From Streaming on a Boat, to a Live ESPN3 Broadcast – The Flexibility of Wirecast


Editor’s note: We are giddy to present another guest blog from Imry Halevi, who currently serves as the Director of Multimedia & Production at Harvard University. Imry has worked directly with Stretch in the past when he served in a similar capacity at Northeastern University, and he is truly one of the best in the business. Though Harvard is not currently an active Stretch Internet client, Imry has continued to be a tremendous resource and has stayed active with the Stretch community. If you haven’t read his previous guest posts, do yourself a favor and check them out here

In his post below, Imry walks us through the variety of ways they utilize Wirecast as part of their current broadcasting workflow. Wirecast is a powerful encoding software that many current Stretch clients utilize and there’s some great stuff here. Please keep in mind that while the equipment outlined below may work for your environment, we always want to chat with clients before they make any purchases. That is to say, nothing below should be considered an official recommendation. There are a variety of factors that our Operations Department will take into consideration when helping clients choose the equipment that is appropriate for their environment, so please contact us anytime with questions.

With that caveat, take it away, Imry…

It was not too long ago that planning for different sizes and scopes of video productions meant planning to use different gear and different software. Small productions could be supported by a software-only solution (such as Telestream’s Wirecast or Adobe’s Flash Media Encoder), while large productions called for physical switchers and lots of conversion gear.

Well, with new advances in technology, and on-going trends of lower equipment costs, those planning sessions have become much simpler. This past year at Harvard, we had the opportunity to plan and execute three completely different productions, and we did them all using the same core equipment and setup. All of this was possible due to our use of Telestream’s online streaming software – Wirecast – and its recently released 64 bit version. This software has become so powerful and diverse that we now use it for all but our largest of productions.

1. Powerless, wifi-less and on a boat

A JVC GY-HM600 streaming from the bow of a launch

A JVC GY-HM600 streaming from the bow of a launch


One of our simplest, and yet most challenging production setups, are online streams for rowing races. Harvard has four rowing teams, and since long races on a river are not the best spectator sports, we have started streaming those races online.

There are obvious limitations and difficulties for streaming live video and audio from the middle of a river. However, we have come up with a compact and easy to deploy solution, which provides us with the flexibility to put together HD quality productions with no connection to land-based infrastructure. To start us off, here is a list of ALL the equipment we bring with us on a boat:

1. Apple Macbook Pro with Retina Display (15″, 2.2GHz, Core i7, 16GB Memory) + power cable
2. Blackmagic Design Ultra Studio Mini Recorder + Thunderbolt cable
3. JVC GY-HM600 Camera (with batteries)
4. JVC Tripod Zoom and Focus Controller
5. Portabrace Rain Slick for JVC camera
6. Manfrotto 502 HD Tripod
7. Sennheiser HMD280-XQ Headset
8. Sennheiser HD280 Headphones
9. BNC Cable
10. Verizon 4G Jetpack
11. Black & Decker Portable Power Station

We take all our gear on a launch (a motor boat that follows the crews along the race course) and set up. The general setup revolves around the Macbook Pro with Wirecast on it. We set up a camera on a tripod at the bow of the launch, and cover it with a rain slick (since we do encounter a lot of splashing when going at high speeds). We then use a short BNC cable to get a HD-SDI output from the camera into a Blackmagic Design Mini Recorder. The Mini Recorder is connected to our Macbook Pro using a Thunderbolt cable. The laptop and all the gear are at the bow as well, just behind the camera. We have one commentator join us for the broadcast. They usually sit by the driver, and have a HDM280 headset. The headset connects directly into the camera (both input and output).

So far, a pretty typical setup for many colleges and universities.

Wirecast Rowing Setup (actually showing Wirecast 5.0 from last year)

Wirecast Rowing Setup (actually showing Wirecast 5.0 from last year)


With Wirecast at the heart of the production, we’re able to stream, record, add graphics, add a race clock (more on that later), control audio and add pre-recorded videos, all without the need for any other gear. Since Wirecast is such a powerful program, we used to have to carefully monitor the computer’s CPU usage, as that was the only limiting factor. However, with Wirecast 6.0’s new 64 bit infrastructure, CPU usage has gone down across the board, and so have our worries (Editor’s note: we have found Wirecast 6 may reduce overall CPU usage in quad core environments, but might cause more strain on dual core processors because of the additional feature set).

