<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none"></style> </head> <body dir="ltr" style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;"> <p>Hello everybody,<br> </p> <p><br> </p> <p>Some update, actually when I use the above pipelines I get some warnings if I set --gst-debug-level=4<br> </p> <p><br> </p> <div>0:00:08.188353677 10704 031FBAB8 ERROR libav :0:: Input buffer exhausted before END element found</div> <div>0:00:08.188447229 10704 031FBAB8 WARN libav gstavauddec.c:635:gst_ffmpegauddec_frame:<avdec_aac0> avdec_aac: decoding error (len: -1094995529, have_data: 0)<br> </div> <div><br> </div> <div>Any idea why is that error and how it can be handled? I've tried to play with the parameters of the encoding and payloading elements, but no luck so far<br> </div> <div><br> </div> <div>On a side note... I noticed that under Windows 10/Gstreamer 1.12.2, the pipelines which use the default property host="localhost" for udpsink, won't work.<br> </div> <div>The reason is that "localhost" in Windows 10 with IPv6 is treated as the IPv6 ::1 address rather than the 127.0.0.1,</div> <div>and udpsrc bounds to 0.0.0.0 (which bounds only to the IPv4 addresses <span style="font-size: 12pt;">of the system). Hope that saves some time if anyone is working with udpsink/src and Win10</span></div> <div><br> </div> <div>Cheers<br> </div> <div>Martin<br> </div> <div><br> <br> </div> <p><br> </p> <p><br> </p> <div dir="ltr" style="font-size:12pt; color:#000000; background-color:#FFFFFF; font-family:Calibri,Arial,Helvetica,sans-serif"> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Martin Vachovski<br> <b>Sent:</b> Tuesday, September 26, 2017 12:05 PM<br> <b>To:</b> gstreamer-devel@lists.freedesktop.org<br> <b>Subject:</b> AAC/RTP streaming</font> <div> </div> </div> <div> <p>Hello everybody,<br> </p> <p><br> </p> <p>I am trying to implement AAC streaming overt RTP, but the receiving pipeline doesn't play any audio (although it says it goes to PLAYING state). <br> </p> <p>I am using the following pipelines with gstreamer 1.12.2:<br> </p> <p><br> </p> <p>TX:</p> <p>gst-launch-1.0.exe -v audiotestsrc ! audioconvert ! avenc_aac ! rtpmp4apay ! udpsink<br> </p> <p><br> </p> <p>RX:<br> </p> <p>gst-launch-1.0.exe -v udpsrc ! application/x-rtp,clock-rate=44100 ! rtpjitterbuffer ! rtpmp4adepay ! avdec_aac ! audioconvert ! autoaudiosink<br> </p> <p><br> </p> <p>(I have also tried replacing the "<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:16px; background-color:rgb(255,255,255)">avdec_aa</span><span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:16px; background-color:rgb(255,255,255)">c</span>" element with a "decodebin").<br> </p> <p>The pipelines don't report any errors, but the second one doesn't play any sound.<br> </p> <p>I wonder if there is any other setting, caps I need to specify? I know that the Vorbis codec,<br> </p> <p>for instance, needs the DCT coefficients of the transform as extra data when streaming over the network?<br> </p> <p><br> </p> <p>Also, if I merge the two pipelines together (omitting the udpsink/udpsrc pair), the pipeline works:<br> </p> <p>audiotestsrc volume=0.1 ! audioconvert ! avenc_aac ! rtpmp4apay ! application/x-rtp,clock-rate=44100 ! rtpjitterbuffer ! rtpmp4adepay ! avdec_aac ! audioconvert ! wavescope ! videoconvert ! autovideosink<br> </p> <p><br> </p> <p>I have also tried to supply all the CAPS as reported by the SRC pad of "<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:16px; background-color:rgb(255,255,255)">rtpmp4apay </span>" before the "rtpjitterbuffer", still no luck<br> </p> <p>/GstPipeline:pipeline0/GstRtpMP4APay:rtpmp4apay0.GstPad:src: caps = application/x-rtp, media=(string)audio, clock-rate=(int)44100, encoding-name=(string)MP4A-LATM, cpresent=(string)0, config=(string)40002410adca00, payload=(int)96, ssrc=(uint)3854776221, timestamp-offset=(uint)466007625, seqnum-offset=(uint)12210<br> </p> <p><br> </p> <p>Many thanks!<br> </p> <p>Martin<br> </p> <p><br> </p> </div> </div> </body> </html>