gstreamer 1.2.1

Closes #24226.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gst-plugins-base 1.2.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gst-plugins-good 1.2.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gst-plugins-ugly 1.2.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gst-plugins-bad 1.2.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gst-libav 1.2.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>