Our troubles begin (and end) with connectivity. Since we’re on a moving boat in the middle of a river, neither wired internet nor wifi are viable options for us. Therefore, we use a 4G hotspot (in our case, a Verizon 4G Jetpack) to generate a Wifi signal for the broadcast. We’ve done multiple tests and have gotten upload speeds of about 2-2.5Mbps. Not the best when trying to stream a 720p 2Mbps production, but manageable. If we get too much buffering, we lower our data rate to 1.5Mbps, which usually helps. In case the hotspot doesn’t work, we always have an iPhone standing by, which can provide 4G tethering wifi if needed.

Black & Decker Portable Power Station

Black & Decker Portable Power Station


Another aspect of connectivity relates to power. A typical day on the river begins at 6:00am, and often ends around 10:00am. Our camera can easily last that long on its batteries. However, even with the best batteries available, our Macbook Pro and 4G Jetpack usually lose their power around the 2-hour mark. We’ve tried reducing the Macbook’s CPU usage or lowering the screen brightness to reduce its power needs. We even tried to stop streaming and recording between races. However, we’ve always run out of power before the end of the day.

Therefore, this past year, we’ve started experimenting with a Black & Decker Portable Power Station. I think it’s actually meant for jump-starting your car, but it works! When we plug in our laptop and hotspot to the power station, we get about 2-3 hours of uninterrupted 120V AC power. After that runs out, we rely on the batteries for the remainder of the time, which isn’t a problem since they’re all still fully charged.

Even though the production itself is small in scope (though we’ve definitely thought of adding more cameras, a live drone or other aspects to the broadcast), we usually get very positive feedback from fans who enjoy watching these races live. Even though we just use this setup for rowing, I think that this kind of mobile and untethered production could work for many colleges and universities in venues where little to no infrastructure exists. From streaming baseball to rugby to soccer, a 2-hour game is easily doable with just a handfull of gear.

2. A standard broadcast, with many score bug options 

Our simple setup for streaming women's rugby

Our simple setup for streaming women’s rugby


Streaming from a boat is fun, but our typical production is not nearly as untethered. For all Harvard productions of soccer, swimming & diving, volleyball, water polo, wrestling, field hockey, rugby and softball we use a much more grounded version of the setup above. We connect one or two cameras to a  laptop (with one or two Blackmagic Mini Recorders), we have commentator headsets and an ambient microphone connected to a mixer, and we put it all together in Wirecast (while adding some graphics and videos).

The flexibility of Wirecast is really evident when we add score bugs to our productions. Besides video quality and tripod smoothness, I think that a professional, clean and branded score bug is one of the most important aspects of any production. With just a little pre-production work, Wirecast really makes it easy to make your own graphics and score bug. One of the most important aspects of a good score bug (for most sports) is a running clock. Depending on our setup, we use one of three methods to get a clock into our production (Editor’s note: Stretch Internet can offer suggestions for integrating score bugs into your broadcast as well. Contact us for assistance with your specific setup):

1. Clock Cam – The easiest and most common way to get a clock into your Wirecast production is to point a camera at a clock, and then crop and clean the feed in the software. While this solution is quite easy, it does take some work to make it look good. Most times, if the clock cam moves or if the cropping wasn’t done right, the clock on the score bug serves as a distraction, rather than a convenient feature. We use a clock cam for our Field Hockey productions, when no other option really works.

Diamond Capture Device

Diamond Capture Device


2. All-Sport CG – For our large-scale non-Wirecast productions, we use a Daktronics All-Sport CG device to get scoreboard data from the All-Sport 5000 score keeper box, and then bring it in to our LiveText computers for insertion into score bugs. The All-Sport CG also has the capability to take in a video feed, insert a score bug, and then output the combined feed. The problem is that this process only works with analog composite video. Since all our productions are done in digital HD, we really want to avoid downgrading everything just for a score bug.

