Question

我正在谷歌搜索，以便在我的c ++程序（媒体播放器）中使用gstreamer库。我查看了这些链接： 1，2，3。此时我可以打开媒体文件并在绘图区域内播放。无论如何，当我再次想要播放另一个媒体时，它会在另一个新窗口中打开。

我为此疯狂，因为参考文献非常不完整，我在谷歌上发现了一些东西。

这是我的“playMedia”功能：

void MediaPlayer::playMedia(const string &filename) {

    gst_element_set_state(playerData.playbin2, GST_STATE_READY);
    gchar *uri = g_filename_to_uri(filename.c_str(),NULL,NULL);
    if (uri) {
        g_object_set(playerData.playbin2, "uri", uri, NULL);
        g_object_set(G_OBJECT(playerData.videosink), "force-aspect-ratio", TRUE, NULL);
        g_free(uri);
        gtk_widget_realize(areaPlayer); ì
        play();
    } 
}

这就是“播放”功能：

void MediaPlayer::play() {

    state = PLAYING;
    gtk_button_set_image(GTK_BUTTON(buttonPlayPause), imgPause);
    g_object_ref(imgPause);

    gst_element_set_state(playerData.playbin2, GST_STATE_PLAYING);

}

附加

以下是我定义areaPlayer（gtk_drawing_area）的代码部分：

gst_init(0, 0);
playerData.playbin2 = gst_element_factory_make("playbin2", NULL);
playerData.videosink = gst_element_factory_make ("xvimagesink", NULL);
g_object_set(G_OBJECT(playerData.playbin2), "video-sink", playerData.videosink, NULL);

playerData.duration = GST_CLOCK_TIME_NONE;

areaPlayer = gtk_drawing_area_new();
gtk_widget_set_double_buffered (areaPlayer, FALSE);
gtk_box_pack_start(GTK_BOX(theWidget), areaPlayer, true, true, 0);
g_signal_connect(areaPlayer, "realize", G_CALLBACK(this->playerRealize), this); 
g_signal_connect(areaPlayer, "draw", G_CALLBACK(this->playerDraw), this);

这是实现功能

void MediaPlayer::playerRealize(GtkWidget *widget, gpointer data) { 

    MediaPlayer *m = (MediaPlayer *)data;

    GdkWindow *window = gtk_widget_get_window(widget);
    guintptr window_handle;

    if (!gdk_window_ensure_native(window))
        cout << "Couldn't create native window needed for GstXOverlay!" << endl;

    // Retrieve window handler from GDK
    window_handle = GDK_WINDOW_XID(window);

    // Pass it to playbin2, which implements XOverlay and will forward it to the video sink

    gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (m->playerData.videosink), window_handle);

}

使用gstreamer的媒体播放器 - 播放第二个媒体时的错误行为

0 个答案: