AUDIO GSTREAMER PIPELINE

[Rand Graham]

Hello,

What kind of audio are you trying to transcode to AAC?

I have had to transcode audio before and what I had to do was parse it, decode then audioconvert it.

So something like this (appropriate for what kind of audio input you have).

d.audio ! aacparse ! avdec_aac !  audioconvert ! voaacenc bitrate=128000 ! flvmux streamable=true name=mux ! rtmpsink location="rtmp://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w<http://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w>"

Regards,
Rand

From: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] On Behalf Of Thierry Gayet
Sent: Tuesday, October 29, 2019 12:45 PM
To: gstreamer-devel at lists.freedesktop.org
Subject: AUDIO GSTREAMER PIPELINE

Hi guys,

I use the module GStreamer gstcefsrc (https://github.com/centricular/gstcefsrc) 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="https://soundcloud.com/platform/sama" ! 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://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w<http://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w>"

It does not work!

If I test with another audio test source it works:

gst-launch-1.0 cefsrc url="https://soundcloud.com/platform/sama" ! 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://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w<http://live-cdg.twitch.tv/app/live_452136974_6g1fEZ7RxsMwVE6ADeOiVLuegDAm9w>"

What can be my problem?

Thank you in advance for your return.

BR

Thierry
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