GitLab

        webrtcbin
            .connect("on-new-transceiver", false, |values| {
                values[1]
                    .get::<gst::glib::Object>()
                    .unwrap()
                    .unwrap()
                    .set_property(
                        "codec_preferences",
                        &gst::Caps::new_simple("application/x-rtp", &[("encoding-name", &"H264")]),
                    )
                    .unwrap();
    
                None
            })
            .unwrap();

This panics (because no codec_preferences property, which I do not understand either to be honest), but besides that also segfaults the whole app, which is not expected:

thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: BoolError { message: "property not found", filename: "/rust/.cargo/registry/src/github.com-1ecc6299db9ec823/glib-0.9.3/src/object.rs", function: "glib::object", line: 1373 }', ...:530:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fatal runtime error: failed to initiate panic, error 5
Aborted (core dumped)

Wasn't able to reproduce with gstwebrtc-demo, because latest revisions work differently and do not seem to fire on-new-transceiver event.

I'm not sure if this is an issue with bindings specifically or not.

P.S. Would be nice to set codec_preferences though if someone knows how :)