Therefore, we’ve come up with a solution that allows us to use the All-Sport CG score bug, but maintain our HD video. For any venues where we can conveniently get Daktronics scoreboard data (either wired or wireless), we use an All-Sport CG. We then take an output from the device, and bring it into Wirecast (without anything going into the input port on the CG). We then have a new shot in Wirecast that’s just a black screen with a live score bug. We crop and scale the clock from the bug, and overlay it on top of our branded graphics. Even though the clock shot is in SD, it’s so small and with little motion that it doesn’t really change the overall quality of the production. We use a Diamond Multimedia USB 2.0 Video Capture device to bring in the composite video feed.

A swimming & diving streaming setup, with the green window in the corner

A swimming & diving streaming setup, with the green window in the corner


3. Online Clock – This past season, we started incorporating one new option for score bug clock – an online timer/stopwatch. We use a website called to generate a count-down or count-up timer. The website allows you to change the font name, size and look of the clock, to make sure it fits your overall production graphics. We open up the website in a Mozilla Firefox window, and then use Firefox’s default settings to change the background color of the site to green. Using Wirecast’s Local Desktop Presenter feature, we bring in the Firefox window, then crop it and key out the green background. It’s actually quite easy to do, and provides a clock that is cleaner and better looking than either of the previous two options. The only two limitations with this option is that the Firefox window needs to remain visible on the screen at all times, and that the clock must be controlled manually (stop, start, reset, etc.). Despite the added effort, we’ve used this clock for many of our productions this year, including as a timer for our rowing race productions. It’s also good to always have on-hand as a backup, in case your first choice for score bug clock doesn’t work.

3. Using every input and output possible – and off to ESPN3


Soccer ESPN3 Streaming Setup

The previous two production setups are what we’re used to. Small productions, 1-2 cameras, limited staff, and Wirecast at the helm. It’s what Wirecast is built for, and what we’ve always expected it to do. However, this past November we had to use Wirecast in an unexpected way. Our women’s soccer team won the Ivy League conference title, and was selected to host a first round game in the NCAA tournament. We received a phone call from ESPN, asking that we produce a broadcast of the game for ESPN3, as we do for some football, hockey and basketball productions. Unfortunately, our control room was already busy that day for a scheduled hockey game, so we were stuck. Instead of getting back to ESPN3 with an unfortunate rejection, we decided to pull off the largest and best-produced broadcast we could…all using Wirecast on a laptop. The basic setup included three cameras connected to the laptop (as described here). In addition, we added three major things to make our production more professional, and better suited to ESPN standards:

Intro graphic for soccer on ESPN3


1. Graphics – We created custom graphics in Wirecast specific to this NCAA game. From score bug, to intro graphic, to side panels, to lower thirds – having branded graphics made a big difference, and differentiated our broadcast from any “typical” web stream out there.

2. Program Open – As typical, we had two commentators call the game. However, in our effort to “look more professional,” we decided to pre-tape a complex open, as we do with our larger shows. We started with exterior establishing shots we recorded ahead of time (with an underscore of intro music), then we put the commentators on camera with lighting and stand-up stick mics. Finally, we alternated between our other cameras, each with a game-relevant graphic (such as head-to-head stats, players to watch, bracket, etc.). As expected, the first couple of tries didn’t go so well, so we practiced the open over and over again. Eventually we got it right, and were able to use that recording to start our Wirecast show, and then transition to live cameras once the game began. This professional opening to the broadcast made a big difference, and set the tone for the overall show.

