Back in October 2012 I figured that at some point, in the then near future, that the Ratanga Junction theme park (located near Cape Town and built using funds from the global financial crisis of 2001) would probably be closed and…
I run a business on the side that does media/film/video productions. This business largely runs itself but in order to keep clients happy and the business current I'm always on the lookout for new ways of doing things. New ways that are better, stronger, faster and more efficient than what we've done in the past. Efficiency ultimately translates into cost savings and cost savings keep clients happy.
Live-streaming video content is an expanding area of business for my little company. Live streaming is fortunately very interesting to me because it poses some curious challenges and marries several fun technologies, like video compression, network routing, transcoding, repeating, routing, proxying, optics, storage, cabling, etc. It's multi-faceted.
We generally achieve live streaming in one of two main ways; but they both start with big heavy cameras, expensive coaxial cables, a big bulky video mixer, some LCD monitors, loads of converters, frame rate and resolution "scalers" and then an output step. The output step involves either a dedicated video streaming device, like the Teradek Vidiu or a laptop running a USB3 capture card and the amazing OBS.
These setups are unfortunately huge and by extension very expensive (as they require a lot of expensive equipment, space, cabling, setup time, crew, etc).
A client recently started asking about ways in which they could do smaller, "lighter-weight" multi-camera streams for the purposes of internal marketing and staff training. One of this client's staff members had found an advert for a system, called the "SlingStudio".
Now, "SlingStudio" is a very poorly thought-out name, because the word "Sling" often means a type of support equipment that may not be "safe for work". My client's staff member mentioned this device, the SlingStudio that is, and asked if it could work for their purposes. I looked into it and I must admit it seemed too good to be true... and it is, sort of. They've taken a leaf out of Blackmagic Design's book, in that it isn't a bug-free product and it certainly isn't plain-sailing to operate.
The SlingStudio is tiny compared to the setup we normally use. The switcher and video encoder/streaming module are contained in one device the size of a fancy wifi router - and ironically the device is also a wifi router, albeit a very limited one. The system has some notable limitations, that mostly extend out of its core design:
In order to use the machine in practice you need the following :
The above makes for a very compact setup compared to traditional configurations. In South Africa, almost all of our "ENG"-style cameras operate on PAL (25p/50i) frame rates, which makes them incompatible with most projectors. This means that you need a frame rate converter to connect a normal mixer and camera setup to a projector system - but the SlingStudio is an American product and it only supports NTSC (specifically 30p, 60p* and 60i). As a result of this frame rate selection all venue projectors are happy to deal with the signal the SlingStudio outputs. The SlingStudio can output video to the internet via RTMP or to Youtube and Facebook directly. It can even create events on those platforms using the iPad console interface. In parallel it can also record your output stream (program), your video sources individually, your line-in audio source and output a limited set of streams via HDMI. Really impressive stuff. All this is at an extremely attractive price point that's a fraction of the cost of a traditional setup. So what's the catch ?
There are several catches, but it is possible to work around them if you understand them in the context of your brief. Here are some limitations, some of them are South Africa-specific :
In practice the system has been pretty amazing so far. I performed extensive testing (in excess of several days of streaming) before actually using the device on a real shoot. In a real-world environment the system unfortunately has failed once so far, but after some investigation I came to the conclusion that the fault was caused by a ground-loop between an HDMI input and the machine's line-in audio input (the ground-loop was created by an audio desk's dodgy power supply). The solution was to put as much of the system on battery as possible and air-gap everything else (we moved the audio onto a wirelessly-connected camera). This resolved further issues. The lesson here is don't "electrically" trust the voltages of third-party equipment.
So, if you find that your SlingStudio's wifi occasionally abruptly disappears but the device continues operating normally otherwise, you're probably experiencing a ground-loop related issue. Galvanically isolate the crap out of everything.
The SlingStudio can send a "quad view" output, program output or HDMI pass-through to the HDMI output. Switching between these modes is seemless, so it's possible to use it as a rudimentary auxiliary output.
For all the SlingStudio's limitations, issues and reliability concerns the feature that really stands out is the edit - it's possible to import SlingStudio recorded projects/footage into Adobe Premiere Pro and Apple Final Cut Pro. The resulting timeline includes all of your cuts and transitions. It's an absolute treat and makes fixing things easy. This is the biggest sell for the SlingStudio for me against other competing solutions.
All-in-all the SlingStudio is an amazing piece of equipment at an almost unbelievable price-point ($1000 without the transmitters and iPad) but it does have very specific limitations and can be finicky. A traditional system is a lot more effort to set up but it is much more reliable and provides lower-latency and better quality feeds.