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Martin Block  
#1 Posted : Thursday, August 6, 2020 11:20:30 AM(UTC)
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Hi,

I am trying to work with SRT for the first time.
I watched all tutorials but even when I follow all instructions to the letter, nothing happens.

I have the Larix iOS app and I am connected to my Wifi network A.
I set up the SRT connection to the public IP of my vMix PC, running on my network B, using port 11001.
On my vMix PC, I enabled SRT in Settings and selected Rendezvous mode with hostname being the public IP of my network A and I also selected port 11001 (should not matter that it is the same)
I also selected the same in the input settings (public IP of my network A and I also selected port 11001)

I disabled the firewall in my router (there is no port forwarding feature)
Unfortunately, nothing happens.

Anybody knows what I am doing wrong?

Thanks in advance

Cheers
admin  
#2 Posted : Thursday, August 6, 2020 1:01:19 PM(UTC)
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vMix will need to be set to Listener mode for SRT, as Larix does not connect using Rendezvous
thanks 1 user thanked admin for this useful post.
eduardocfs on 8/8/2020(UTC)
Martin Block  
#3 Posted : Thursday, August 6, 2020 1:51:02 PM(UTC)
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Thanks. I tried that as well with the same result...
Martin Block  
#4 Posted : Thursday, August 6, 2020 2:00:05 PM(UTC)
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I go to general settings and make vMix listener
Then I create and input and set this as well to listen with the same port. (Most of the time I get an error listening on SRT socket message) but after trying various time
and clearing old settings it will accept the input.
But then, still no feed being received from Larix....
dmwkr  
#5 Posted : Thursday, August 6, 2020 2:54:25 PM(UTC)
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As both are on the same network, I'd try a connection to the local IP first. If it's still not working, there's a Larix/vMix configuration issue to work out, otherwise a router/firewall issue.
Martin Block  
#6 Posted : Thursday, August 6, 2020 3:10:36 PM(UTC)
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thank you. when I connected it to the local network. It worked.
But still not when I want to connect from the "outside" network.
Any ideas?
Peter1000  
#7 Posted : Thursday, August 6, 2020 3:39:39 PM(UTC)
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PM me, i try to help

SRT connection manual

EDIT:
I've adjusted the ports in the Wiki. I hope the community can approve port 52001.
Martin Block  
#8 Posted : Thursday, August 6, 2020 5:16:59 PM(UTC)
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Thanks very much. I have a couple of meetings coming up, so I will first try again with the manual you sent.
If I still have issues, I will definitely PM you :-)

Cheers
Peter1000  
#9 Posted : Thursday, August 6, 2020 8:22:10 PM(UTC)
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the port has to be the same on both sides.
i think 11001 is used for something else.
try using ports from 52000 on upwards, and open these in your Router. If you open Ports in this range, you help also vMixcall to make peer to peer connections.
elvis55  
#10 Posted : Friday, August 7, 2020 3:08:38 AM(UTC)
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Originally Posted by: Peter1000 Go to Quoted Post
the port has to be the same on both sides.
i think 11001 is used for something else.
try using ports from 52000 on upwards, and open these in your Router. If you open Ports in this range, you help also vMixcall to make peer to peer connections.


Nur eine kleine Anmerkung. Ich Denke, der in Ihrem Manual empfohlene Port 1935 UDP ist auch nicht ideal.
Der Port 1935 ist normalerweise der Standard Port für RTMP
Gut, wenn niemand RTMP benutzt, kann es für SRT funktionieren.
Habe es nicht getestet, da ich noch einen RTMP Server auf meinem PC verwende.


Just a small note. I think the port 1935 UDP recommended in your manual is not ideal either.
Port 1935 is usually the standard port for RTMP
Well, if no one is using RTMP, it can work for SRT.
Didn't test it as I still use an RTMP server on my PC.

List of standardized ports.
thanks 2 users thanked elvis55 for this useful post.
doggy on 8/7/2020(UTC), Paul Fuhrmann on 10/21/2020(UTC)
Peter1000  
#11 Posted : Friday, August 7, 2020 5:49:43 AM(UTC)
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exactly for this reason is mentioned in almost all SRT manuals port 1935. 1935 is defined for videotransport.
For us, all ports work for SRT from 1931-1951. but because of vmixcall, we switched to ports above 52000. this was done in the same move.
elvis55  
#12 Posted : Friday, August 7, 2020 6:29:28 AM(UTC)
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Originally Posted by: Peter1000 Go to Quoted Post
exactly for this reason is mentioned in almost all SRT manuals port 1935. 1935 is defined for videotransport.
For us, all ports work for SRT from 1931-1951. but because of vmixcall, we switched to ports above 52000. this was done in the same move.


Well, if you say that, it will be so.
I have now looked at a few instructions, and none of them found a reference to port 1935 for SRT.


Port (Default 9710) - Port at which data is sent or pulled from. These ports must be open (outgoing or incoming) on your network for data to flow properly


In the use case described here the sender/source will run in calling mode reading UDP multicast from 224.0.0.1 port 2244 and writing SRT to hjortsberg.org on port 6600. The receiver will run in listening mode reading SRT from port 6600 and writing UDP multicast to 224.0.0.1 port 2255. So the UDP stream goes from caller to listener

Enter the port number (must be between 1 and 65535)

SRT_Alliance_Deployment_Guide

Seite 18
Follo  
#13 Posted : Friday, August 7, 2020 9:52:15 AM(UTC)
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Hey Martin,

have you forwarded the port from your Router to the IP from the vMix machine?

1. set a stic IP for your vMix Computer or go into the router settings and check if the vMix computer will get the same IP everytime.(example: 192.168.0.10).
2. the go into your router settings an forward the port that you using for srt to the IP from your vmix Computer.
3. Set vMix srt to listener.
4. stream with latrix Broadcaste as a caller to the public internet IP (WAN from your router)

That should work then.

I hope this helps you..



Paul Fuhrmann  
#14 Posted : Wednesday, October 21, 2020 1:01:54 AM(UTC)
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Had anyone of this group a funktional SRT Input connection with IPv6?

I tried Larix Boradcaster within local Network-Wifi wich works great.
Just send to srt://192.168.0.248:5000 also funktional settings for passphrase and keylenght.

I the tried to set to a local IPv6 address srt:[fe80::f4ef:c7f6:cfa2:67dc%4]:5000 but it wont work. fe80 Adresses are lokal subnet ipv6 only.


Why i tried that? Unfortunatly iam a cable docsis3.1 client wich is shared media and a bunch people share the publip ipv4 adress and iam not allowed to set any port forwarding.
Wich brought me to the idea to use an IPv6 Adress wich is unique in the internert. But it seem not to work in the local lan,

This leaves the question weather vMix is possible of recieving srt via IPv6 or does es just work ipv4 based. (it should work on both because after the nic resolution data is handled portwise in windows to the aplication)
But maybe an iphone is not capable of ipv6 wia wifi.

Has anyone a other solution of sending srt for testing?

Greetings Paul

ask  
#15 Posted : Thursday, October 22, 2020 7:25:04 AM(UTC)
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There is a bug in SRT support for IPv6 which appears to be fixed in the upcoming SRT release. Note that this is not a vMix issue but an SRT issue.

https://github.com/Haivision/srt/issues/1371
Paul Fuhrmann  
#16 Posted : Saturday, October 24, 2020 6:56:44 PM(UTC)
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Hello ask,

I have read this issue on github too. But i also questioned the larix team about this. The Larix replay was that this should work, but i also have the feeling they only inserted the srt framework in thier app.

Good to know.

Greetings Paul
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