Les techniques de production live donnent une nouvelle dimension aux cours en ligne de l'université technologique de Delft
November 10, 2017 by Ellen Camloh
Delft University of Technology has long enjoyed a reputation in the Netherlands for its high standard of engineering education. Now, thanks to the school’s technical expertise of another kind – online video education – TU Delft’s reputation has grown to a global platform.
Today, it not only shares the stage with leading universities like MIT, Harvard and Berkeley, but also serves as an example that other schools turn to when producing their own online courses.
“Early on, around the year 2000, we saw how the Internet could be used for education, and we began building small sets and mobile studios to create lessons for online delivery,” says Jan Douma, AV Systems Engineer for the university’s NewMedia Centre. It was a visionary move: within years, a new phenomenon called MOOCs gained momentum, and TU Delft was already prepared.
MOOCs, or Massive Open Online Courses, are freely accessible video courses for anyone online. Because of their open nature, popular MOOC platforms offer lessons for hobbyists, skills building, professional development or standalone academic topics.
At TU Delft, however, the MOOCs follow formal curriculums that strongly correlate with the courses offered to students enrolled in a degree program.
“We had to create a system for production that would match the quality of education TU Delft is known for in the classroom,” says Douma. That meant addressing three major factors.
First, how to accelerate the video production process to meet the booming demand for MOOCs.
Second, how to give instructors – people trained in academics, not video – the tools and the confidence to deliver high-quality, effective online instruction.
And finally, how to create engaging content that would keep students watching and learning.
Jan Douma used a mix of technology, in-house development, and media expertise to design and build a production studio from scratch – resulting in innovative video workflows that solved all three issues in a way the other MOOCs had not discovered.
We Don’t Do Post
“What’s interesting about TU Delft is that they have a firm rule about producing online lessons,” says Arnout van der Hoek, workflow consultant with Lines Broadcast BV, NewTek elite reseller in the Netherlands. “It’s a simple rule: ‘We do not do postproduction.’”
But this wasn’t always the case.
“In the beginning, we did all our video production the standard way; recording with a camera, doing multiple takes to get enough coverage, and then taking that footage and doing everything in post-production,” says TU Delft’s Douma. “It was very time consuming.”
With a NewMedia Centre colleague, Ruud van Zijl, Douma devised a workflow that would allow them to produce complete lessons without any postproduction, and built a studio to accommodate it.
The heart of the studio is a NewTek TriCaster® 8000, with three JVC-Gy-850 cameras and other sources connected to it.
“Because our productions are done in real time, we chose the TriCaster because it can simultaneously handle all the video sources we could use,” says Douma. “The advantage is that you get the continuity of lighting, position, and coordination when you switch camera angles live, so the quality is consistently the same” – as opposed to cutting together different takes in postproduction that may not match up.
“That’s the key to how the TriCaster works,” says Lines Broadcast’s van der Hoek. “You don’t need postproduction because you make a polished, finished presentation in real time.”
Streamlining For Productivity
Switching the production model to real-time changed the game for TU Delft’s ability to produce entire courses in less time.
“When we first started, one week’s worth of lessons for a MOOC – seven clips, with a recording session for each lesson, postproduction, formatting, and uploading to YouTube – took us two weeks to complete,” says Douma. “With the TriCaster workflow, we can do the same amount in about two hours.”
The dramatic boost in production was unheard of in educational networks such as edX, the Harvard- and MIT-led platform for university MOOCs (of which Delft was an early member).
“At some universities, producing a single MOOC series can take about 6 months with a large crew,” says Douma. “With our TriCaster workflow, in the last four years, with 4 or 5 persons, we’ve done 60 MOOCs, 45 blended learning projects and 25 professional courses. That’s about 5,400 videos in four years.”
That level of productivity captured the interest of the other edX partner universities during a conference at TU Delft – some of whom have since adopted similar real-time practices after exploring the NewMedia Centre facilities.
Done Your Way
Depending on the instructors’ abilities, the NewMedia Centre has a tiered production model, says van der Hoek. “There are three levels of service – you do it yourself; we do it with you; or we do it for you.”
The more advanced main studio – built around the TriCaster 8000 – caters to the “done with you” and “done for you” models.
For lecturers who opt for the self-service model, Douma and his colleagues designed and built in-house a “do-it-yourself” studio around a simpler TriCaster 410 workflow. The team custom-developed interfaces using TriCaster SDKs and programming to provide automation control options that allow instructors to run their own show in real-time.
