<div dir="ltr">3 things (actually a lot more) can prevent you from receiving UDP packets that you can see arrive with tcpdump: <ol><li>UDP packets arriving on an interface from a source where the route to the source is routed via another interface.</li><li>iptables fw-rule.</li><li>Multiple listeners on same port without SO_REUSEADDR/SO_REUSEPORT. See also <a href="http://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t">http://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t</a></li></ol>RegardsPeter Maersk-Moller </div><div class="gmail_extra"> <div class="gmail_quote">On Thu, Feb 9, 2017 at 9:33 PM, twallis <<a href="mailto:twallis@deeptrekker.com" target="_blank">twallis@deeptrekker.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello, I know that this is a semi-common issue, at least for gstreamer beginners like myself, however I am running into an interesting issue on my embedded linux application. Using gstreamer 1.6.3 (due to sdk/support reasons from TI) I am trying to receive an mjpg stream from my ip camera. When I check the tcpdump on hte port the camera is sending to, I see it fine, and when I launch gst-launch-1.0 udpsrc port=1234, and try to send the stream to a file-sink, I receive nothing in the file I'm trying to send it to. I've already read through the solution found here: <a href="http://gstreamer-devel.966125.n4.nabble.com/udpsrc-has-no-data-for-windows-td4678014.html" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/udpsrc-has-no-data-for-windows-td4678014.html</a> and ran into significant errors attempting to install 1.8.1 (and newer) from source. As that's the other issue, my embedded system does not have dpkg, or apt! Everything must be compiled from source! Thank you for your help -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Raw-UDP-packets-not-being-picked-up-by-udpsrc-tp4681796.html" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Raw-UDP-packets-not-being-picked-up-by-udpsrc-tp4681796.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>