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Live stream

Discuss graphics hardware, computer hardware, and input/output devices to use with TouchDesigner

Live stream

Postby goloembers » Tue Feb 12, 2019 9:50 am

Hello,

I need to make a set-up with a live stream through Touchdesigner into a projector. I researched a lot in the rtsp streaming and all of that but it seems that streaming on ip/rtsp is really laggy.

So I am trying to figure our a way in which I could transmit 1080 30 fps with as minimum lag as possible but still stay in a budget.
Did anyone experiment with this kind of set-up.

Is there any chance that windows/touchdesigner will recognize the stream with a thunderbolt to usb type c adapter?

Down is a flowchart i made really quick for visualisation.
The laptop that is going to be used is this
rog strix gl553vd
Intel® Core™ i7-7700HQ 2.80GHz
gtx 1050

I would appreciate your help about this. Thanks

Cheers
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Re: Live stream

Postby goloembers » Tue Feb 12, 2019 9:53 am

Or do you have another recommendation for capturing the stream?
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Re: Live stream

Postby nettoyeur » Tue Feb 12, 2019 2:22 pm

It's is a bit confusing to me as you're using the term 'stream' for multiple different things in your question., so maybe I understand wrong.
But it looks like it boils down to two issues:

1) is the live video feed which you want captured in TD.
I don't recommend any usb capture solution from Blackmagic. You can find many bad experiences on this forum as well. And combined with an additional usb to thunderbolt converter, this sounds to me like trouble until you have it seen working on your own hardware - so make sure to test this way before your deadline, while still having the optjon to buy something else!

If it must be USB capture I would try to get a Magewell HDMI-to-USB3 capture device, which is pkug&play as it doesn't need drivers.

2) issue 2 is how to get video over longer distance?
I usually use SDI cables or fiber extenders, or what works really well these days is NDI over ethernet (which needs an addional computer or NDI device on the other end. TD has an NDI In/Out TOP.
There are also cameras now with NDI output, so maybe worth looking into.
Idzard Kwadijk | freelance TouchDesigner consultant | IdzArd.com
Checkout ChopChopChop.org - the TouchDesigner marketplace!
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Re: Live stream

Postby goloembers » Wed Feb 13, 2019 7:20 am

Sorry for the misunderstandings.

I am trying to capture from a camera over a long distance into TD and the project it back on a screen.
I know the about the fiber solution but is to expensive for me right now. So I will use powered utp extenders.

My maine concern is in the part that I have to plug it in the laptop and see that it doesn't work.
I checked the capture card sounds good but unfortunately I have like aprox. 500 $ for extender/utp/capture card. Maybe the Elgato Cam-link would be a cheaper option?

Thanks!
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Re: Live stream

Postby pixelux » Thu Feb 14, 2019 4:13 am

Hello,

As Idzard said, NDI is nowadays one of the best option.
If you search the web you may find a few converter HDMI >> NDI.
for example : http://www.bird-dog.tv/

than just plug Ethernet to your computer and you are set .
Xavier G.
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