:
set -x
gst-launch-1.0 --gst-debug=2 filesrc location="$1" ! queue ! decodebin ! tee name=t \
    t. ! audioconvert ! audioresample ! audio/x-raw,rate=48000 ! queue ! opusenc ! opusparse ! queue ! webmmux name=m m. ! filesink location="$2" \
    t. ! audioconvert ! audio/x-raw ! queue ! spacescope style=1 shader=0 ! videoconvert ! videoscale ! videorate ! video/x-raw,width=512,height=512,framerate=60/1 ! vp9enc ! queue ! m.