https://gstreamer.freedesktop.org/src/gst-plugins-good/gst-plugins-good-1.18.1.tar.xz good https://gstreamer.freedesktop.org/src/gst-plugins-bad/gst-plugins-bad-1.18.1.tar.xz bad https://gstreamer.freedesktop.org/src/gst-plugins-ugly/gst-plugins-ugly-1.18.1.tar.xz ugly https://gstreamer.freedesktop.org/src/gst-libav/gst-libav-1.18.1.tar.xz libav