Gstreamer: OPUS to AAC while RTP to HLS

user_5235622 0
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I am trying to record RTP stream with video and audio to HLS. Using GStreamer and nodejs. I get WARNING: erroneous pipeline: no element "fdkaacenc". I am using macOS with M1 CPU and all plugins base, good, bad, and ugly are installed.

The whole command I am trying to execute is this

GST_DEBUG=3 gst-launch-1.0 -v -e 
rtpbin name=rtpbin latency=50 buffer-mode=0 sdes="application/x-rtp-source-sdes, cname=(string)3xtbiiMIcbTDI1Td" !
udpsrc port=40228 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,payload=(int)105,encoding-name=(string)H264,ssrc=(uint)982701080" 
! rtpbin.recv_rtp_sink_0 rtpbin. ! queue ! rtpvp8depay ! vp8dec ! x264enc ! mux. 
udpsrc port=40401 caps="application/x-rtp,media=(string)audio,clock-rate=(int)48000,payload=(int)100,encoding-name=(string)OPUS,ssrc=(uint)906623489" ! 

# the part I am trying to convert opus to aac
rtpbin.recv_rtp_sink_1 rtpbin. ! queue ! rtpopusdepay ! opusdec ! fdkaacenc ! mux. 

mpegtsmux name=mux ! hlssink location=storage/recordings/take-3540_question-1996/webcam-029ad85b-7a43-45a5-888f-f5ce873b108f%06d.ts playlist-location=storage/recordings/take-3540_question-1996/webcam-029ad85b-7a43-45a5-888f-f5ce873b108f.m3u8 target-duration=4 
udpsrc address=127.0.0.1 port=40463 ! rtpbin.recv_rtcp_sink_0 rtpbin.send_rtcp_src_0 ! udpsink host=127.0.0.1 port=23257 bind-address=127.0.0.1 bind-port=40463 sync=false async=false udpsrc address=127.0.0.1 port=40499 ! rtpbin.recv_rtcp_sink_1 rtpbin.send_rtcp_src_1 ! udpsink host=127.0.0.1 port=42134 bind-address=127.0.0.1 bind-port=40499 sync=false async=false

any ideas?

node.js gstreamer
1 Answers

I fixed that by avenc_aac instead of fdkaacenc. Not to mention that you should use audioconvert before avenc_aac.

The part of command I was trying to convert to aac:

rtpopusdepay ! opusdec ! audioconvert ! avenc_aac.

More: avenc_aac is part of gstreamer ffmpeg plugins which exists in linux, mac and windows. fdkaacenc is part of gstreamer bad plugins that may not be the same in all systems. That's is why using avenc_aac is more approperiate. So it can be executed in both mac and linux.

user_52356220
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