Successfully reported this slideshow.
Your SlideShare is downloading. ×

Podcasting & SMIL

Upcoming SlideShare
RSS Newsfeeds and Podcasting
RSS Newsfeeds and Podcasting
Loading in …3

Check these out next

1 of 22 Ad
1 of 22 Ad

More Related Content

More from Adrian Stevenson (20)


Podcasting & SMIL

  1. 1. Podcasting & SMIL <ul><li>ALT-C 2006 </li></ul><ul><li>Adrian Stevenson </li></ul><ul><li>Internet Services </li></ul><ul><li>University of Manchester </li></ul><ul><ul><ul><ul><li>Some slides in this presentation are based on original presentations produced by the JISC-funded QA Focus project provided by UKOLN and AHDS </li></ul></ul></ul></ul>
  2. 2. RSS <ul><li>What is RSS? </li></ul><ul><ul><li>“ 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 </li></ul></ul><ul><li>What does RSS stand for? </li></ul><ul><ul><li>Several different views: </li></ul></ul><ul><ul><ul><li>Netscape called it Rich Site Summary (v 0.92) </li></ul></ul></ul><ul><ul><ul><li>W3C felt it should be based on RDF/XML to provide extensibility and called it RDF Site Summary (v 1.0) </li></ul></ul></ul><ul><ul><ul><li>Dave Winer (& others) valued its simplicity and developed an alternative called Really Simple Syndication (v 2.0) </li></ul></ul></ul>
  3. 3. RSS Viewers <ul><li>Ways of accessing RSS feeds: </li></ul><ul><ul><li>Blog – eg. bloglines </li></ul></ul><ul><ul><li>Web pages </li></ul></ul><ul><ul><li>Bookmark interfaces –Mozilla Firefox ‘live’ bookmarks </li></ul></ul><ul><ul><li>Browser plug-ins - Sage </li></ul></ul><ul><ul><li>Email clients - Outlook Express, Mozilla Thunderbird </li></ul></ul><ul><ul><li>Mobile Phone </li></ul></ul>
  4. 4. Podcasting - What is it? <ul><li>RSS and Podcasting: </li></ul><ul><ul><li>Podcasting is an application of RSS 2.0: </li></ul></ul><ul><ul><ul><li>It is simply the syndication of audio, typically mp3 files, instead of text (RSS news feeds) </li></ul></ul></ul><ul><ul><ul><li>You can schedule the download of the mp3 files and listen to them offline e.g. on a portable mp3 player such as an Apple iPod </li></ul></ul></ul><ul><ul><li>Very easy for the end user and relatively easy for the publisher </li></ul></ul><ul><ul><li>Can be difficult to do well –it helps to have some sound recording skills </li></ul></ul><ul><li>Many Podcast directories , BBC </li></ul>
  5. 5. Accessing a Podcast <ul><li>To access a Podcast: </li></ul><ul><li>Install Podcast software e.g. iTunes, Juice, Jager, Blogmatrix, … </li></ul><ul><li>Add the URL of RSS file to the podcast software </li></ul><ul><ul><li>IWMW 2006 </li></ul></ul><ul><ul><li>BBC Film reviews </li></ul></ul><ul><li>Various configuration options are usually available </li></ul><ul><ul><li>Scheduling for downloads </li></ul></ul><ul><ul><li>The download location of mp3 file </li></ul></ul><ul><li>Transfer files to portable mp3 player such as an iPod (using e.g. iTunes, Winamp) </li></ul>
  6. 6. Podcasting and [e-]Learning <ul><li>The University of Bath provides a highly-regarded e-learning Blog, Auricle </li></ul><ul><ul><li> </li></ul></ul><ul><li>Auricle has now added some Podcasts: </li></ul><ul><ul><li>Skype interviews </li></ul></ul><ul><li>Stanford ITunes very successful </li></ul><ul><li>However, Podcasting still fairly new to HE sector </li></ul>
  7. 7. Creating a Podcast <ul><li>Make the recording: </li></ul><ul><ul><li>Eg. Using audio recording software e.g. Audacity </li></ul></ul><ul><ul><li>Best to use good quality microphone and a PC </li></ul></ul><ul><ul><li>Recording usually delivered as mp3 file </li></ul></ul><ul><li>Upload the recording to a web server and create an RSS file for the recording </li></ul><ul><li>Possible problems </li></ul><ul><ul><li>Speaker moves about </li></ul></ul><ul><ul><li>High level of background noise </li></ul></ul><ul><ul><li>Interference </li></ul></ul>
