Otherwise it will complain when trying to trim screencasts produced by GNOME Shell:
(video-trimmer:3229521): GStreamer-Play-WARNING **: 22:37:13.327: GstPlay: scaletempo element not available. Audio pitch will not be preserved during trick modes
(video-trimmer:3229521): VideoTrimmer-WARNING **: 22:37:13.357: src/video_preview.rs:142: Error in MediaFile: Error from element /GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: Your GStreamer installation is missing a plug-in.
Your GStreamer installation is missing a plug-in.
../gst/playback/gsturidecodebin.c(1027): no_more_pads_full (): /GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0:
no suitable plugins found:
../gst/playback/gstdecodebin2.c(4701): gst_decode_bin_expose (): /GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0:
no suitable plugins found:
Missing decoder: WebM (video/webm)
- Don't use appstream-glib and remove patch for `metainfo.xml.in.in` as
it's not really required.
- Use an upstreamed patch that makes gtk3, python3 & glib not required,
along with patching shebang of `post-install.py`.
- Remove `updateScript` as it's not suitable for non-gnome applications.
- Move gobject-introspection to `nativeBuildInputs`.
