Created attachment 378578 [details, diff] efl-gstreamer1.patch Per the summary, media-plugins/evas_generic_loaders are seperate plugins and do not affect use of gstreamer1 by dev-libs/efl.
The gstreamer support in evas_generic_loaders does depend on the gstreamer support in efl and if you use different gstreamer versions for both, you wont be able to use gstreamer support in evas_generic_loaders, so, as the comment said, no gstreamer1 support in efl until evas_generic_loaders has it too.
Er, no. Mixed gstreamer works perfectly fine here. The evas_generic_loader readme specifically states they're stand-alone executables run from a generic loader module. They are not dependant on efls own use of gstreamer at all!
Should this bug really be resolved as invalid? As Alan Swanson said in comment #2, mixed gstreamer should work perfectly fine.
