Limelight Networks Interview: Streaming the Olympics

The Olympics aren’t supposed to start until tomorrow, but they officially began online last Tuesday night. Take a trip over to the NBC Olympics site and you’ll see video of early soccer matches, including a full replay of the US women’s defeat at the hands of Norway. Except for the defeat itself, it’s a beautiful thing. Thanks in no small part to Limelight Networks.

In the interest of full disclosure, I should note that I’ve recently started doing contract work for Limelight, a content delivery network (CDN) service provider. So take these thoughts with a few grains of salt. However, when I sat down to interview Limelight SVP Dave Hatfield, I wasn’t interested in Limelight, per se, but the bigger story around the Olympics. Limelight Networks is delivering all of the NBC Olympics video streams (Akamai is supporting delivery of static objects), and I figured the folks there would have some interesting insights into how NBC is going to pull off this monumental task: NBC intends to deliver 3,500 hours of coverage online including 2,200 hours of live streaming video. It’s literally mind-blowing, and certainly unprecedented. Here’s what I learned about how they plan to do it.

The Player

Before getting on the phone with Hatfield I checked out the early videos on the NBC Olympics site. The Microsoft Silverlight player is sweet. You can watch four video streams at once and turn on features like live text commentary. There is also no latency. Zero. Click to any point within a stream and the video instantly switches to that frame. I asked Hatfield about that lack of buffering and about the bandwidth demand created by allowing a single computer to access four streams at once. Regarding the latency, he talked about how the Limelight CDN is structured. The CDN plugs directly into the access networks of ISPs all over the globe, and Limelight’s private fiber network is used to transfer content at the speed of light between massive server hubs whenever necessary. It’s a great story, but the proof is in the application itself. Did I mention the zero latency? I’ll be curious to see how that holds up once the actual Games start.

Regarding the bandwidth, Hatfield didn’t seem to be the least bit concerned. The scale of the Olympics is new, but streamed events are becoming more common, each Web event tending to break the record set by the one before it. Unfortunately, we can’t predict how much bandwidth the four-window application will actually use because we don’t know what bit rate NBC is using on its videos. By using an adaptive bit rate, NBC can transfer video at whatever rate a viewer’s ISP can handle. But as far as I can tell NBC hasn’t disclosed the highest bit rate it’s using for the fastest connections.


Everyone is wary of making predictions about the number of viewers the Olympics will get online. Hatfield referenced previous streaming events, which have hit records in the hundreds of thousands of viewers, then said (as Limelight has said elsewhere) that he wouldn’t be surprised to get a million simultaneous viewers on the NBC Olympics site. I think he was underselling that prediction. If I read the tone right, Limelight expects the number to be higher, but wants to keep expectations in check. As the numbers come in from NBC after the Games are underway, Hatfield says he is hoping to learn not just how many users the site gets, but how long viewers stay engaged. Will consumers watch two hours of Olympics coverage online at once, or are attention spans just not ever going to be that long on the Web?

Streaming Live Events

I asked Hatfield about the growth Limelight has seen in streaming live events online. By my own recollection, there’s been a significant uptick in the last six months alone. Plus, the NFL recently announced it will be streaming games online this fall. (Akamai and Limelight Networks have been tapped for delivery.) Hatfield believes we’ve hit an inflection point. The combination of an improved user video experience online, significantly more video content available on the Web in general, and some successful attempts at monetizing online video are all converging now, according to Hatfield. This means the Olympic Games are probably only at the beginning of a wave of live online video events. An excellent early case study.

4 thoughts on “Limelight Networks Interview: Streaming the Olympics”

  1. Limelight has done a tremendous work at getting its network ready for potentially largest event in the history of streaming media. It’s great to see that streaming media technologies have matured and now capable of supporting the event of this magnitude. This is a good indication that many more events of this or similar scale could end up been streamed live and on-demand on the Web. The workflow put together to support this event is quite amazing. From content acquisition in Beijing to transport of multiple video encoded feeds to the US, to ingress into CDN(s) Limelight Networks being the primary one, and ultimately delivery to the end-users via new rich internet application (RIA), powered by Microsoft Silverlight.

  2. I’ve been trying to watch the Olympics in various environment online. Not great results. I’ve used IE & Firefox, all with fresh Silverlight installs. I’ve tried on two desktop computers and one laptop.

    Whether at home with DSL, or other broadband points like Starbucks and McDonalds, I get substantial buffering issues and live streaming macroblocking.

    Maybe my experience is unique, but overall the online viewing experience has been sub-par.

  3. Silverlight for Olympics sucks. No full screen and no playback for PPC Mac users. Just another useless plugin to have to load. Microsoft is forcing this garbage on everyone it can by using its wallet. No better than Flash!

    I ran this over a big pipe on an Intel Mac and it was blocking and even stuttered at times. No full screen.

    Who cares about Silverlight, it is just Microsoft with a solution to a non problem. Ever heard of Flash? Why do we need yet another proprietary video format controlled by ONE company when there were already better solutions?

  4. Even my t-1 connection at the office doesn’t pull up the video that quickly. Not only that when the video is enlarged the quality is blurry and the video skips. don’t remember those issues with Akamai. The quality of the video is infininently better while watching it on HD cable TV. At a minimum we should see video on a non HD level, but blurred and skipping video doesn’t cut it.

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