如何使用GStreamer和XOverlay在GTK +应用程序窗口中嵌入video？
我正在尝试使用GTK +和GStreamer编写一个小型媒体播放器，目前使用XOverlay接口将video嵌入主窗口的GtkDrawing区域。
该程序是使用以下命令编译的：
g++ /home/phongcao/cacao.cc -o /home/phongcao/cacao `pkg-config --cflags --libs gtk+-2.0 gstreamer-0.10 gstreamer-plugins-base-0.10 gstreamer-interfaces-0.10` 问题是video显示在SEPARATED窗口中（而不是在主窗口的工具栏下）：
这是该程序的源代码：
#include #include #include #include GstElement *play; GtkAdjustment *progress; GtkWidget *mainwindow, *drawingarea; class TopWin { public: TopWin(); ~TopWin(); int Initialize(int argc, char *argv[]); int Execute(); static void FileChooser(GtkButton *button, GtkWindow *mainwindow); static int Play(gchar *addr); static gboolean print_position(GstElement *element); private: }; TopWin::TopWin() { } TopWin::~TopWin() { } gboolean TopWin::print_position(GstElement *play) { GstFormat fmt = GST_FORMAT_TIME; gint64 pos, len; if (gst_element_query_position(play, &fmt, &pos) && gst_element_query_duration(play, &fmt, &len)) { g_print("Time: %" GST_TIME_FORMAT " / %" GST_TIME_FORMAT "\r", GST_TIME_ARGS(pos), GST_TIME_ARGS(len)); gtk_adjustment_set_value(GTK_ADJUSTMENT(progress), (pos*100)/len); } return TRUE; } int TopWin::Play(gchar *addr) { GMainLoop *loop; GstBus *bus; loop = g_main_loop_new(NULL, FALSE); play = gst_element_factory_make("playbin", "play"); g_object_set(G_OBJECT(play), "uri", addr, NULL); bus = gst_pipeline_get_bus(GST_PIPELINE(play)); gst_object_unref(bus); GstElement* x_overlay = gst_element_factory_make("xvimagesink", "videosink"); g_object_set(G_OBJECT(play), "video-sink", x_overlay, NULL); gst_x_overlay_set_window_handle(GST_X_OVERLAY(x_overlay), GDK_WINDOW_XID(drawingarea->window)); gst_element_set_state(play, GST_STATE_NULL); g_timeout_add(1000, (GSourceFunc) print_position, play); gtk_adjustment_set_value(GTK_ADJUSTMENT(progress), 0); gst_element_set_state(play, GST_STATE_PLAYING); g_main_loop_run(loop); gst_element_set_state(play, GST_STATE_NULL); gst_object_unref(GST_OBJECT(play)); gtk_widget_show_all(mainwindow); gtk_widget_realize(drawingarea); return 0; } void TopWin::FileChooser(GtkButton *button, GtkWindow *mainwindow) { GtkWidget *filechooser; gchar *uri; filechooser = gtk_file_chooser_dialog_new("Open File...", mainwindow, GTK_FILE_CHOOSER_ACTION_OPEN, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, GTK_STOCK_OK, GTK_RESPONSE_OK, NULL); gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(filechooser), FALSE); gint response = gtk_dialog_run(GTK_DIALOG(filechooser)); if (response == GTK_RESPONSE_OK) { uri = gtk_file_chooser_get_uri(GTK_FILE_CHOOSER(filechooser)); gtk_widget_destroy(filechooser); Play(uri); g_free(uri); } else if (response == GTK_RESPONSE_CANCEL) { gtk_widget_destroy(filechooser); } } int TopWin::Initialize(int argc, char *argv[]) { GtkWidget *playbutton, *openbutton, *volumebutton; GtkWidget *prefbutton, *notebook; GtkWidget *vbox, *hbox; GtkWidget *entry, *hscale; gtk_init(&argc, &argv); gst_init(&argc, &argv); mainwindow = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_container_set_border_width(GTK_CONTAINER(mainwindow), 0); g_signal_connect(G_OBJECT(mainwindow), "destroy", G_CALLBACK(gtk_main_quit), NULL); playbutton = gtk_button_new(); gtk_button_set_image(GTK_BUTTON(playbutton), gtk_image_new_from_stock(GTK_STOCK_MEDIA_PLAY, GTK_ICON_SIZE_SMALL_TOOLBAR)); openbutton = gtk_button_new(); gtk_button_set_image(GTK_BUTTON(openbutton), gtk_image_new_from_stock(GTK_STOCK_OPEN, GTK_ICON_SIZE_SMALL_TOOLBAR)); g_signal_connect(G_OBJECT(openbutton), "clicked", G_CALLBACK(TopWin::FileChooser), (gpointer) mainwindow); volumebutton = gtk_button_new(); gtk_button_set_image(GTK_BUTTON(volumebutton), gtk_image_new_from_file("volume.png")); prefbutton = gtk_button_new(); gtk_button_set_image(GTK_BUTTON(prefbutton), gtk_image_new_from_stock(GTK_STOCK_EXECUTE, GTK_ICON_SIZE_SMALL_TOOLBAR)); entry = gtk_entry_new(); progress = GTK_ADJUSTMENT(gtk_adjustment_new(0.00, 0.00, 100.00, 1.00, 0.00, 0.00)); hscale = gtk_hscale_new(progress); gtk_scale_set_draw_value(GTK_SCALE(hscale), FALSE); gtk_widget_set_size_request(hscale, 200, NULL); hbox = gtk_hbox_new(FALSE, 0); drawingarea = gtk_drawing_area_new(); vbox = gtk_vbox_new(FALSE, 0); gtk_box_pack_start(GTK_BOX(hbox), openbutton, FALSE, FALSE, 2); gtk_box_pack_start(GTK_BOX(hbox), playbutton, FALSE, FALSE, 2); gtk_box_pack_start(GTK_BOX(hbox), hscale, FALSE, FALSE, 2); gtk_box_pack_start(GTK_BOX(hbox), volumebutton, FALSE, FALSE, 2); gtk_box_pack_start(GTK_BOX(hbox), entry, TRUE, TRUE, 2); gtk_box_pack_start(GTK_BOX(hbox), prefbutton, FALSE, FALSE, 2); gtk_button_set_relief(GTK_BUTTON(playbutton), GTK_RELIEF_NONE); gtk_button_set_relief(GTK_BUTTON(openbutton), GTK_RELIEF_NONE); gtk_button_set_relief(GTK_BUTTON(volumebutton), GTK_RELIEF_NONE); gtk_button_set_relief(GTK_BUTTON(prefbutton), GTK_RELIEF_NONE); gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0); gtk_box_pack_start(GTK_BOX(vbox), drawingarea, FALSE, FALSE, 0); gtk_container_add(GTK_CONTAINER(mainwindow), vbox); gtk_widget_show_all(mainwindow); gtk_widget_realize(drawingarea); return 0; } int TopWin::Execute() { gtk_main(); return 0; } int main(int argc, char *argv[]) { int result = 0; TopWin* topwin = new TopWin(); if (0 == topwin->Initialize(argc, argv)) { result = topwin->Execute(); } delete topwin; return result; }
谢谢你帮我解决这个问题！ 为此，我花了将近3天的时间抓挠我的脑袋。 GStreamer网站上的XOverlay参考令人困惑…… 🙁
如果您需要任何其他信息，请告诉我……谢谢！
你需要做这样的事情：
GstElement* x_overlay=gst_element_factory_make ("xvimagesink", "videosink"); g_object_set(G_OBJECT(play),"video-sink",x_overlay,NULL); gst_x_overlay_set_window_handle(GST_X_OVERLAY(x_overlay), GDK_WINDOW_XID(drawingarea->window));
创建新的XVvideo接收器。 将其设置为播放箱的video接收器。 将xvvideo接收器附加到您的drawingarea窗口ID。 在此之前，您还需要将drawingarea添加到某个容器中。
您的程序会产生警告和gtk错误，它们可能是您的一些问题的根源，可以更好地修复它们。
gst_x_overlay_set_window_handle接口现在在最近的gstreamer库中已弃用。 新界面是gst_video_overlay_set_window_handle。 可以从http://wikistack.com/how-to-make-your-own-media-player-in-linux-using-gtk-and-gstreamer/进行简单的补充。