Opencast Matterhorn at UCT
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Opencast Matterhorn at UCT

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The implementation of the Opencast Matterhorn lecture capture framework at the University of Cape Town.

The implementation of the Opencast Matterhorn lecture capture framework at the University of Cape Town.

Presented at the Opencast Community Unconference, Harvard, 6 June 2012.

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    Opencast Matterhorn at UCT Opencast Matterhorn at UCT Presentation Transcript

    • OpencastMatterhorn atUCTStephen Marquard, Roger Brown,David Horwitz, Edmore MoyoCentre for Educational TechnologyUniversity of Cape Town6 June 2012
    • Our Matterhorn journey• Identified an emerging need on campus: demand for solutions and proliferation of DIY solutions.• UCT staff survey: 78% of lecturers would make some recorded lectures available to their students, 60% would make some lectures public (Dec 2010, n=176), 9% doing some DIY recording• $50,000 allocated for equipment in 2011 (approx $60K in 2012), as a side-effect of including lecture recording in a larger project• Looked at proprietary solutions but either too costly or not aligned with enterprise architecture• Early proof of concept of Matterhorn from Nov 2010• Week-long on-site training and consultancy with Entwine, Oct 2011• Launched production pilot in Feb 2012 on Matterhorn 1.3• Expecting demand to scale up (possibly to 50 venues)
    • Why consider lecture recording?• Challenges addressed • Better student support within courses 1) Students whose first language is not English often • Value to students and staff not struggle to understand the in the course content of face-to-face lectures – Across courses 2) Lectures are content-packed (same year) with limited time for discussion – Same course, 3) Students are sometimes previous years absent for reasons beyond • Potential for wider their control dissemination of UCT’s 4) Student attention and expertise (Afropolitan focus, engagement within a lecture OpenContent, OpenUCT) can vary a lot
    • UCT survey CET 2010 EducationalWhat proportion of your lectures Technology Staff Surveydo you record yourself? 1 to 15 Dec 2010, 176 respondentsIf your lectures could beautomatically recorded, what your students the publicproportion of your lectures wouldyou like to be available to …
    • What it means for lecturers• If you teach in an equipped venue, you may choose to have your lecture(s) recorded• You may need to clip on a lapel mic, but do not need to do anything technical before, during or after.• You may choose how to share the recording: a. Course cohort only (your students) b. University-wide (any UCT students or staff) c. Public (anyone)
    • lecture recording in action Three channels: •Audio •Camera •Screen (VGA output) Allows navigation by slides or timeline Shows viewing statistics (hotspots) Online playback, or download
    • Matterhorn in Sakai CLE with LTI A Matterhorn tool is placed in the Sakai site using the Learning Tools Interoperability (LTI) standard. The LTI tool is preconfigured with the Series ID.
    • Self-service scheduling in the LTI toolhttp://opencast.jira.com/browse/MH-8315 Allow instructors to schedule their own recordings and update recording metadata (title, description)
    • Matterhorn Dashboard We graph a set of metrics (activity, throughput, response time) with mrtg using REST queries and a few direct database queries. View it live at http://media.uct.ac.za/ mrtg/dashboard/ We also have Sintrex monitoring of servers and agents.
    • JIRA integration We manage recording requests and related tasks in JIRA. A custom script will place the LTI tool in the right Sakai site and also create JIRA issues for any workflow failures in the series.
    • Matterhorn Deployment• 4 SLES VM instances (1 x admin node, 1 x Red5 streaming server, 2 x worker nodes)• mysql 5.1 database• Storage on SAN, shared by nfs• 15 Ubuntu capture agents in venues (small Dells)• Workflow for handling recording requests uses JIRA integrated with Matterhorn (though still too manual)
    • Venue equipment• Custom-built Capture Agents (Dell Optiplex 780 USFF)• Epiphan USB2VGA• Logitech C910 webcam• MXL AC404 USB Conference Mics• Integration with venue audio systems• IP Cameras
    • Scale• 15 equipped venues• 8 active venues Feb-May 2012• 1605 distinct users to date• Peak activity: – 28 recordings / week – 25 concurrent streaming users – 148 distinct users in 24 hrs – 75 distinct recordings viewed in 24 hrs
    • Audio• High reliability in simple venues (USB conference mic)• 50% reliability in some venues with lapel mics: – Flat batteries – User behaviour – Missing microphones – Inadequate in-venue support• New audio strategy: combination of mics for amplification and recording-only mics (e.g. boundary mics), auto- selected / mixed with Digital Signal Processor• Involved in a project to redesign the A/V support services on campus (design, installation, support)
    • R&DSpeech recognition (Sphinx4)http://www.slideshare.net/smarquard/open-textspeech-recognition-in-opencast-matterhornIntend to start a broader applied research andevaluation projectInterested in Arduino- or Raspberry-Pi basedvenue displays and controls
    • Talk to us!Roundtable / BOF session on Audiohttp://opencast.jira.com/browse/MH-8311http://source.cet.uct.ac.za/svn/matterhorn/http://media.uct.ac.za/mrtg/dashboard/http://media.uct.ac.za/engage/UI/stephen.marquard@uct.ac.zahttp://twitter.com/stephenmarquard