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Send SRT video to many
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Zetor1980  
#1 Posted : Wednesday, October 14, 2020 5:23:51 PM(UTC)
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I would like to send video signal from vMix to FB, but also by SRT to 25 receivers (VLC) in classrooms in our school. Is this possible? , any ideas ? Will my computer manage it? I will send one SRT signal or 25 ?
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elgarf  
#2 Posted : Wednesday, October 14, 2020 6:47:01 PM(UTC)
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Hi,

Try to configure your SRT output with "Listener" type.
Then use OBS/VLC to receive SRT stream in "Caller" mode.

Tried on two PC's, looks like it work. I think, main restriction will be your LAN speed.
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thanks 1 user thanked elgarf for this useful post.
Zetor1980 on 10/15/2020(UTC)
PeterH  
#3 Posted : Monday, November 16, 2020 3:34:18 AM(UTC)
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Try srt-live-server

https://github.com/Edward-Wu/srt-live-server

you can run it in a docker container. It works as a srt listener for incoming streams and a listener for outgoing streams. Your client should support the streamid parameter in srt protocol. I think for vlc clients there is a patch.
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DWAM  
#4 Posted : Monday, November 16, 2020 4:09:50 AM(UTC)
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Check srt-live-transmit which will get your srt feed from vMix at the school and transmux it to UDP (either unicast or multicast)
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elvis55  
#5 Posted : Monday, November 16, 2020 7:29:54 AM(UTC)
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For example: srt://192.168.1.100:12345

PC vMix, Network Adress z.b.(192.168.1.100)

In vMix PC: Settings - Outputs / NDI / SRT - SRT Type: Listener-Port: Number - OK
For example port: 12345
Quality: For example = 4mbps + Audio = ca. 5mbps
SRT to 25 receivers: 25 x 5mbps = ca. 125mbps
But you can also choose a lower quality.
Send one SRT signal!

In VLC - Media - Open Network Stream - Network - network URL:
For example:srt://192.168.1.100:12345
Klick Play

For Android SRT Player
https://forums.vmix.com/...r-fur-Android-und-iPhone
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lestra  
#6 Posted : Monday, November 23, 2020 12:24:10 AM(UTC)
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Elvis55, I don't understand, please explain. Is it possible to send just one signal to multiple receivers?
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DWAM  
#7 Posted : Monday, November 23, 2020 1:35:37 AM(UTC)
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Quote:
Is it possible to send just one signal to multiple receivers?

Yes but it's not recommended, especially for 25 clients

As said before, the SRT Alliance recommends to use SRT-live-transmit for such scenarios because it allows to transmux a single SRT feed on the receiving side into UDP which is the best protocol for point to multipoint or multicast.

If you think the workflow :

Elvis suggestion is :
- have 25 clients (from the same network) request SRT pull from a single encoder which has a major impact bandwidth on both sides (where 24 streams copies are basically useless)

My suggestion is :
- have 1 single remote client (srt-live-transmit) request pull from the encoder (a single feed gets transported over the internet). Then this incoming feed is transmuxed in real time to a more appropriate protocol for distribution to 25 clients on the remote network. This saves up a lot of bandwidth and encoding power on both sides and if you go for multicast you can serve up to 250 clients for the cost of 1.
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lestra  
#8 Posted : Monday, November 23, 2020 3:12:42 AM(UTC)
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Thanks. Do you talking about Wowza, Nimble Streamer...?
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DWAM  
#9 Posted : Monday, November 23, 2020 6:58:40 PM(UTC)
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Quote:
Do you talking about Wowza, Nimble Streamer...?


Nope, I'm talking about srt-live-transmit which can be used with any SRT encoder, including vMix

More info:
https://github.com/Haivision/srt

If you don't know how to build your own Windows excutable, let me know
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Maximus  
#10 Posted : Tuesday, November 24, 2020 7:21:15 AM(UTC)
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Hi, I use Haivision SRT Gateway on AWS for single input SRT and Multiple output SRT. I haven't done 25 connections, but I have done 7 without any challenge. I believe they can do a max of 20 outputs, but that may increase if you use a larger instance.

I am not sure if this is what you are looking for, but it works for me. Of course it is at a cost, but I consider the cost reasonable. I start the instance for the event and shut it down after. Let me know if you have any questions.

Maxi
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elvis55  
#11 Posted : Tuesday, November 24, 2020 7:52:38 AM(UTC)
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I tested it with 4 Windows 8 inch tablets, version VLC and 1 Android 8 inch tablet, version Larix Player. Total of 5 recipients.
In vMix Listener setting - Resolution HD720, Quality H264 2.5mbps.
Display in Task Manager - Ethernet sent, between 13 and 16mbps.
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sam602  
#12 Posted : Wednesday, November 25, 2020 2:59:20 AM(UTC)
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Originally Posted by: Zetor1980 Go to Quoted Post
I would like to send video signal from vMix to FB, but also by SRT to 25 receivers (VLC) in classrooms in our school. Is this possible? , any ideas ? Will my computer manage it? I will send one SRT signal or 25 ?


You send 1 SRT stream out...in all the Vlc on the same network use srt://0.0.0.0:[you caller port]
Cannot at this time send SRT to facebook
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