The VideoLAN Forums

Hello, I searched for this answer on this forum but it seems like no one has answered this.
I understand that IGMP is actually a function of the IP stack and is controlled by the OS or in my case the version of Windows I am running, but I am curious how you can tell VLC what the source IP address is for the multicast group address? Since IGMP v3 has to have a source address as well as a multicast group address to send a v3 join request.
Is this something you have to do via command line (which I never have used) ?
If so, is there any reason why a simple SOURCE: field under the "Open Network Stream" area of the GUI has not been added? The main VLC website does list IGMP V3 as a current feature.
I use lots of video equipment at my job, and 100% of the devices (RGB, Tandberg, etc) that support IGMP v3 joins all have a Group and Source field on the GUI, so that is what I was expecting.

Any help would be much appreciated.

Buller... Buller... Buller...

MLDv2 has the same issue.
Any help would be much appreciated.

I don't know if you already found the answer you are looking for... however, you can find below the syntax for the IGMP v3 join:

PCL://SourceAddress@MulticastGroup:PortNumber

where
-PCL is the protocol used (e.g. "udp" or "rtp")
-SourceAddress is the source for the Multicast (e.g. "192.60.23.12")
-MulticastGroup is the group to be joined (e.g. "225.0.12.69")
-PortNumber is the port used (e.g. "3001")

The final string for a specific multicast stream using UDP on port 2000 would be:

udp://192.168.77.100@225.0.23.150:2000

Depending on the version of VLC you are running, you'll have in the GUI a single text box to declare the address with the syntax described (v.1.1.7)
or a three-boxes string (older versions): in the older versions, ignore the protocol box and the PortNumber box and declare the address with the previously explained syntax in the central box (multicast group).

If you can still join the stream, even after removing the source from the address string, then your system is not using IGMPv3.

I hope this may help.