  8. 8. Audio Processing <ul><li>Editing – pauses, coughs </li></ul><ul><li>Equalisation </li></ul><ul><li>Amplification - normalisation </li></ul><ul><li>Pitch change </li></ul><ul><li>Volume Compression </li></ul><ul><li>Filtering </li></ul><ul><ul><li>Noise reduction (Steinberg Cleanup) </li></ul></ul><ul><li>File Compression (typically to mp3) </li></ul>
  9. 9. Creating a Podcast (2) <ul><li>Early adopters approach – copy & edit an existing RSS file </li></ul><item> <title>Podcast 1 For IWMW 2006</title> <link>…podcasts/podcast-iwmw-2006-01.mp3</link> <guid>…/ 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=&quot; …/podcasts/podcast-iwmw-2005-01.mp3&quot; length=&quot;1575770&quot; type=&quot;audio/mpeg&quot;/> <pubDate>Sun, 12 Jun 2006 ...</pubDate> </item> <channel> <title>IWMW 2006 Podcasts</title> <link> </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>
  10. 12. Creating a Podcast (3) <ul><li>Some software now available </li></ul>
  11. 13. Podcasting Usage Scenarios <ul><li>Podcasting is not a replacement for the ‘real thing’ – the live lecture theatre experience </li></ul><ul><li>But it means you can … </li></ul><ul><ul><li>access lectures, conference presentations etc. after the event – Stanford ITunes. Some examples now in the UK. </li></ul></ul><ul><ul><li>Provide some support in case of problems (e.g. couldn't attend talk), conflicts (parallel sessions), … </li></ul></ul><ul><ul><li>Provide a 'taster', helps in marketing, addresses additional areas (e.g. social activities), … </li></ul></ul><ul><ul><li>Keep informed of developments elsewhere </li></ul></ul>
  12. 14. SMIL <ul><li>W3C Specification </li></ul><ul><ul><li>‘ Synchronized Multimedia Integration Language’ </li></ul></ul><ul><li>SMIL presentations can integrate audio and video with images, text or other media type </li></ul><ul><li>Syntax and structure similar to HTML </li></ul><ul><ul><li>SMIL 2.1 released Dec 05 </li></ul></ul><ul><ul><li>SMIL 1.0 released 1998 </li></ul></ul><ul><li>Examples </li></ul><ul><ul><li>Customers, Suppliers and the Need for Partnerships – Stephen Emmott </li></ul></ul><ul><ul><li>State of the Web 2005 – Molly Holzschlag </li></ul></ul>
  13. 15. Creating a SMIL presentation <ul><li>Record and process audio </li></ul><ul><li>Create the image files </li></ul><ul><ul><li>Assuming based on a Powerpoint presentation </li></ul></ul><ul><li>Write SMIL code </li></ul><ul><li>Make SMIL code accessible </li></ul><ul><li>Add other optional features </li></ul>
  14. 16. Process Powerpoint slides <ul><li>Export from Powerpoint </li></ul><ul><ul><li>‘ Save as’ PNG – every slide </li></ul></ul><ul><ul><li>Can look a bit messy: </li></ul></ul><ul><ul><li> </li></ul></ul><ul><li>Process image files in graphics program such as Macromedia Fireworks </li></ul>
