gstreamer-video-source.cpp

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// Copyright (C) 2024 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QtMultimediaWidgets/qtmultimediawidgetsglobal.h>

#include <QtMultimedia/qaudiooutput.h>

#include <QtMultimedia/qgstreamervideosource.h>

#include <QtWidgets/qapplication.h>

#include <QtCore/qcommandlineparser.h>

using namespace std::chrono_literals;

using namespace Qt::Literals;

int main(int argc, char **argv)

    qputenv("QT_MEDIA_BACKEND", "gstreamer");

    QApplication app(argc, argv);

    QCommandLineParser parser;

    parser.setApplicationDescription("GStreamer Video Source");

    parser.addHelpOption();

    parser.addVersionOption();

    parser.addPositionalArgument(

            "pipeline", "Pipeline string, e.g. `videotestsrc pattern=smpte-rp-219 is-live=true`");

    parser.process(app);

    QByteArray pipelineString;

    if (parser.positionalArguments().isEmpty()) {

        // pipelineString = "videotestsrc pattern=smpte-rp-219 is-live=true";

        pipelineString = "videotestsrc is-live=true ! gamma gamma=2.0";

    } else {

        pipelineString = parser.positionalArguments()[0].toLatin1();

    QVideoWidget wid;

    QMediaCaptureSession session;

    session.setVideoSink(wid.videoSink());

    auto *source = new QGStreamerVideoSource(pipelineString, &session);

    session.setNativeVideoSource(source);

    source->start();

    wid.show();

    return QApplication::exec();