Howard Roll wrote:So all I need to replace 4 simple coax runs is 2 computers, 2 TB-PCI interfaces, a couple capture cards, and a managed IP network? For this "convenience" I get latency and huge quality hit? My workday just got so much simpler. This technology is interesting for sure but I'm still struggling to find a way that it's interesting to me personally.
Hi Howard !
Clearly IP Video is not something for everyone, but it's becoming more and more important in many sectors.
Its not fundamentally altering *what* we do, but how we do it, and it's the possibilities to expand and enhance workflow which make it important.
For example, in the diagram above, imagine you replace the Single Gigabit connection in the middle with a wide area network connection, via the internet - now you are doing remote production, with the same setup.
Or maybe you want to remotely control PTZ cameras over the same network, or you have other devices in the mix which are creating computer generated graphics to be fed into the mix, or you want on-demand monitoring or display of the sources *anywhere* on the network (for MAGI or other display screens), or you want a low latency monitor on an iPhone to carry around when setting up, or you want to take 'backstage' feeds from iPhone cameras.. the possibilities are endless - and that is the point.
If you are just sticking to hauling 4 cameras feeds back to one location over a fairly short distance, then you are right, maybe IP Video is simply not relevant to your workflow. However, once you try IP Video, your mind will start to revolve and suddenly all bets are off in terms of what is and isn't possible in future workflows.
Several years ago I asked Evertz what was driving their interest in IP Video. I was surprised by the reply:...
'We need to enable a bigger video router' - just that.
Apparently 1024x1024 (which was the biggest video router they made) wasn't big enough for some of their customers. So, in this case the IP video transition was primarily based on scalability. Now they make IP Video systems scaling beyond 2048x2048 if you can believe anyone needs that (they do).
Equally, other vendors and broadcasters have different motivations, but its really all about workflow flexibility, and the ability to break away from existing constraints.
To address the 2 points you made about latency and quality, some IP Video (eg SMPTE 2022-6) protocols are exactly the same as SDI in terms of quality and latency, just more flexible in terms of routing. Other IP Protocols like NDI take a different view, and use gentle compression to allow for simpler and less expensive networking, and more convenient integration with different compute devices. If you looked at the NDI images, you would not see any compression artefacts unless you looked *really* closely - its certainly somewhat better quality than most of the compression systems used in most professional video cameras. In terms of latency, NDI can technically go as low as 8 picture lines of latency, although in practice it's usually a frame or so. This is generally rather less than you are getting on your LCD monitors and projectors, and over the 100m run its many times faster than the audio you are getting back from the speakers on stage through the air.
I like to draw a parallel with MP3. 10 years ago we all had a huge stack of CDs and we had to keep changing the record and could never carry them around with us, or even search !! - now we have all accepted a *tiny* compromise in quality, to reap the huge benefits offered by having a tiny device in our pocket with all our music on it. To be able to buy an album and have it instantly on play, and so on. It will be the same paradigm with IP Video. Maybe some tiny compromises (or priority shifts as I call them), in return for a transformation of the overall experience.
Part of the challenge of IP Video is clarifying what it means to different people and this sort of discussion is really, really important. As you say, it may not be interesting to you personally......yet !
But give it a try and see. There are lots of completely free NDI tools for Windows and Mac for you to experiment with, and maybe you will be surprised....
And to return to the basic topic - clearly ATEM users will not want to be left out of the IP Video revolution, and just because the ATEM switchers don't currently have IP built in, it doesn't mean they can't take advantage of this avalanche of new ideas