IPv6 Multicast stream not opened

[Marpione]

Hi, I hope not to produce a double post, but could not find a match in the forum (nor anywhere in the web).

I'm currently trying to push IPv6 Mcast streams through the network, but the receiver does not seem to be able to open the stream.
tcpdump shows me the traffic is arriving on the box, but it's simply not picked up by the client.

Any hints where to further look into are very appreciated, e.g. is there a debug command to see whether VLC recognizes at all the packet on the port it should be reading ?

Server:
vlc -vvv /<path>/<file>.mp4 --sout '#rtp{access=udp,mux=ts,dst=ff3e::111}' --ttl 12 --miface=eth0.14
(Also tried with .mp3 files, but had no success)

Receiver:
vlc-vvv rtp://[source]@[FF3E::111]


Some of the last verbode outputs:
...
[0x7f1d30000d10] main input debug: `rtp://[<source>]@[FF3E::111]' gives access `rtp' demux `' path `[<source>]@[FF3E::111]'
[0x7f1d30000d10] main input debug: creating demux: access='rtp' demux='' path='[<source>]@[FF3E::111]'
[0x7f1d28001230] main demux debug: looking for access_demux module: 1 candidate
[0x7f1d28001230] main demux debug: net: connecting to [<source>]:0 from [FF3E::111]:5004
[0x7f1d28001230] main demux debug: Multicast source group join request
[0x7f1d28001230] main demux debug: using access_demux module "rtp"
[0x7f1d28001230] main demux debug: TIMER module_need() : 7.877 ms - Total 7.877 ms / 1 intvls (Avg 7.877 ms)
[0x7f1d280022a0] main demux meta debug: looking for meta reader module: 2 candidates
[0x7f1d280022a0] lua demux meta debug: Trying Lua scripts in /home/<bla>/.local/share/vlc/lua/meta/reader
[0x7f1d280022a0] lua demux meta debug: Trying Lua scripts in /usr/lib64/vlc/lua/meta/reader
[0x7f1d280022a0] lua demux meta debug: Trying Lua playlist script /usr/lib64/vlc/lua/meta/reader/filename.luac
[0x7f1d280022a0] lua demux meta debug: Trying Lua scripts in /usr/share/vlc/lua/meta/reader
[0x7f1d280022a0] main demux meta debug: no meta reader module matching "any" could be loaded
[0x7f1d280022a0] main demux meta debug: TIMER module_need() : 0.719 ms - Total 0.719 ms / 1 intvls (Avg 0.719 ms)
[0x7f1d30000d10] main input debug: `rtp://[<source>]@[FF3E::111]' successfully opened

[Jean-Baptiste Kempf]

Seems all normal.

[Marpione]

Thanks JB.

Can you confirm that VLC should be able to listen to IPv6 streams with global IPv6 source address and IPv6 SSM destination?
Or is there a limitation that VLC only listens to link-local sources ?

Reason I'm asking is that I attached a Windows PC into the receiving LAN as well, but VLC does not play the stream either (whereas the sender does).
Wireshark captures the mcast packets, but the flow stats within VLC show all 0.

Anything I could have missed the VLC requires to recognize the packets?
The Windows box is using VLC 2.0.1.

Thanks

[Rémi Denis-Courmont]

Firewall, routing table, addresses, port numbers. Lots of things can go wrong.