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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Pro AV Forum => Topic started by: Mark Olsen on November 27, 2019, 03:03:49 am

Title: Video over IP balun (?)
Post by: Mark Olsen on November 27, 2019, 03:03:49 am
Has anyone ever actually used one of these?

https://www.lenkeng.net/Index/detail/id/147

In theory it looks pretty sweet, a video balun that can actually coexist on a network and be transported and powered via POE switches.
Iíd love to get some for our church to upgrade from the random mismatch of video baluns and splitters and adaptors, etc.

Anyone got any first hand experience?
What is the latency like?

Iíve heard of the just add power models, but I donít have that kind of coin!

Mark

Title: Re: Video over IP balun (?)
Post by: Valentin Filitov on November 27, 2019, 09:07:40 am
IMHO I think you shouldn't expect for good video quality. I used almost the same chinese hardware and I can say that it worth their cost. But there were some troubles:
1) Artefacts and noise can appear (due to comression quality)
2) Maybe video-audio desync can appear
Except this things it is good reliable hardware
Title: Posting Rules
Post by: Mac Kerr on November 27, 2019, 10:39:57 am
IMHO I think you shouldn't expect for good video quality.

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Title: Re: Video over IP balun (?)
Post by: Caleb Dueck on November 28, 2019, 09:08:19 pm
Has anyone ever actually used one of these?

https://www.lenkeng.net/Index/detail/id/147

In theory it looks pretty sweet, a video balun that can actually coexist on a network and be transported and powered via POE switches.
Iíd love to get some for our church to upgrade from the random mismatch of video baluns and splitters and adaptors, etc.

Anyone got any first hand experience?
What is the latency like?

Iíve heard of the just add power models, but I donít have that kind of coin!

Mark

You need to get a good integration company involved.  Video distribution, especially if over IP, is not a simple matter of "Brand X is OK". 

Who determined that IP distribution will serve you better than 3G-SDI or HDbaseT?  What about switching and control?  Do you have an experienced IT person to manage the network?  Do you have bandwidth mapped out? 
Title: Re: Video over IP balun (?)
Post by: Brian Jojade on November 29, 2019, 01:01:48 pm
I tried a few of those types of kits. Not that brand in particular, but others.

There are generally 2 types of devices out there. First is the type that converts HDMI signals using a direct cat 5 wire.  These are not IP devices.  General experience with these is that it's VERY picky about cable length, type of cable, external interference, etc.  Once you get it working, they seem to work fairly well, but getting to that point can result in a lot of hair pulling to say the least.  It's not uncommon to get a video signal that has weird looking artifacts pop up on the screen.

The IP version of the devices that I've used seem to be much easier to deploy.  Of course, this will all depend on the actual quality of the hardware and its ability to convert the signal properly.  Note that every one I've used has created noticeable latency in the signal.  Your usage will determine if that matters or not.

The other thing to make sure of is that you have the devices on their OWN network, or at the very least, on their own VLAN.  The network broadcast traffic is tremendous and will cause issues with other devices.  Other devices trying to broadcast can interrupt the signal as well, which is also obviously undesirable.
Title: Re: Video over IP balun (?)
Post by: Scott Holtzman on November 29, 2019, 03:36:22 pm
Has anyone ever actually used one of these?

https://www.lenkeng.net/Index/detail/id/147

In theory it looks pretty sweet, a video balun that can actually coexist on a network and be transported and powered via POE switches.
Iíd love to get some for our church to upgrade from the random mismatch of video baluns and splitters and adaptors, etc.

Anyone got any first hand experience?
What is the latency like?

Iíve heard of the just add power models, but I donít have that kind of coin!

Mark

It's not a balun, a balun is a passive device that matches impedance.