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[wiki] add sap/sdp s,g (via 172.23.199.110)

IEDON.DN42 Wiki Mirror(125) committed 2026-08-14 06:14:16 +0200 commit 500caae76998bd4fa402025ad275824e2ec97d24

				howto/multicast.md
			
          @@ -138,6 +138,8 @@ a=type:broadcast

           a=source-filter: incl IN IP6 ff3e::8232:232 fd40:cc1e:c0de::fffe

           ```

          +also there is low bandwidth sap/sdp announcements of the format (sometimes 96k-24b, sometimes 48k-16b, ect) to 172.23.199.110,232.2.3.1:9875 that needs altering in terms of addresses embedded within, however vlc can pick it up

          +

           The stream can then be streamed with `ffplay -protocol_whitelist file,fd,udp,rtp -fflags +genpts /path/to/sdp_file` or mplayer or vlc.

           the actual [RFC 8866](https://datatracker.ietf.org/doc/html/rfc8866)-sdp could be extracted from [RFC 2974](https://datatracker.ietf.org/doc/html/rfc2974)-sap... when its not aes67 (rtp+sap+sdp) then it may be [scream](https://github.com/duncanthrax/scream)

...	...	@@ -138,6 +138,8 @@ a=type:broadcast
138	138	a=source-filter: incl IN IP6 ff3e::8232:232 fd40:cc1e:c0de::fffe
139	139	```
140	140
	141	+also there is low bandwidth sap/sdp announcements of the format (sometimes 96k-24b, sometimes 48k-16b, ect) to 172.23.199.110,232.2.3.1:9875 that needs altering in terms of addresses embedded within, however vlc can pick it up
	142	+
141	143	The stream can then be streamed with `ffplay -protocol_whitelist file,fd,udp,rtp -fflags +genpts /path/to/sdp_file` or mplayer or vlc.
142	144
143	145	the actual [RFC 8866](https://datatracker.ietf.org/doc/html/rfc8866)-sdp could be extracted from [RFC 2974](https://datatracker.ietf.org/doc/html/rfc2974)-sap... when its not aes67 (rtp+sap+sdp) then it may be [scream](https://github.com/duncanthrax/scream)