<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="en-RU" link="blue" vlink="purple" style="word-wrap:break-word"> <div class="WordSection1"> Thanks for your reply!<o:p></o:p> <o:p> </o:p> I am trying to fetch 4 rtp sessions from a pcap file in the same pipeline simultaneously.<o:p></o:p> What should I do to keep all sessions in sync?<o:p></o:p> <o:p> </o:p> Thanks in advance,<o:p></o:p> Alexander<o:p></o:p> <o:p> </o:p> <div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"> From: Nathan Stratton <nathan@vocinity.com> Date: Friday, 4 June 2021, 5:13 PM To: Discussion of the development of and with GStreamer <gstreamer-devel@lists.freedesktop.org> Cc: Жаров Александр Николаевич <anzharov@domclick.ru> Subject: Re: GStreamer + pcap SIP call<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> I use:<o:p></o:p> <div> <o:p> </o:p> </div> <div> gst-launch-1.0 filesrc location=out.pcap ! pcapparse dst-port=24384 caps="application/x-rtp,media=(string)video, clock-rate=(int)90000, encoding-name=(string)VP8-DRAFT-IETF-01, payload=(int)96" ! rtpvp8depay ! webmmux ! filesink location=out.webm <o:p></o:p> <div> <div> <div> <div> <div> <div> <div> <div> <o:p> </o:p> </div> <div> ><><o:p> </o:p> </div> <div> Nathan Stratton<o:p></o:p> </div> <div> Founder, CTO<o:p></o:p> </div> <div> Vocinity, Inc. <o:p></o:p> </div> </div> </div> </div> </div> </div> </div> </div> <o:p> </o:p> </div> </div> <o:p> </o:p> <div> <div> On Fri, Jun 4, 2021 at 6:58 AM Жаров Александр Николаевич via gstreamer-devel <<a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>> wrote:<o:p></o:p> </div> <blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm"> <div> <div> Hi all,<o:p></o:p> <o:p></o:p> I am using GStreamer to create a video file from a pcap dump file that contains RTP traffic of SIP calls (2 or 2+ legs). <o:p></o:p> <o:p></o:p> For example,<o:p></o:p> “call123-media.pcap” with 2 legs contains only SIP call media (OPUS + VP8 RTP packets).<o:p></o:p> Pcap captured on one server.<o:p></o:p> Every leg has 1 audio + 2 video (videoIN + videoOUT) streams.<o:p></o:p> <o:p></o:p> Streams start and end at the same time (after trimming the pcap file).<o:p></o:p> <o:p></o:p> I am using the following pipeline for converting:<o:p></o:p> gst-launch-1.0 videomixer name=m background=1 \<o:p></o:p> sink_0::xpos=0 sink_0::ypos=0 sink_0::width=640 sink_0::height=480 \<o:p></o:p> sink_1::xpos=640 sink_1::ypos=0 sink_1::width=640 sink_1::height=480 ! queue ! x264enc tune=zerolatency pass=17 bitrate=768 ! queue \<o:p></o:p> ! mp4mux name=avMux faststart=true ! queue ! filesink location=call123-media.mp4 \<o:p></o:p> rtpbin name=rtpbin \<o:p></o:p> filesrc location=call123-media.pcap ! queue ! tee name=pcapTee \<o:p></o:p> pcapTee. ! queue ! pcapparse src-port=16242 ! application/x-rtp,media=audio,clock-rate=48000,encoding-name=OPUS ! rtpbin. \<o:p></o:p> pcapTee. ! queue ! pcapparse src-port=17234 ! application/x-rtp,media=audio,clock-rate=48000,encoding-name=OPUS ! rtpbin. \<o:p></o:p> pcapTee. ! queue ! pcapparse src-port=16268 ! application/x-rtp,media=video,clock-rate=90000,encoding-name=VP8 ! rtpbin. \<o:p></o:p> pcapTee. ! queue ! pcapparse src-port=17254 ! application/x-rtp,media=video,clock-rate=90000,encoding-name=VP8 ! rtpbin. \<o:p></o:p> \<o:p></o:p> rtpbin. ! rtpjitterbuffer ! rtpopusdepay ! opusdec ! audioconvert ! avenc_aac ! avMux.audio_0 \<o:p></o:p> rtpbin. ! rtpjitterbuffer ! rtpopusdepay ! opusdec ! audioconvert ! avenc_aac ! avMux.audio_1 \<o:p></o:p> rtpbin. ! rtpjitterbuffer ! rtpvp8depay ! vp8dec ! videoscale ! video/x-raw,width=640,height=480 ! m. \<o:p></o:p> rtpbin. ! rtpjitterbuffer ! rtpvp8depay ! vp8dec ! videoscale ! video/x-raw,width=640,height=480 ! m.<o:p></o:p> <o:p></o:p> <o:p></o:p> As a result, I get two video streams, where the first is not started simultaneously with the second. <o:p></o:p> <o:p></o:p> I am getting following results:<o:p></o:p> <ol start="1" type="1"> <li class="gmail-m-6615231938299017390msolistparagraph" style="mso-list:l0 level1 lfo1"> the first stream starts 5 seconds after the start of the second (5 seconds of black screen)<o:p></o:p></li><li class="gmail-m-6615231938299017390msolistparagraph" style="mso-list:l0 level1 lfo1"> the second stream ends 5 seconds after the end of the first <o:p></o:p></li><li class="gmail-m-6615231938299017390msolistparagraph" style="mso-list:l0 level1 lfo1"> video streams are not synchronous<o:p></o:p></li></ol> <o:p></o:p> What wrong with my pipeline?<o:p></o:p> How can I fix that?<o:p></o:p> <o:p></o:p> I tried adding queues but it didn't help. <o:p></o:p> <o:p></o:p> <div> <div> -- <o:p></o:p> Thanks in advance,<o:p></o:p> Alexander<o:p></o:p> </div> </div> <o:p></o:p> </div> </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" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><o:p></o:p> </blockquote> </div> </div> </body> </html>