README: Extend gstreamer examples

There have been many reports of facing difficulties with the gstreamer
element and getting the libcamerasrc to successfully negotiate with
other gstreamer elements.

This is often due to the current limitations on colorimetry and frame
rate support in the element, and can usually be worked around by
specifying those explicitly in the caps.

Provide a tested example to capture, encode, and stream images as jpeg
to a remote device in the gstreamer section of the getting started
readme.

Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
1 file changed