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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtMultimedia/qmediametadata.h>
#include <QtMultimedia/qmediaplayer.h>
#include <QtCore/qcommandlineparser.h>
#include <QtCore/qcoreapplication.h>
#include <cstdio>
#include <optional>
using namespace std::chrono_literals;
using namespace Qt::Literals;
struct CLIArgs
{
QString media;
};
std::optional<CLIArgs> parseArgs(QCoreApplication &app)
{
QCommandLineParser parser;
parser.setApplicationDescription("Read metadata from media");
parser.addHelpOption();
parser.addVersionOption();
parser.addPositionalArgument("media", "File to open");
parser.process(app);
if (parser.positionalArguments().isEmpty()) {
qInfo() << "Please specify a media file";
return std::nullopt;
}
return CLIArgs{
parser.positionalArguments().front(),
};
}
auto asString = [](const auto &arg) {
QString str;
QDebug dbg(&str);
dbg << arg;
return str;
};
void printMetadata(QTextStream &stream, const QMediaMetaData &metadata)
{
for (auto entry : metadata.asKeyValueRange())
stream << " " << asString(entry.first) << ": " << asString(entry.second) << "\n";
stream << "\n";
}
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
std::optional<CLIArgs> args = parseArgs(app);
if (!args)
return 1;
QMediaPlayer player;
QObject::connect(&player, &QMediaPlayer::errorOccurred, &app, [&] {
QTextStream out(stdout);
out << "Error occurred: " << player.errorString();
QCoreApplication::exit(1);
});
QObject::connect(&player, &QMediaPlayer::metaDataChanged, &app, [&] {
QTextStream out(stdout);
out << "Metadata:\n";
printMetadata(out, player.metaData());
out << "\n\n";
});
QObject::connect(&player, &QMediaPlayer::tracksChanged, &app, [&] {
QTextStream out(stdout);
auto listOfVideoTracks = player.videoTracks();
out << "Video tracks:\n";
for (const QMediaMetaData &metadata : listOfVideoTracks) {
out << " Track no " << listOfVideoTracks.indexOf(metadata) << ":\n";
printMetadata(out, metadata);
}
out << "\n\n";
auto listOfAudioTracks = player.audioTracks();
out << "Audio tracks:\n";
for (const QMediaMetaData &metadata : listOfAudioTracks) {
out << " Track no " << listOfAudioTracks.indexOf(metadata) << ":\n";
printMetadata(out, metadata);
}
out << "\n\n";
auto listOfSubtitleTracks = player.subtitleTracks();
out << "Subtitle tracks:\n";
for (const QMediaMetaData &metadata : listOfSubtitleTracks) {
out << " Track no " << listOfSubtitleTracks.indexOf(metadata) << ":\n";
printMetadata(out, metadata);
}
out << "\n\n";
QCoreApplication::exit(0);
});
player.setSource(args->media);
return app.exec();
}