aac encoded audio has noise in .mp4 file

[Hayk Avetisyan]

Hi experts,

I obtained .mp4 video with aac audio codec. There is an audio noise if play
the video with *vlc *player. You can just run this pipeline to reproduce
the case:

*gst-launch-1.0 uridecodebin
uri=https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm
<https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm>
name=demux mp4mux name=mux ! filesink location=sintel_trailer_gst.mp4
 demux. ! queue ! x264enc ! mux. demux. ! queue ! audioconvert ! avenc_aac
! mux.*

gstreamer-version: *1.18.4.1*

Could you please give an advise for this case.

Thank you very much in advance
Hayk Avetisyan
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