<div dir="ltr"><div>or </div><div> </div><div>gst-launch-1.0 uridecodebin uri=rtp://localhost:5554?encoding-name=H264 ! vaapipostproc ! kmssink </div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 28 Jul 2020 at 15:45, Marc Leeman <<a href="mailto:marc.leeman@gmail.com">marc.leeman@gmail.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div> </div><div>Also, do not send RTP data over odd ports.</div><div> </div><div>You should use even ports (RFC 3550) and leave the odd port (port+1) for RTCP.</div><div> </div><div>If you're using GStreamer git or the pre-release, you can simplify the pipeline to</div><div> </div><div>gst-launch-1.0 rtpsrc uri=rtp://localhost:5554?encoding-name=H264 ! rtph264depay ! vaapih264dec low-latency=true ! vaapipostproc ! kmssink</div><div> </div><div>it will also plug in SSRC demultiplexing (amongst others) and send RTCP to allow clock domain transfer from the sender to receiver.</div><div> </div><div> </div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 28 Jul 2020 at 15:30, Timtchenko, Michael <<a href="mailto:Michael.Timtchenko@agcocorp.com" target="_blank">Michael.Timtchenko@agcocorp.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> <div lang="DE"> <div> Hi all, sorry 4 my late response. I had a lot of work during the last two weeks. I want to thank Nicolas and Victor for fast response and very good input! I fixed the issue by using a rtpjitterbuffer in combination with the low-latency flag. Without the rtpjitterbuffer the image is getting teared. So I guess it’s necessary in this case. The following pipeline works quite well in my case: gst-launch-1.0 udpsrc port=55555 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! rtpjitterbuffer latency=10 ! rtph264depay ! vaapih264dec low-latency=true ! vaapipostproc ! kmssink Timestamping the sink did not improve the misbehavior. Best regards, Michael Von: gstreamer-devel [mailto:<a href="mailto:gstreamer-devel-bounces@lists.freedesktop.org" target="_blank">gstreamer-devel-bounces@lists.freedesktop.org</a>] Im Auftrag von Nicolas Dufresne Gesendet: Donnerstag, 16. Juli 2020 14:33 An: Discussion of the development of and with GStreamer <<a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a>> Betreff: [External] Re: Streaming freezes (vaapi or v4l2src) <div> <div> <div> <div> Le jeu. 16 juill. 2020 04 h 00, Timtchenko, Michael <<a href="mailto:Michael.Timtchenko@agcocorp.com" target="_blank">Michael.Timtchenko@agcocorp.com</a>> a écrit : </div> <blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt"> <div> <div> Hello guys, i’ve encountered a very strange behavior while streaming from a v4l2src to a kmssink (or glimagesink) by using vaapi-components for decoding. The problem is, that the streaming starts for 2 seconds, then freezes for 2 seconds and continues again for 2 seconds and so on. This effect is only noticeable when using vaapi-components. If I use a pipeline with simply software decoding, the stream is displayed fluently. </div> </div> </blockquote> </div> </div> <div> Two seconds could be the key frame distance ? </div> <div> </div> <div> </div> <div> <div> <blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt"> <div> <div> My sending pipeline is constructed as follows: gst-launch-1.0 v4l2src io-mode=dmabuf device=/dev/video$(($1+4)) ! video/x-raw,format=YV12,width=720,height=576 ! v4l2h264enc ! rtph264pay ! udpsink host=${IP} port=55555 </div> </div> </blockquote> </div> </div> <div> v4l2h264enc has this extra-controls property that let you genetically change he specific configuration, just an information. </div> <div> </div> <div> </div> <div> <div> <blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt"> <div> <div> Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock Redistribute latency... The erroneous reading pipeline looks like this: gst-launch-1.0 udpsrc port=55555 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! rtph264depay ! vaapih264dec ! vaapipostproc width=720 height=576 ! glimagesink </div> </div> </blockquote> </div> </div> <div> </div> <div> One thing to note is the absence of rtpjitterbuffer element, which would allow adding some latency to remove network jitter. So that is one thing to try. </div> <div> </div> <div> Another possibility is that the issue is cause by vaaph264dec having more latency then avdec_h264. Perhaps give the low-latency property a try ? </div> <div> </div> <div> Let's hope one of these suggestions helps. </div> <div> </div> <div> <div> <blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt"> <div> <div> Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Got context from element 'vaapipostproc0': gst.vaapi.Display=context, gst.vaapi.Display=(GstVaapiDisplay)"$GstVaapiDisplayDRM$\ vaapidisplaydrm1"; Setting pipeline to PLAYING ... New clock: GstSystemClock Redistribute latency... WARNING: from element /GstPipeline:pipeline0/GstKMSSink:kmssink0: A lot of buffers are being dropped. Additional debug info: ../libs/gst/base/gstbasesink.c(3005): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstKMSSink:kmssink0: There may be a timestamping problem, or this computer is too slow. WARNING: from element /GstPipeline:pipeline0/GstKMSSink:kmssink0: A lot of buffers are being dropped. Additional debug info: ../libs/gst/base/gstbasesink.c(3005): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstKMSSink:kmssink0: There may be a timestamping problem, or this computer is too slow. If I run the following pipeline on the same system, the stream is presented fluently without any problems: gst-launch-1. 0 udpsrc port=55555 caps=\"application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96\" ! rtph264depay ! avdec_h264 ! decodebin ! videoconvert ! kmssink I’m not sure what exactly the problem is. Maybe the timestamping mechanism in vaapi has a different behavior then in the avdec_h264 as the log message says? I’ve also changed log levels but I couldn’t find anything helpful. Any help for further diagnostics is highly appreciated. 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Neither AGCO nor the sender accepts any responsibility for viruses and it is your responsibility to scan and virus check the e-mail and its attachment(s) (if any). . . , . . . </div> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">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 dir="ltr">g. Marc</div> </blockquote></div> -- <div dir="ltr" class="gmail_signature">g. Marc</div>