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Forgot to attach the zip.</div>
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Paul Westlund</div>
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Software Lead | <b>Current Scientific Corporation</b></div>
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<a href="mailto:paul.westlund@currentcorp.com" id="OWA135a4967-515b-e6e0-52ce-49c1888e74d0" class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_OWAAutoLink" title="mailto:paul.westlund@currentcorp.com" data-ogsc="blue" data-linkindex="0" style="color: blue; margin: 0px;"><u>paul.westlund@currentcorp.com</u></a></div>
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<a href="http://www.currentcorp.com/" id="OWAebf3b111-de3d-0568-f0ba-1b0a2b499ec5" class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_OWAAutoLink" title="http://www.currentcorp.com/" data-ogsc="" data-linkindex="1" data-auth="NotApplicable" style="margin: 0px;"><u>www.currentcorp.com</u></a></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Paul Westlund <paul.westlund@currentcorp.com><br>
<b>Sent:</b> Wednesday, November 4, 2026 7:55 AM<br>
<b>To:</b> live-devel@lists.live555.com <live-devel@lists.live555.com><br>
<b>Subject:</b> ffprobe over UDP gets 461 from testOnDemandRTSPServer (2026.10.29)</font>
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Hello,</div>
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I can't get ffmpeg to stream over UDP from a default build of 2026.10.29. I built live555 as it comes (genMakefiles linux-64bit, then make), ran testProgs/testOnDemandRTSPServer with a test.264 next to it, and then ran:</div>
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ffprobe -rtsp_transport udp rtsp://127.0.0.1:8554/h264ESVideoTest</div>
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The SETUP gets "461 Unsupported Transport". Without -rtsp_transport udp, ffmpeg falls back to TCP and plays fine.</div>
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ffmpeg asks for "RTP/AVP/UDP" in its Transport header, and the same SETUP with "RTP/AVP" instead is accepted, so it seems to be the "/UDP" that's rejected. I may be missing something, though.</div>
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The attached zip has a script that runs these steps from scratch, and its output (ffmpeg 6.1.1, Ubuntu 24.04).</div>
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Thanks,</div>
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Paul Westlund</div>
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Software Lead | <b>Current Scientific Corporation</b></div>
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<a href="mailto:paul.westlund@currentcorp.com" id="OWA135a4967-515b-e6e0-52ce-49c1888e74d0" class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_OWAAutoLink" title="mailto:paul.westlund@currentcorp.com" data-ogsc="blue" data-linkindex="0" style="color:blue; margin:0px"><u>paul.westlund@currentcorp.com</u></a></div>
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<a href="http://www.currentcorp.com/" id="OWAebf3b111-de3d-0568-f0ba-1b0a2b499ec5" class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_OWAAutoLink" title="http://www.currentcorp.com/" data-ogsc="" data-linkindex="1" data-auth="NotApplicable" style="margin:0px"><u>www.currentcorp.com</u></a></div>
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