videotestsrc_to_screen.rs

//
// Copyright (c) Dell Inc., or its subsidiaries. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//

use gst::prelude::*;

fn main() {
    // Initialize GStreamer
    gst::init().unwrap();

    // This creates a pipeline by parsing the gst-launch pipeline syntax.
    let pipeline = gst::parse_launch(
        "videotestsrc name=src ! video/x-raw,width=160,height=120,framerate=30/1 \
        ! videoconvert ! clockoverlay font-desc=\"Sans, 48\" time-format=\"%F %T\" ! autovideosink",
    )
    .unwrap();

    // Start playing
    pipeline
        .set_state(gst::State::Playing)
        .expect("Unable to set the pipeline to the `Playing` state");

    // Wait until error or EOS
    let bus = pipeline.bus().unwrap();
    for msg in bus.iter_timed(gst::CLOCK_TIME_NONE) {
        use gst::MessageView;

        match msg.view() {
            MessageView::Eos(..) => break,
            MessageView::Error(err) => {
                println!(
                    "Error from {:?}: {} ({:?})",
                    err.src().map(|s| s.path_string()),
                    err.error(),
                    err.debug()
                );
                break;
            }
            _ => (),
        }
    }

    // Shutdown pipeline
    pipeline
        .set_state(gst::State::Null)
        .expect("Unable to set the pipeline to the `Null` state");
}