gstreamer missing elements when built for NWJS

[Zuzon]

When addon is used with pure nodejs, all works totally fine, but when it is compiled for nwjs, then i'm receiving errors of missing gstreamer elements, like avdec_h264. GstError: no element "avdec_h264"
It looks like under nwjs environment gstreamer-superficial is not using a gst, which is already installed on system, but it tries to use another kind.

Later i have added ffmpeg to my nwjs and received different error:
Crashing due to FD ownership violation

nwjs 0.69.1
ubuntu 22

[dfischer23]

I have no idea about the "FD ownership violation", but for the first issue, have you tried setting/checking GST_PLUGINS_PATH for your nwjs environment?

[Zuzon]

Yes, GST_PLUGIN_PATH and GST_PLUGIN_SYSTEM_PATH tried. it is being ignored. Also tried to pass wrong plugin path in terminal. with terminal works as expected. but with nwjs looks like it is being ignored

[Zuzon]

As i understood, this native model is automatically linking with ffmpeg which is coming with nwjs, not system one.
I have enabled gstreamer debug messages and seen all paths are correct, but then initialization fails. any idea how to link gstreamer with system installed ffmpeg?