- file send/receive commands now supports webRTC transfer. In `send` command, the
`--webrtc` flags is currenty used to activate it.
- WebRTC related code have been factorized and moved to `libervia.frontends.tools.webrtc*`
modules.
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- the `merge_pip` option is now used to indicate if local feedback and remote video
streams must be merged with local feedback being a PiP of remote video. By default, it's
done for `SINKS_AUTO`, but it can be manually specified to use it with `SINKS_APP` or to
split ``SINKS_AUTO`` in 2 windows.
- target size of the compositor used with `merge_pip` can be specified. By default, 720p
is used.
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- Freedesktop Desktop Screenshare port is now used when Wayland is detected (needs
`xdg-desktop-portal` with the implementation corresponding to desktop environment).
- Add a binding feature to feedback state to application (e.g. if desktop sharing is
cancelled from desktop environment, or at portal's permission request level).
- fix misnaming of video source (was wrongly named `camera` instead of `video`).
- fix desktop sharing pad selection in `input-selector` when it has been added once, then
removed, then added again.
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this is a factored implementation usable by all non-web frontends. Sources and Sinks can
be configured easily to use tests source or local webcam/microphone, autosinks or a
`appsink` that the frontend will use.
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- `run_from_thread` can be used to run a method from a thread.
- `maybe_async` can be used to run a method if we are not sure if it's async or not.
- `install_glib_asyncio_iteration` run the GLib loop from asyncio one's.
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