How to use VA-API in gstreamer?

[horai]

Actually, I am trying to use vaapih264dec as well. It works good this way,
but I experience problem trying to integrate it.
http://gstreamer-devel.966125.n4.nabble.com/VAAPI-clutter-td4685837.html

On the other hand, assuming avdec_h264 is a gstreamer library, wrapper,
whatever to libav library
https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-libav-plugins/html/gst-libav-plugins-plugin-libav.html
or codecs. And according to this:
https://wiki.libav.org/Hardware/vaapi
Could it be possible that when using avdec_h264, could avdec_h264 be in
theory also accelerated via VAAPI? 
I have very low CPU usage when using avdec_h264 on latest Debian.



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