gstreamer-rs/examples/src/bin/launch_glib_main.rs

extern crate gstreamer as gst;
use gst::prelude::*;

extern crate glib;

use std::env;

fn main() {
    let pipeline_str = env::args().collect::<Vec<String>>()[1..].join(" ");

    gst::init().unwrap();

    let main_loop = glib::MainLoop::new(None, false);

    let pipeline = gst::parse_launch(&pipeline_str).unwrap();
    let bus = pipeline.get_bus().unwrap();

    let ret = pipeline.set_state(gst::State::Playing);
    assert_ne!(ret, gst::StateChangeReturn::Failure);

    let main_loop_clone = main_loop.clone();

    //bus.add_signal_watch();
    //bus.connect_message(move |_, msg| {
    bus.add_watch(move |_, msg| {
        use gst::MessageView;

        let main_loop = &main_loop_clone;
        match msg.view() {
            MessageView::Eos(..) => main_loop.quit(),
            MessageView::Error(err) => {
                println!(
                    "Error from {}: {} ({:?})",
                    msg.get_src().get_path_string(),
                    err.get_error(),
                    err.get_debug()
                );
                main_loop.quit();
            }
            _ => (),
        };

        glib::Continue(true)
    });

    main_loop.run();

    let ret = pipeline.set_state(gst::State::Null);
    assert_ne!(ret, gst::StateChangeReturn::Failure);
}