“It’s built like a giant green-screen photo booth,” van der Hoek says. Teachers who use this option step into the studio, load their presentation, choose a background, and enter or import teleprompter text.
They then add markers that indicate video switching decisions: when they want the program to display the full-screen PowerPoint; when they want the PowerPoint and the teacher in the same frame; or when only the teacher should appear. Then the studio lights go on automatically.
“When you’re ready, the production starts. You follow the teleprompter script, and the automated system switches according to your markers,” says van der Hoek. “Afterwards, you can review it. If you are satisfied, you can send it to the online server. It can be published right away.”
The whole process may take only an hour, allowing the NewMedia Centre to produce more lessons every day.
It’s appealing for teachers to do lessons with the TriCaster in real time, rather than recording several takes then waiting a few days for the finished product, because they are in control of the presentation.
And more importantly, says Douma, each lesson maintains its authenticity: there’s no polishing or cleaning up after the raw recording. There’s no “fixing it in post.”
Train The Trainer
When instructors come to the NewMedia Centre with the intention of making a MOOC, the staff puts them through an established training program.
First, they introduce them to the visual and technical opportunities. “We ask them to explore: what are the possibilities, which boundaries can you look for, how far can you push it? And then our technical staff can make it happen,” Douma says.
As an example, one teacher had taught an experiment in his classroom by drawing on a clear pane of plate glass hanging in front of him.
The staff thought it made such a great visual, that he should recreate it in the studio for his MOOC students. But logistically, it wasn’t feasible to install plate glass for this one professor’s lessons and remove it for the others’.
Instead, they used NewTek’s NDI® Telestrator, an over-the-network drawing application connected to the TriCaster by IP, to draw formulas and diagrams that would then appear over the camera source. “We can write formulas on the tablet while he’s explaining them, and the writing appears floating in the air in front of him,” says Douma.
“We’re constantly experimenting with all kinds of elements, while avoiding postproduction. All those extra details that multimedia makes possible for learning – that’s what we do here. And the TriCaster helps us bring it to life so it’s more comprehensible for everyone.”
They also train instructors on technical requirements: how to design PowerPoint slides correctly, and how to write their scripts to sound natural (while optimizing them for teleprompter and closed captioning use as well).
And – just as importantly – they cultivate in instructors the on-screen presence to deliver an engaging lesson.
“We give our instructors media training from a producer that works in television,” says Douma. “He helps the lecturers experiment with their own personalities and get more comfortable with video.”
To Jan Douma, it’s not only about getting a good learning object to put online; it’s also a chance to see the instructors flourish and become more at ease in front of the camera. “You can see people grow in such a fast way… it’s beautiful.”
Achieving that comfort level was the key to TU Delft’s purchase of TriCaster systems. “In 2009, we visited the ISE Show and saw a demo at the NewTek booth. This was a live presentation showing how one person could operate a whole studio - audio, video, camera switching, graphics and everything,” says Douma.
“We thought, if we use the TriCaster, it will be less intimidating for the teachers. It will put them at ease, because they won’t be surrounded by equipment. They’ll be more comfortable seeing only one person, and not a large technical crew.”
Douma says the NewMedia Centre is continually experimenting with advanced technologies, so they can stay a step ahead of the instructors.
“We always have the new technology ready, we know how to work with it, and we integrate it with our TriCaster systems – so when the teacher says, ‘I’d like to try this new technique,’ it’s possible. We already have it.”
Jan Douma and his colleagues have integrated automation, virtual reality, augmented reality, and mixed reality into their TriCaster workflows.
“We’re now working on 360 video, and that technology is going to be a huge opportunity to create learning objects. One lesson we’re creating explores a water treatment facility. In-person students have the chance to take a guided tour at the facility, but its capacity is only 20 students per tour. So the question was, can we make a tour in VR that is almost the same experience?”
His team went to the facility, scouted the location, captured some 360-degree video samples, and are now creating that experience.
“You can replicate the guided tour at the site, but also interact with the machines, click on one to open a panel with all its stats and figures, what it’s capable of, and where it fits within the systems of water treatment.”
Of course, there’s always uncertainty when it comes to disrupting traditional learning methods.
For instance, are students using MOOCs as an excuse to avoid attending class in person, and just get the “highlights” online? At TU Delft, their research is showing otherwise.
In fact, they found, students use the MOOCs to supplement and review in-class assignments, especially while they are preparing for their exams.
“The instructors see their outcomes improving, their percentage of successful students are going up,” says Douma.
“They’ve looked at the data,” he says, “and they can see that the lessons they are producing in our facilities are really helping the students get even more engaged in what they’re learning.”
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