<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="Generator" content="Microsoft Exchange Server"> <style></style> </head> <body> <meta content="text/html; charset=UTF-8"> <style type="text/css" style="">  </style> <div dir="ltr"> <div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif"> <p>Hello,</p> <p><br> </p> <p>What if you will stream video container with metadata inside?</p> <p>For example MKV file with subtitles?</p> <p><br> </p> <p>PS sorry for late reply</p> <p><br> </p> <p>Mikl</p> </div> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> gstreamer-devel <gstreamer-devel-bounces@lists.freedesktop.org> on behalf of myamens <mrayyamen@gmail.com><br> <b>Sent:</b> Monday, February 27, 2017 5:10:09 AM<br> <b>To:</b> gstreamer-devel@lists.freedesktop.org<br> <b>Subject:</b> Match RTP packets with decoded image frames</font> <div> </div> </div> </div> <font size="2"><span style="font-size:10pt;"> <div class="PlainText">Hello,<br> <br> I am currently using GStreamer to stream video over network. In my<br> application, I need to perfectly sync data with the video images (zero<br> latency between both data and the corresponding images). <br> Since data size per frame is very small (8 bytes), I am adding this data<br> into the first RTP packet's padding for each encoded frame just before<br> sending it over UDP. On the receiver side, after I receive the packet I<br> extract the data from the RTP padding and save it in a queue. Once the frame<br> is decoded, I pop from the queue the first element which suppose to match<br> the decoded frame. <br> In theory it should work fine, however in practice, the sink can drop some<br> frames which would results mismatching between the frames and the<br> corresponding data in the queue.<br> <br> I am looking for better solutions in which I can perfectly sync between the<br> received RTP packets and the corresponding decoded image frames.<br> <br> I tried to add metadata into the RTP packets on the receiver side, and<br> extract the meta data after decoding, however it didn't work (the metadata<br> is removed apparently). <br> <br> Looking forward for an advice!<br> <br> <br> <br> --<br> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Match-RTP-packets-with-decoded-image-frames-tp4682031.html"> http://gstreamer-devel.966125.n4.nabble.com/Match-RTP-packets-with-decoded-image-frames-tp4682031.html</a><br> Sent from the GStreamer-devel mailing list archive at Nabble.com.<br> _______________________________________________<br> gstreamer-devel mailing list<br> gstreamer-devel@lists.freedesktop.org<br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> </div> </span></font> </body> </html>