Qt 稳定流程播放rtsp视频流的代码

以下是使用 Qt 实现播放 RTSP 视频流的代码示例，包括设置视频窗口、连接 RTSP 服务器、获取视频流、解码并显示视频等基本步骤：

#include <QtGui>
#include <QtWidgets>
#include <QtNetwork>
#include <QMediaPlayer>
#include <QVideoWidget>

class RTSPPlayer : public QWidget
{
    Q_OBJECT
public:
    explicit RTSPPlayer(QWidget *parent = nullptr);

private:
    QMediaPlayer *m_player;
    QVideoWidget *m_videoWidget;
    QNetworkAccessManager *m_networkManager;
    QNetworkReply *m_reply;
    QByteArray m_data;

private slots:
    void onMetaDataChanged();
    void onVideoAvailable();
    void onReadyRead();
    void onFinished();
    void onError(QNetworkReply::NetworkError error);

};

RTSPPlayer::RTSPPlayer(QWidget *parent) : QWidget(parent)
{
    m_player = new QMediaPlayer(this);
    m_videoWidget = new QVideoWidget(this);
    m_player->setVideoOutput(m_videoWidget);
    m_networkManager = new QNetworkAccessManager(this);

    QVBoxLayout *layout = new QVBoxLayout;
    layout->addWidget(m_videoWidget);
    setLayout(layout);
}

void RTSPPlayer::onMetaDataChanged()
{
    qDebug() << "MetaDataChanged:" << m_player->metaData();
}

void RTSPPlayer::onVideoAvailable()
{
    qDebug() << "VideoAvailable:" << m_player->isVideoAvailable();
}

void RTSPPlayer::onReadyRead()
{
    m_data.append(m_reply->readAll());
}

void RTSPPlayer::onFinished()
{
    m_player->setMedia(QMediaContent(), nullptr);
    m_player->setMedia(QMediaContent(), m_networkManager->cache()->data(QUrl("http://localhost")));
    m_reply->deleteLater();
    m_reply = nullptr;
}

void RTSPPlayer::onError(QNetworkReply::NetworkError error)
{
    qDebug() << "Error:" << error;
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    RTSPPlayer w;
    w.show();

    QUrl url("rtsp://example.com:554/stream");

    QNetworkRequest request(url);
    request.setRawHeader("User-Agent", "MyPlayer/1.0");

    QNetworkReply *reply = w.m_networkManager->get(request);
    QObject::connect(reply, &QNetworkReply::metaDataChanged, &w, &RTSPPlayer::onMetaDataChanged);
    QObject::connect(reply, &QNetworkReply::readyRead, &w, &RTSPPlayer::onReadyRead);
    QObject::connect(reply, &QNetworkReply::finished, &w, &RTSPPlayer::onFinished);
    QObject::connect(reply, static_cast<void(QNetworkReply::*)(QNetworkReply::NetworkError)>(&QNetworkReply::error), &w, &RTSPPlayer::onError);

    w.m_reply = reply;
    w.m_player->play();
    return a.exec();
}

#include "main.moc"

需要注意的是，该示例代码仅供参考，实际应用中可能需要根据具体的需求进行修改和调整。同时，由于 RTSP 视频流的格式和编码方式可能不同，可能需要使用不同的库或工具进行解码和播放。