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<p class="MsoNormal"><span lang="DA">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DA"><o:p> </o:p></span></p>
<p class="MsoNormal">I’m trying to evaluate the latency for a simple pipeline: H264 encoding and transmission via RTP/UDP<o:p></o:p></p>
<p class="MsoNormal">My pipeline is:<o:p></o:p></p>
<p class="MsoNormal">gst-launch-1.0 -v v4l2src device=/dev/video0 ! 'video/x-raw, format=(string)I420, width=(int)640, height=(int)480' ! omxh264enc bitrate=1000000 control-rate=2 ! h264parse ! rtph264pay ! udpsink host=X.X.X.X port=9078<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I read about this post on stackoverflow <o:p></o:p></p>
<p class="MsoNormal"><a href="https://stackoverflow.com/questions/23869562/how-can-i-quantitatively-measure-gstreamer-h264-latency-between-source-and-displ">https://stackoverflow.com/questions/23869562/how-can-i-quantitatively-measure-gstreamer-h264-latency-between-source-and-displ</a>
<o:p></o:p></p>
<p class="MsoNormal">And the latency clock project seems interesting.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, before trying it out I’d like to make sure there’s not a more simple solution (I’m not looking for latency of encoding but that of network)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m monitoring the traffic via Wireshark on the receiver side.<o:p></o:p></p>
<p class="MsoNormal">So I can easily access the timestamp of the rtp packet and compare it to the timestamps when it was received.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Assuming my 2 computers (sender and receiver) are roughly on the same clock, is there a way to set the timestamp on the receiver to the time the packet is issued?<span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal">I saw one option for rtph264 is to set timestamps-offset but not sure how to use that (as far as gst-inspect can tell timestamps is only readable for rtph264pay).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help is appreciated!<o:p></o:p></p>
<p class="MsoNormal">Claire<o:p></o:p></p>
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