  15. 17. SMIL code <ul><li><smil xmlns=&quot;; xml:lang=&quot;en&quot;> </li></ul><ul><li><head> </li></ul><ul><li><layout> </li></ul><ul><li><root-layout height=&quot;450&quot; width=&quot;750&quot; background-color=&quot;white&quot;/> </li></ul><ul><li><region id=&quot;main&quot; title=&quot;Main&quot; width=&quot;600&quot; height=&quot;450&quot; fit=&quot;fill&quot;/> </li></ul><ul><li><region id=&quot;nav&quot; title=&quot;Navigation&quot; width=&quot;150&quot; height=&quot;450&quot; left=&quot;600&quot;/> </li></ul><ul><li></layout> </li></ul><ul><li></head> </li></ul><ul><li><body> </li></ul><ul><li><par> </li></ul><ul><li><audio src=&quot;emmott.mp3&quot; /> </li></ul><ul><li><img id=&quot;image_1&quot; src=&quot;Slide1.jpg&quot; region=&quot;main&quot; begin=&quot;0&quot;/> </li></ul><ul><li><img id=&quot;image_2&quot; src=&quot;Slide2.jpg&quot; region=&quot;main&quot; begin=&quot;1:25&quot; /> </li></ul><ul><li><img id=&quot;image_3&quot; src=&quot;Slide3.jpg&quot; region=&quot;main&quot; begin=&quot;2:06&quot; /> </li></ul><ul><li><textstream src=&quot;nav.rt&quot; region=&quot;nav&quot; begin=&quot;0s&quot; /> </li></ul><ul><li></par> </li></ul><ul><li></body> </li></ul><ul><li></smil> </li></ul>Example Demo
  16. 18. Accessibility <ul><li>‘ alt’ and ‘longdesc’ text attributes </li></ul><ul><li><body> </li></ul><ul><li><par> </li></ul><ul><li><audio src=&quot;emmott/emmott.mp3&quot; alt=“recording of a talk by Stephen Emmott called Customers, Suppliers, and the Need for Partnerships&quot; longdesc=&quot;emmott/emmott.txt&quot;/> </li></ul><ul><li><img id=&quot;image_1&quot; src=&quot;emmott/Slide1.jpg&quot; region=&quot;main&quot; begin=&quot;0&quot; alt=&quot;Customers, Suppliers, and the Need for Partnerships title slide&quot;/> </li></ul><ul><li><img id=&quot;image_2&quot; src=&quot;emmott/Slide2.jpg&quot; region=&quot;main&quot; begin=&quot;1:25&quot; alt=&quot;Copyright and credits slide&quot;/> </li></ul><ul><li>… . </li></ul>
  17. 19. Accessibility <ul><li>Captioning </li></ul><ul><ul><li>Makes SMIL accessible to those with difficulty or who are unable to hear </li></ul></ul><ul><ul><li>SMIL audio track improves accessibility for those with visual impairments </li></ul></ul><ul><ul><li>Requires a transcription of the spoken content (plus any important non-spoken sound), and associated a timestamp </li></ul></ul><ul><li>Add a textstream to the SMIL code: </li></ul><ul><ul><li><textstream src=&quot;emmott/transcript.rt&quot; region=&quot;text&quot; begin=&quot;0s&quot;/> </li></ul></ul><ul><li>Example </li></ul>
  18. 20. Issues <ul><li>Technical Issues </li></ul><ul><ul><li>Not many SMIL editors </li></ul></ul><ul><ul><li>Audio recording quality </li></ul></ul><ul><ul><li>Users have different SMIL players (or no SMIL player) </li></ul></ul><ul><ul><ul><li>Mixed media problem </li></ul></ul></ul><ul><ul><li>Difficult to capture complex elements of a presentation </li></ul></ul><ul><ul><li>No control over a users audio and video settings </li></ul></ul><ul><ul><li>Large files sizes (can be solved by streaming) </li></ul></ul><ul><li>Non-Technical Issues </li></ul><ul><ul><li>Time consuming – Flash and Quicktime easier? </li></ul></ul><ul><ul><li>IPR </li></ul></ul>
  19. 21. SMIL Usage Scenarios <ul><li>A SMIL presentation is not a replacement for the ‘real thing’ – the live lecture theatre experience </li></ul><ul><li>But it means you can … </li></ul><ul><ul><li>access lectures, conference presentations etc. after the event – eg. IWMW and this ALT-C workshop today </li></ul></ul><ul><ul><li>Provide some support in case of problems (e.g. couldn't attend talk), conflicts (parallel sessions), … </li></ul></ul><ul><ul><li>Provide a 'taster', helps in marketing, addresses additional areas (e.g. social activities), … </li></ul></ul>
  20. 22. Some references <ul><li>W3C SMIL Page </li></ul><ul><li>W3C Accessibility Features of SMIL </li></ul><ul><li>Synchronized Multimedia On The Web - Larry Bouthillier </li></ul><ul><li>SMIL Scripting for Quicktime </li></ul><ul><li>SMIL </li></ul>

Editor's Notes