mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-05-03 00:48:47 +00:00
71 lines
2.2 KiB
Rust
71 lines
2.2 KiB
Rust
use anyhow::Error;
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use gst::prelude::*;
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#[path = "../tutorials-common.rs"]
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mod tutorials_common;
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fn tutorial_main() -> Result<(), Error> {
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// Initialize GStreamer
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gst::init()?;
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// Build the pipeline
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let pipeline = gst::parse_launch(
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"playbin uri=https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm")?;
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// Create elements that go inside the sink bin
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let equalizer = gst::ElementFactory::make("equalizer-3bands")
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.name("equalizer")
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.build()
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.expect("Could not create equalizer element.");
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let convert = gst::ElementFactory::make("audioconvert")
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.name("convert")
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.build()
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.expect("Could not create audioconvert element.");
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let sink = gst::ElementFactory::make("autoaudiosink")
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.name("audio_sink")
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.build()
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.expect("Could not create autoaudiosink element.");
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// Create the sink bin, add the elements and link them
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let bin = gst::Bin::builder().name("audio_sink_bin").build();
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bin.add_many(&[&equalizer, &convert, &sink]).unwrap();
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gst::Element::link_many(&[&equalizer, &convert, &sink]).expect("Failed to link elements.");
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let pad = equalizer
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.static_pad("sink")
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.expect("Failed to get a static pad from equalizer.");
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let ghost_pad = gst::GhostPad::with_target(Some("sink"), &pad).unwrap();
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ghost_pad.set_active(true)?;
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bin.add_pad(&ghost_pad)?;
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// Configure the equalizer
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equalizer.set_property("band1", -24.0);
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equalizer.set_property("band2", -24.0);
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pipeline.set_property("audio-sink", &bin);
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// Set to PLAYING
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pipeline.set_state(gst::State::Playing)?;
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// Wait until an EOS or error message appears
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let bus = pipeline.bus().unwrap();
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let _msg = bus.timed_pop_filtered(
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gst::ClockTime::NONE,
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&[gst::MessageType::Error, gst::MessageType::Eos],
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);
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// Clean up
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pipeline.set_state(gst::State::Null)?;
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Ok(())
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}
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fn main() {
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// tutorials_common::run is only required to set up the application environment on macOS
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// (but not necessary in normal Cocoa applications where this is set up automatically)
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match tutorials_common::run(tutorial_main) {
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Ok(_) => {}
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Err(err) => eprintln!("Failed: {err}"),
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};
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}
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