<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-US link=blue vlink=purple><div class=WordSection1>Hello,<o:p></o:p><o:p> </o:p>What kind of audio are you trying to transcode to AAC? <o:p></o:p><o:p> </o:p>I have had to transcode audio before and what I had to do was parse it, decode then audioconvert it.<o:p></o:p><o:p> </o:p>So something like this (appropriate for what kind of audio input you have).<o:p></o:p><o:p> </o:p>d.audio ! aacparse ! avdec_aac ! audioconvert ! voaacenc bitrate=128000 ! flvmux streamable=true name=mux ! rtmpsink location="rtmp://<a href="http://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w">live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w</a>"<o:p></o:p><o:p> </o:p>Regards,<o:p></o:p>Rand<o:p></o:p><o:p> </o:p>From: gstreamer-devel [mailto:gstreamer-devel-bounces@lists.freedesktop.org] On Behalf Of Thierry Gayet Sent: Tuesday, October 29, 2019 12:45 PM To: gstreamer-devel@lists.freedesktop.org Subject: AUDIO GSTREAMER PIPELINE<o:p></o:p><o:p> </o:p><div><div><div><div>Hi guys, I use the module GStreamer gstcefsrc (<a href="https://github.com/centricular/gstcefsrc">https://github.com/centricular/gstcefsrc</a>) to grab a website and generate an audio and video stream. This module is based on an embedded version of chromium (CEF aka embedded chromium). My problem is related I think about the structure of my pipeline. Indeed, this module GStreamer generates a stream containing audio and video. Needing to transcode audio in AAC and video in H264, I demux via a second module cefdemux. Once both A / V streams are transcoded and synchronized, I need to send them via RTMP (rtmpsink) or RTSP (rtspclientsink). The video goes well but the sound is a problem because nothing happens. My actual pipeline is as follows: gst-launch-1.0 cefsrc url="<a href="https://soundcloud.com/platform/sama">https://soundcloud.com/platform/sama</a>" ! queue ! cefdemux name=d d.video ! video/x-raw,format=BGRA,framerate=30/1 ! queue ! videoconvert ! x264enc bitrate=2500 tune=zerolatency pass=5 quantizer=22 speed-preset=superfast key-int-max=60 ref=2 ! mux. d.audio ! audio/x-raw ! audiorate ! queue ! audioconvert ! voaacenc bitrate=128000 ! flvmux streamable=true name=mux ! rtmpsink location="rtmp://<a href="http://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w">live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w</a>" It does not work! If I test with another audio test source it works: gst-launch-1.0 cefsrc url="<a href="https://soundcloud.com/platform/sama">https://soundcloud.com/platform/sama</a>" ! queue ! cefdemux name=d d.video ! video/x-raw,format=BGRA,framerate=30/1 ! queue ! videoconvert ! x264enc bitrate=2500 tune=zerolatency pass=5 quantizer=22 speed-preset=superfast key-int-max=60 ref=2 ! mux. audiotestsrc ! audio/x-raw ! audiorate ! queue ! audioconvert ! voaacenc bitrate=128000 ! flvmux streamable=true name=mux ! rtmpsink location="rtmp://<a href="http://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w">live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w</a>" What can be my problem? Thank you in advance for your return. BR Thierry<o:p></o:p></div></div></div></div></div></body></html>