Have you tried
gst-inspect-1.0
It list all elements
You can do e.g.
gst-inspect-1.0 | grep av
to list all elements which contain av.
On which platform/environment are you doing your tests? Which gstreamer version?
Von: gstreamer-devel [mailto:[hidden email]]
Im Auftrag von Shubham Shrivastava
Gesendet: Freitag, 8. Juni 2018 14:38
An: [hidden email]
Betreff: gstreamer1.0-libav is not available
Package gstreamer1.0-libav is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'gstreamer1.0-libav' has no installation candidate
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