<div dir="ltr">It means you are streaming sterao audio as an opus encoded and RTP encapsulated stream. </div><div class="gmail_extra"> <div class="gmail_quote">On Wed, Jul 19, 2017 at 10:54 PM, TouchOfDestiny <<a href="mailto:davide.caldelari@gmail.com" target="_blank">davide.caldelari@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, thank you very much for your replies. This is what I have with the "-v" option. i slightly modify the command line parameters, since I don't need any video, only OPUS audio: /gst-launch-1.0 -v alsasrc ! audio/x-raw,channels=2,rate=48000 ! audioconvert dithering=0 ! opusenc bitrate=256000 ! rtpopuspay ! udpsink host=127.0.0.1 port=8002 &/ And this is the result (I'm sorry, but I don't understand very well what this all means): /Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstAudioSrcClock /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0: actual-buffer-time = 200000 /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0: actual-latency-time = 10000 /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0.GstPad:src: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)48000\,\ channels\=\(int\)2\,\ channel-mask\=\(bitmask\)0x0000000000000003" /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)48000\,\ channels\=\(int\)2\,\ channel-mask\=\(bitmask\)0x0000000000000003" /GstPipeline:pipeline0/GstAudioConvert:audioconvert0.GstPad:src: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)48000\,\ channels\=\(int\)2\,\ channel-mask\=\(bitmask\)0x0000000000000003" /GstPipeline:pipeline0/GstOpusEnc:opusenc0.GstPad:sink: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)48000\,\ channels\=\(int\)2\,\ channel-mask\=\(bitmask\)0x0000000000000003" /GstPipeline:pipeline0/GstAudioConvert:audioconvert0.GstPad:sink: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)48000\,\ channels\=\(int\)2\,\ channel-mask\=\(bitmask\)0x0000000000000003" /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)48000\,\ channels\=\(int\)2\,\ channel-mask\=\(bitmask\)0x0000000000000003" Redistribute latency... /GstPipeline:pipeline0/GstOpusEnc:opusenc0.GstPad:src: caps = "audio/x-opus\,\ multistream\=\(boolean\)false\,\ streamheader\=\(buffer\)\<\ 4f707573486561640102000080bb0000000000\,\ 4f707573546167731e000000456e636f6465642077697468204753747265616d6572204f707573656e630000000001\ \>" /GstPipeline:pipeline0/GstRtpOPUSPay:rtpopuspay0.GstPad:src: caps = "application/x-rtp\,\ media\=\(string\)audio\,\ clock-rate\=\(int\)48000\,\ encoding-name\=\(string\)X-GST-OPUS-DRAFT-SPITTKA-00\,\ payload\=\(int\)96\,\ ssrc\=\(uint\)2976569488\,\ timestamp-offset\=\(uint\)3934898579\,\ seqnum-offset\=\(uint\)2879" /GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps = "application/x-rtp\,\ media\=\(string\)audio\,\ clock-rate\=\(int\)48000\,\ encoding-name\=\(string\)X-GST-OPUS-DRAFT-SPITTKA-00\,\ payload\=\(int\)96\,\ ssrc\=\(uint\)2976569488\,\ timestamp-offset\=\(uint\)3934898579\,\ seqnum-offset\=\(uint\)2879" /GstPipeline:pipeline0/GstRtpOPUSPay:rtpopuspay0.GstPad:sink: caps = "audio/x-opus\,\ multistream\=\(boolean\)false\,\ streamheader\=\(buffer\)\<\ 4f707573486561640102000080bb0000000000\,\ 4f707573546167731e000000456e636f6465642077697468204753747265616d6572204f707573656e630000000001\ \>" /GstPipeline:pipeline0/GstRtpOPUSPay:rtpopuspay0: timestamp = 3934898579 /GstPipeline:pipeline0/GstRtpOPUSPay:rtpopuspay0: seqnum = 2879 / -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Streaming-in-stereo-in-OPUS-tp4683854p4683868.html" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Streaming-in-stereo-in-OPUS-tp4683854p4683868.html</a> <div class="HOEnZb"><div class="h5">Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">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> </div></div></blockquote></div> </div>