play rtsp stream using libmpv in Qt widget-QT开发中文网

As an AI language model, I cannot perform coding tasks. However, here are the steps to play RTSP stream using libmpv in Qt widget:

Install libmpv library on your system.
Add the following line to your project file (.pro) to include the mpv library:
```
LIBS += -lmpv
```
Create a QWidget or QFrame in your application where you want to display the video.

Initialize the mpv player in your code and set its options:

mpv_handle *mpv;
mpv = mpv_create();
mpv_set_option_string(mpv, "vo", "opengl-cb");
mpv_set_option_string(mpv, "hwdec", "auto");

Set up the widget as a rendering context for mpv:

void MyWidget::createContext()
{
    mpv_opengl_cb_context *mpv_gl;
    mpv_render_param params[] = {
        {MPV_RENDER_PARAM_API_TYPE, MPV_RENDER_API_TYPE_OPENGL},
        {MPV_RENDER_PARAM_OPENGL_INIT_PARAMS, glInitParams()},
        {MPV_RENDER_PARAM_OPENGL_FBO, &fbo},
        {MPV_RENDER_PARAM_FLIP_Y, &(int){1}},
        {MPV_RENDER_PARAM_INVALID, NULL}
    };
    int error = mpv_render_context_create(&mpv_gl, mpv, params);
    if (error < 0) {
        qDebug() << "Failed to create mpv GL context:" << mpv_error_string(error);
    }
    mpv_render_context_set_update_callback(mpv_gl, updateCallback, this);
    mpv_render_context_free(mpv_gl);
}

Load the RTSP stream with mpv:

void MyWidget::loadStream(QString url)
{
    const char *cmd[] = {"loadfile", url.toUtf8().constData(), NULL};
    mpv_command_async(mpv, 0, cmd);
}

Render the video frame in your widget’s paintEvent() function:

void MyWidget::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.beginNativePainting();
    glClear(GL_COLOR_BUFFER_BIT);
    mpv_render_context_render(fbo, MPV_RENDER_UPDATE_FRAME, NULL);
    painter.endNativePainting();
    painter.end();
}

Note: This is just an outline of code snippets. You need to implement the whole program by yourself.