MarsSeed [1] filed a deletion request for gstreamer0.10-ugly [2]: No longer used by any package. Abandoned since 2022, no newer comments since then. Popularity 0.
gstreamer0.10 has been failing to build since mid-2024. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gstreamer0.10-ugly/
