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Hi,<br>
I'm working on implementing <b>multicast streaming</b> using the <b>Live555 RTSP server</b> (<code>v4l2rtspserver</code>). My current understanding is that when a client sends a
<code>SETUP</code> request for a multicast stream, the server should not initiate a new session each time. Instead, it should reuse the existing multicast session.</div>
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However, in my setup, the server appears to <b>create multiple sessions</b> for the same multicast stream, which is unexpected. Below is an excerpt from the server log:</div>
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<b>🧾 Server Command:</b></div>
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/tmp/v4l2rtspserver /dev/video3 -fHEVC -W1920 -H1080 -P5005 -F60 -M232.22.5.67 -mroutecam_m</div>
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<br>
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<br>
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Log<br>
[NOTICE] Version: 0.3.11-23-gde3c395-dirty live555 version: 2025.01.17</div>
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[NOTICE] Create V4L2 Source... /dev/video3</div>
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[NOTICE] RTP address 232.22.5.67:20000</div>
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[NOTICE] RTCP address 232.22.5.67:20001</div>
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[NOTICE] RTP format: video/H265</div>
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[NOTICE] Play this stream using the URL "rtsp://192.168.1.10:5005/routecam_m"</div>
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<br>
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handleCmd_SETUP: SETUP rtsp://192.168.1.10:5005/routecam_m/track1 RTSP/1.0</div>
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Transport: RTP/AVP;multicast</div>
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...</div>
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handleCmd_SETUP: SETUP rtsp://192.168.1.10:5005/routecam_m/track1 RTSP/1.0</div>
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Transport: RTP/AVP;multicast</div>
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...</div>
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<b>My Question</b></div>
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Why is the server initiating a new session for each <code>SETUP</code>, even though the transport is multicast? Shouldn’t Live555 be reusing the same multicast subsession for all clients?</div>
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Any guidance or configuration pointers would be greatly appreciated.<br>
<br>
<br>
Regards,<br>
Manikandan</div>
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