The bbappends in  https://github.com/renesas-rcar/meta-renesas/tree/dunfell-dev/meta-rcar-gen3/recipes-multimedia/gstreamer

look for *1.16.2.bbappend

will fail with 3.1.4 as YP upstream moved on to 1.16.3 .

The build will fail complaining about the dangling bbappends.

Quick solution:

BBMASK += "meta-renesas/meta-rcar-gen3/recipes-multimedia/gstreamer/gstreamer1.0-.*1.16.2\.bbappend"

and

own versions of the files with relaxed versioning in the filename:

  – meta-agl-bsp/meta-rcar-gen3/recipes-multimedia/gstreamer/gstreamer1.0-omx_1.16.%.bbappend
  – meta-agl-bsp/meta-rcar-gen3/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_1.16.%.bbappend
 -- meta-agl-bsp/meta-rcar-gen3/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.16.%.bbappend

Follow-up required to fix the root cause.