gstreamer1: update to 1.18.3.

[travankor]

No description provided.

[mobinmob]

#27994
Seems we had the same idea :P

[travankor]

:p

this one uses @ndowens prior work

[travankor]

@ahesford gst-omx for rpi is broken for arm

From the earlier thread the advice is to drop rpi and use generic universally.

Does the rpi option have any advantages over the generic?

[ahesford]

I know nothing about gst-omx and only touched it to preserve its current behavior while employing a consistent build option. If the generic version works and the rpi option is broken across the board, just drop the build option entirely. Otherwise, maybe just remove it from the defaults.

[travankor]

Dropped the option since it is indeed broken across the board.

[ericonr]

Please squash the gst-omx commits.

[pullmoll]

Should we update to 1.16.3 because of CVE-2021-3185 or wait for this one?

[travankor]

@pullmoll good question.

[pullmoll]

How old is 1.18.3? Does it have the fix for gst-plugins-ugly1?
It may not be affected at all. I have no further information regarding this.

[travankor]

Yeah, it's fixed in this PR