<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> Hi Nicolas,<br> I agree that I would like to do is not public. But if we execute "gst-inspect-1.0 rtpbin", we have an "element action" (get-internal-session) which returns a RTPSession. In a previous mail, I mentioned that include files to use RTPSession related stuff are not present in libgstreamer-plugins-good1.0-dev package.<br> <br> What I am trying to do is to implement RTCP AVB (type 208) packets (IEEE1733, see <a class="moz-txt-link-freetext" href="http://www.networksorcery.com/enp/protocol/rtcp.htm">http://www.networksorcery.com/enp/protocol/rtcp.htm</a> for instance). For that, my first idea was to use APP packets to transmit AVB data from a talker to listeners, in order that talker and listeners no longer use NTP, but PTP clock.<br> <br> As it's pretty urgent, I wanted to avoid developing gstreamer extensions (anyway I do not have the skills for that). That's why I try to use on-sending-rtcp signal, to retrieve before they are sent the buffers of RTCP packets, and in them, to add APP packets with the sequence of function calls, indicated in my mail.<br> <br> Would there be other ways to do that?<br> Best<br> Philippe<br> <br> Le 19/01/2019 à 17:38, Nicolas Dufresne a écrit :<br> <blockquote type="cite" cite="mid:b3c186ee083e9675ae49e232920058f0695461fb.camel@ndufresne.ca"> <pre class="moz-quote-pre" wrap="">Le samedi 19 janvier 2019 à 17:06 +0100, Philippe Lalevée a écrit : </pre> <blockquote type="cite"> <pre class="moz-quote-pre" wrap="">Hello I still have problems when using on-sending-rtcp/on-receiving signals (I would like to send RTCP packets of APP type). </pre> </blockquote> <pre class="moz-quote-pre" wrap=""> The RTPSession API isn't public, I'm not sure it is correct to use this from an application. I believe you should better describe what you are trying to do. It might be described in the original thread, but you seem to have create a new thread, which means it's harder to find the context. regards, Nicolas </pre> <blockquote type="cite"> <pre class="moz-quote-pre" wrap=""> After having configured callbacks both for these signals (on the rtpsession object as mentioned by Sebastian) and for probes in rtcp pads, I have the following behavior on the talker side: in the two callbacks, I only have RR and SDES packets, and never SR packets, while I see SR packets with the probe callback, and whereas I see them in the listener side in the "on_receiving_rtcp" callback. Symmetrically, I have the same problem on the listener side. Another problem is that APP packets are not transmitted from the talker to the listener. Here is shortened the sequence of instructions called in the on-sending-rtcp callback function: - gst_rtcp_buffer_map(buffer, GST_MAP_READWRITE, &rtcp) - gst_rtcp_buffer_add_packet(&rtcp, GST_RTCP_TYPE_APP, &packet) - gst_rtcp_packet_app_set_subtype(&packet, subtype) - gst_rtcp_packet_app_set_ssrc(&packet, ssrc) - gst_rtcp_packet_app_set_name(&packet, name) - gst_rtcp_packet_app_set_data_length (&packet, len) - data = gst_rtcp_packet_app_get_data(&packet) - GST_WRITE_UINT32_BE(data, value) - ... - return TRUE Do I have to do something special at the end of the function, before the return instruction, for the packet to be taken into account? otherwise what could be the problem? </pre> </blockquote> <pre class="moz-quote-pre" wrap=""> Did you unmap you RtcpBuffer ? What is this function you are implementing ? What is it supposed to do ? </pre> <blockquote type="cite"> <pre class="moz-quote-pre" wrap=""> Thank you for your help Philippe Lalevée _______________________________________________ gstreamer-devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> <pre class="moz-quote-pre" wrap=""> </pre> </blockquote> <br> <div class="moz-signature">-- <br> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <table style="border-collapse: collapse; border: 1px solid rgb(221,
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