Wirecast and ESPN3 HD-over-IP encoder

Wirecast and ESPN3 HD-over-IP encoder


3. Output – When we typically use Wirecast, we output our production in two different ways – a MP4 recording to an external hard drive for archive purposes, and a RTMP stream to the Ivy League Digital Network. However, neither of those was relevant to ESPN. They wanted us to transmit the production to Bristol, CT using a special HD-over-IP encoder they provided (which takes the place of a standard satellite uplink truck, or dedicated Vyvx fiber). We had never done anything like that before using Wirecast. The encoder had many different inputs options, and we spent a considerable amount of time with ESPN Transmission trying to figure out what we could do. We really wanted to use a Blackmagic Mini Monitor to get a HD-SDI output from Wirecast into the encoder. However, all our Thunderbolt ports were already in use. Our next choice was the built-in HDMI out of the laptop. That worked well, but for some reason the encoder did not receive embedded audio within the HDMI feed. Therefore, we also had to take analog audio from the laptop (using a 3.5mm TRS to DB9 cable) and bring that into the encoder. All-in-all, not the simplest of solutions, but it did provide crystal clear video and clean audio, without taxing the laptop too much.

Wirecast on ESPN3

Wirecast on ESPN3


We were very excited to see that Telestream had released Wirecast 6.0 shortly before this production. The upgraded 64 bit version allowed us to use all inputs and outputs on the laptop with low to moderate CPU usage. We were also able to try out (with low to moderate success) Wirecast’s new replay feature, which we plan on incorporating into more of our productions in the future.

As described in this post, Wirecast provides incredible flexibility in usage – from a one camera stream on a boat, to a multi-camera ESPN3-level telecast. With new features coming out with every software update, and with technology improving and becoming cheaper by the day, these productions are really within reach for almost anyone. All you need to is plan ahead, watch the details, and test…test…test.

I hope you have found this post helpful. Please feel free to reach out to me with any questions you may have.

  • Student

    Thank you for sharing! Amazing post.

  • Scott Vacek

    Thanks so much Imry for taking the time to write this. Your posts have been extremely helpful, and, speaking as someone who came from network broadcasting, it is really exciting to see what I had only dreamed about even ten years ago– the technology evolving so nicely now so that we can accomplish with $10k or $20k of equipment what used to take a million or two. Wirecast does seem like a bit of a revolution to me, and we are using it fairly extensively now in our private and corporate productions. We are working on a new facility in Arizona and all indications are that the core production rig will be a loaded Mac Pro and Wirecast.

    Please keep posting Imry and thank you Telestream!


  • jen

    What did you output to? Another BM device? Which one?

  • Imry

    For our ESPN3 broadcast, we output from the Macbook Pro’s HDMI port to a Fujitsu HD-over-IP encoder.
    For another ESPN3 broadcast that we have coming up in the next few weeks, we’ll actually use a Blackmagic Design Mini Monitor, to get a HD-SDI output feed (with embedded audio) out of Wirecast and into the Fujitsu unit.

  • Kim

    Great post again Imry. I really like to see how solve things, since we have somewhat similar gear, problems and solutions to things. Thanks

  • Chris

    Great article Imry. Question for you – I’m running on Wirecast 6, I upgraded recently after noticing that after upgrading my Macbook Pro Retina 13″ to Yosemite that the Wirecast 4 version I had was getting bogged down (i.e., needing to double click everything on the interface in order to use the software). Love Wirecast 6, but I’ve learned that it doesn’t support/isn’t detecting the Diamond USB capture device for our composite cam. Have you run into this issue at all and, if so, have you found a solution?

    • Imry

      Hi Chris.

      Thanks for the feedback.
      I’ve noticed the same thing as you. Even though Yosemite does support the Diamond USB capture device, Wirecast 6 does not. I’m not quite sure what the problem is, but am hoping it gets fixed eventually.
      Instead, we’ve been using more and more Blackmagic Design Intensity Shuttle USB 3.0 devices. With Blackmagic’s newest Desktop Video driver, these capture devices now work flawlessly with Yosemite and Wirecast 6.0 We use those devices to capture HDMI signals and composite video signals (one device per signal).

      I hope this helps.


      • Chris

        That’s what I was hoping would work (the Blackmagic Design Intensity Shuttle) so it’s great to hear you say it works with Yosemite/Wirecast 6.0. Thanks, Imry!