<html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> I had to copy the ''single window' command line from another machine and managed to make a few typos. Not the best way to introduce yourself asking for help. The actual working line (now ftped from the working machine) is: gst-launch-1.0 v4l2src ! video/x-raw ! decodebin name=src src. ! xvimagesink src. ! decodebin ! alsasink John <div class="moz-forward-container"> -------- Forwarded Message -------- <table class="moz-email-headers-table" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject: </th> <td>gstreamer and UDP transport</td> </tr> <tr> <th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th> <td>Tue, 4 Apr 2017 21:17:36 -0400</td> </tr> <tr> <th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th> <td>John Hanks <a class="moz-txt-link-rfc2396E" href="mailto:jhanks@vsicorp.com"><jhanks@vsicorp.com></a></td> </tr> <tr> <th align="RIGHT" nowrap="nowrap" valign="BASELINE">Reply-To: </th> <td>Discussion of the development of and with GStreamer <a class="moz-txt-link-rfc2396E" href="mailto:gstreamer-devel@lists.freedesktop.org"><gstreamer-devel@lists.freedesktop.org></a></td> </tr> <tr> <th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th> <td><a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a></td> </tr> </tbody> </table> <meta http-equiv="content-type" content="text/html; charset=utf-8"> I'm trying to use Gstreamer to send 'media' between two systems. My first goal is to take an mp4 file and send it over udp from one system to another. To start, I'm just trying to send it from one window to another on the same system. In a single window, the following command displays the file with audio: gst-launsh-1.0 -v filesrc location=23.mp4 tyepfind=true ! decodebin name=src scr. ! xvimagesink src. ! decodebin ! alsasink I'm trying to use the example from <a moz-do-not-send="true" class="moz-txt-link-freetext" href="https://cgit.freedesktop.org/gstreamer/gst-plugins-good/tree/gst/rtp/README">https://cgit.freedesktop.org/gstreamer/gst-plugins-good/tree/gst/rtp/README</a> line 305 to send the 'media'. That line is: <pre><code>gst-launch-1.0 -v filesrc location=~/data/sincity.mp4 ! qtdemux name=d ! queue ! rtpmp4vpay ! udpsink port=5000 d. ! queue ! rtpmp4gpay ! udpsink port=5002 </code><code></code></pre> <code>My line is </code>gst-launch-1.0 -v filesrc location=23.mp4 typefind=true ! decodebin name=src src. ! videoconvert ! avenc_h263p ! rtph263ppay ! udpsink port=5000 src. ! queue ! rtpmp4gpay ! udpsink port=5002 If just do up to "..udpsink port=5000" it sends the video to the other window listening with this line: gst-launch-1.0 -v udpsrc port=5000 caps = "application/x-rtp\,\ media\=\(string\)video\,\ clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)H263-1998\,\ payload\=\(int\)96\,\ ssrc\=\(uint\)4074303028\,\ timestamp-offset\=\(uint\)1393836595\,\ seqnum-offset\=\(uint\)30484\,\ a-framerate\=\(string\)30" ! rtpjitterbuffer ! rtph263pdepay ! avdec_h263 ! autovideosink When I send the line with just video, the screen displays lots of information ending in: Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock When I send both, it doesn't 'fail' but has this message way up in the text: failed delayed linking some pad of GstDecodeBin named src to some pad of GstRtpMP4GPay named rtpmp4gpay0 It does not seem to be encoding the audio but I'm not sure what to do next. The examples from the page referenced do not work when I try replacing my file with the file given. In fact, no example I have found for sending via udp has worked as shown on the web page - I have always had to tweak something to get it to work at all. This is becoming increasingly frustrating. John </div> </body> </html>