When trying to render one video after the other in a circular queue, I’m getting significant memory leaks for some reason.

What would be the best way to make a simple repeating video carousel GUI without causing any leak in memory? Removing references doesn’t seem to do much either, I just hope it isn’t caused within Gstreamer itself.

I tried g_object_unref when wanting to delete the widgets from the main window, without success. The memory just keeps piling on.

Edit: Here’s a very minimal program to demonstrate the issue. This switches between two video files every 5 seconds, but still somehow uses up all of my available memory.

static gboolean switch_video(gpointer user_data)
{
    static bool toggle = false;
    GtkVideo *video = GTK_VIDEO(user_data);

    std::string path = toggle ? "files/video1.mp4" : "files/video2.mp4";
    GtkMediaStream *new_media_file = gtk_media_file_new_for_filename(path.c_str());

    gtk_video_set_media_stream(video, GTK_MEDIA_STREAM(new_media_file));
    gtk_media_stream_play(new_media_file);
    g_object_unref(new_media_file);

    toggle = !toggle;
    return TRUE;
}

static void activate(GtkApplication *app, gpointer user_data)
{
    GtkWidget *window = gtk_application_window_new(app);

    gtk_window_set_title(GTK_WINDOW(window), "GTK4 Video Player");
    gtk_window_set_default_size(GTK_WINDOW(window), 800, 600);

    GtkWidget *video = gtk_video_new();
    gtk_window_set_child(GTK_WINDOW(window), video);
    gtk_widget_show(window);

    g_timeout_add_seconds(5, switch_video, video);
}

int main(int argc, char *argv[])
{
    GtkApplication *app = gtk_application_new("org.gtk.example", G_APPLICATION_FLAGS_NONE);
    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
    int status = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);

    return status;
}