[Bug 774223] opencv: move base opencv filter class and utilities to gst-libs

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774223

--- Comment #12 from Philippe Renon <philippe_renon at yahoo.fr> ---
Some notes:

1/ The opencv plugin and gst-libs library will be compiled only if opencv is
detected.

2/ The opencv plugin not only depends on opencv but also on opencv_contrib
while the gst-libs/opencv depends only on opencv.

On a related note please, take a look at
https://bugzilla.gnome.org/show_bug.cgi?id=772822

The opencv plugin will fail to compile if opencv is detected but opencv_contrib
is not present. The opencv_contrib is built along opencv, so some opencv
distributions have it and others not (cf.
https://github.com/opencv/opencv_contrib/blob/master/README.md).

3/ Concerning meson, this patch does not make the situation worse as the opencv
plugin was not yet ported to it.

4/ Last, and less relevant, there are issues in gstopencvutils.
One of them is that it does not support "sparse" video formats well. Some
opencv elements declare "BGRx" as supported it does not work well.
Related to that I opened https://bugzilla.gnome.org/show_bug.cgi?id=773433 for
which I will show a use case on top of this patch.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.