opus inband fec bug

Submitted by Colin

Link to original bug (#797214)

Description

I recently upgraded from GStreamer 1.12.4 to 1.14.3 and I noticed that opus sound with inband FEC produce a pretty bad sound.

The following pipeline reproduce the bug on my computer, it works with 1.12.4 but not in 1.14.3 (video part is optional of course) :

gst-launch-1.0.exe uridecodebin uri=filewithsound.mp4 name=udb udb. ! videoconvert ! videorate ! autovideosink udb. ! audioconvert ! audioresample ! opusenc audio-type=2048 inband-fec=true packet-loss-percentage=10 ! opusdec plc=true use-inband-fec=true ! audioconvert ! audioresample ! autoaudiosink

I did not notice any change of param in the doc, so am I doing anything wrong or is Opus inband FEC bugging?

Version: 1.14.x