I have to say, I'm getting more comfortable with #systemd services. And I find it fascinating how with its templates and powerful dependency feature I could achieve some wild, very dynamic stacking of @gstreamer, @pipewire, #mpd, #mpv and #SAP / #RFC2974 with only a few lines for various systemd services. So for instance a #multicast SAP announcement of @schenklradio will only appear if something plays on that pipewire device, which only happens if that radio is on air and reachable.

I'm excited about the upcoming, to be expected soon, next major Gluon release based on #OpenWrt 24.10. This will update batman-adv to v2024.3 and by that will add the new batman-adv #multicast packet type. At @ffhl we already tested this and it allowed us to do #IPv6 #multicast (audio) streaming and to reenable and use #mDNS (#RFC6762) and #SAP (#RFC2974). I'm curious what other people might do with it.
#Freifunk

Meine kleine #IPv6 #Multicast Demo mit @videolan und @gstreamer im #Freifunk / @ffhl im Kontext der chaotischen #5MinutenTermine beim @chaotikumev ist mittlerweile online:

https://media.ccc.de/v/2024-07-03-linus-lussing-uber-die-freifunk-freiraumdisko

https://www.youtube.com/watch?v=EL2FJns9iLI

I'm on #Debian #Sid and want to make a library #crossplatform compatible. Any recommendations what I could use for build (+runtime?) testing, without having to install the other, original operating systems on my laptop, without needing closed source software myself?
I want to use that for my small #SAP / #RFC2974 library: https://github.com/T-X/libsap

Starting to feel quite happy about the #SAP library/tool (#RFC2974), at least for the sender part. Sender part should now correctly adhere to bandwidth limits and adjusts its intervals accordingly, as defined by the RFC (which @videolan 's client so far does not?). Also has some initial parsing/listening/status output.
Next: fleshing out the RX part: a listener-only mode, decompression, maybe authentication. And maybe adding a sap_run_noblock() variant.
https://github.com/T-X/libsap
#Multicast

Hacking on #Multicast code is like (</i>): https://botsin.space/@hackers_gifs/112505957003987537
(Both are so nineties? :D Saying that as someone who is currently working on an #SAP / #RFC2974 library...)

Wer nun bei @ffhl einen @videolan / #VLC Player öffnet und auf "Network streams (SAP)" klickt, wird einige neue Streams entdecken.

Wer diese auch abspielen möchte, muss die (kommende) Version 4 des #VLC Players nehmen: https://nightlies.videolan.org/
(bei v4 dann unter "Browser -> My LAN")

Das ganze benutzt u.a.: #Multicast #SAP (#RFC2974) #RTP #Opus #MLD #PIM #IPv6 @gstreamer @pipewire. Und #RaptorQ / #FEC, welches aber nur @gstreamer und noch nicht VLC unterstüzt.

So, started to write an #SAP library + tool (#RFC2974). To announce #multicast media sessions here at #Freifunk: https://github.com/T-X/libsap.
Still a few things to do, but should already be pretty usable.
I'm hoping to maybe add that to @gstreamer at one point.
(but I have zero experience in making a library cross-platform compatible - in fact this was actually the first library I tried writing myself)

Does anyone know if @gstreamer supports #SAP (session announcement protocol, #RFC2974) for #multicast #RTP stream transmissions? Ideally in a way that's compatible with a @videolan (#VLC / #VideoLAN) receiver? Or is there some other, external tool I could feed an #SDP file that announces the #gstreamer multicast stream via SAP?