Jakub Adam authored Sep 03, 2019 and David King committed Sep 21, 2020

gst_caps_simplify() doesn't preserve the original order of caps, so when
called on the full set of caps, collected from all supported_formats, it
may end up preferring image/jpeg caps even when video/x-raw with
identical resolution and framerate is available.

Simplify the caps coming from each of supported_formats separately, so
that video/x-raw always comes first in the result GstCaps.

We prefer raw camera output whenever possible in order to avoid decoding
MJPEG.