A GNOME media player built using GJS and powered by GStreamer with OpenGL rendering. Can also be used as a pre-made widget for Gtk apps.
WORK IN PROGRESS
Clapper uses these GStreamer elements:
GStreamer
Other required plugins (codecs) depend on video format.
To use VAAPI make sure you have gstreamer1-vaapi installed. Verify with:
VAAPI
gstreamer1-vaapi
gst-inspect-1.0 vaapi
On some older GPUs you might need to export GST_VAAPI_ALL_DRIVERS=1 environment variable.
GST_VAAPI_ALL_DRIVERS=1