A new upstream update with the following highlights:

• Development in GitLab was switched to a single git repository containing all the modules
• GstPlay: new high-level playback library, replaces GstPlayer
• WebM Alpha decoding support
• Encoding profiles can now be tweaked with additional application-specified element properties
• Compositor: multi-threaded video conversion and mixing
• RTP header extensions: unified support in RTP depayloader and payloader base classes
• SMPTE 2022-1 2-D Forward Error Correction support
• Smart encoding (pass through) support for VP8, VP9, H.265 in encodebin and transcodebin
• Runtime compatibility support for libsoup2 and libsoup3 (libsoup3 support experimental)
• Video decoder subframe support
• Video decoder automatic packet-loss, data corruption, and keyframe request handling for RTP / WebRTC / RTSP
• mp4 and Matroska muxers now support profile/level/resolution changes for H.264/H.265 input streams (i.e. codec data changing on the fly)
• mp4 muxing mode that initially creates a fragmented mp4 which is converted to a regular mp4 on EOS
• Audio support for the WebKit Port for Embedded (WPE) web page source element
• CUDA based video color space convert and rescale elements and upload/download elements
• NVIDIA memory:NVMM support for OpenGL glupload and gldownload elements
• Many WebRTC improvements
• The new VA-API plugin implementation fleshed out with more decoders and new postproc elements
• AppSink API to retrieve events in addition to buffers and buffer lists
• AppSrc gained more configuration options for the internal queue (leakiness, limits in buffers and time, getters to read current levels)
• Updated Rust bindings and many new Rust plugins
• Improved support for custom minimal GStreamer builds
• Support build against FFmpeg 5.0
• Linux Stateless CODEC support gained MPEG-2 and VP9
• Windows Direct3D11/DXVA decoder gained AV1 and MPEG-2 support
• Lots of new plugins, features, performance improvements and bug fixes

Fix numeric conversion, correct Pitivi crash.