no element “voaacenc”

[klanjabrik]

I try to execute
gst-launch-1.0 -em rtpbin name=rtpbin latency=5 udpsrc port=5102
caps="application/x-rtp,media=(string)audio,clock-rate=(int)48000,encoding-name=(string)OPUS"
! rtpbin.recv_rtp_sink_0 rtpbin. ! queue ! rtpopusdepay ! opusdec !
audioconvert ! audioresample ! voaacenc ! mux. udpsrc port=5104
caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264"
! rtpbin.recv_rtp_sink_1 rtpbin. ! queue ! rtph264depay ! h264parse ! mux.
flvmux name=mux streamable=true ! rtmpsink sync=false
location="rtmp://127.0.0.1:1935/show/stream live=1"

Unfortunately it raise an error: WARNING: erroneous pipeline: no element
"voaacenc".

i've installed:
=====
gstreamer1-plugins-bad-free.x86_64
gstreamer1-plugins-bad-free-devel.x86_64
gstreamer1-plugins-bad-freeworld.x86_64 




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