Manchester
Some slides in this presentation are based on original presentations produced by the JISC-funded QA Focus project provided by UKOLN and AHDS
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
RSS
• What is RSS?
– “RSS is a format for syndicating news and the content of news-like sites, including major news sites like Wired, news-oriented community sites like Slashdot, and personal weblogs” – from xml.com
• What does RSS stand for?
– Several different views:
• Netscape called it Rich Site Summary (v 0.92)
• W3C felt it should be based on RDF/XML to provide extensibility and called it RDF Site Summary (v 1.0)
• Dave Winer (& others) valued its simplicity and developed an alternative called Really Simple Syndication (v 2.0)
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Audio Processing
• Editing – pauses, coughs
• Equalisation
• Amplification - normalisation
• Pitch change
• Volume Compression
• Filtering
– Noise reduction (Steinberg Cleanup)
• File Compression (typically to mp3)
Creating a Podcast (2)Early adopters approach – copy & edit an existing RSS file
<item><title>Podcast 1 For IWMW 2006</title><link>http://www.ukoln.ac.uk/…podcasts/podcast-iwmw-2006-01.mp3</link><guid>http://www.ukoln.ac.uk/…/podcasts/#podcast-01</guid><description>This introductory Podcast describes what a Podcast is and ….( 2.5 minute long MP3 recording, ~1.6 MB).</description><enclosure url="http://www.ukoln.ac.uk/…/podcasts/podcast-iwmw-2005-01.mp3" length="1575770" type="audio/mpeg"/><pubDate>Sun, 12 Jun 2006 ...</pubDate></item>
<channel><title>IWMW 2006 Podcasts</title><link>http://www.ukoln.ac.uk/web-focus/events/podcasts/podcasts.xml</link><description>Podcasts About IWMW 2006</description><language>en-gb</language><copyright>Creative Commons - Attribution and Share-alike</copyright><pubDate>Wed, 15 Jun 2006 10:00:00 GMT</pubDate>
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Creating a Podcast (3)Some software now available
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Podcasting Usage Scenarios
• Podcasting is not a replacement for the ‘real thing’ – the live lecture theatre experience
• But it means you can …
– access lectures, conference presentations etc. after the event – Stanford ITunes. Some examples now in the UK.
– Provide some support in case of problems (e.g. couldn't attend talk), conflicts (parallel sessions), …
– Provide a 'taster', helps in marketing, addresses additional areas (e.g. social activities), …
– Keep informed of developments elsewhere
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
SMIL
• W3C Specification
– ‘Synchronized Multimedia Integration Language’
• SMIL presentations can integrate audio and video with images, text or other media type
• Syntax and structure similar to HTML
– SMIL 2.1 released Dec 05
– SMIL 1.0 released 1998
• Examples
– Customers, Suppliers and the Need for Partnerships – Stephen Emmott
– State of the Web 2005 – Molly Holzschlag
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Creating a SMIL presentation
• Record and process audio
• Create the image files
– Assuming based on a Powerpoint presentation
• Write SMIL code
• Make SMIL code accessible
• Add other optional features
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Accessibility
• ‘alt’ and ‘longdesc’ text attributes
<body>
<par>
<audio src="emmott/emmott.mp3" alt=“recording of a talk by Stephen Emmott called Customers, Suppliers, and the Need for Partnerships" longdesc="emmott/emmott.txt"/>
<img id="image_1" src="emmott/Slide1.jpg" region="main" begin="0" alt="Customers, Suppliers, and the Need for Partnerships title slide"/>
<img id="image_2" src="emmott/Slide2.jpg" region="main" begin="1:25" alt="Copyright and credits slide"/>
….
6th Sept 2006 Podcasting and SMILCombining the strengths of UMIST andThe Victoria University of Manchester
Accessibility
• Captioning
– Makes SMIL accessible to those with difficulty or who are unable to hear
– SMIL audio track improves accessibility for those with visual impairments
– Requires a transcription of the spoken content (plus any important non-spoken sound), and associated a timestamp