Fixed...
The problem is that the GStreamer pipeline don't free properly when the
window's exit button was pressed: it can be fixed using a quit function
that frees the pipeline prior to close the GTK main loop.
GstElement *pipeline; // global now
// prototype
void destroy (GtkWidget *, gpointer);
{
void
destroy (GtkWidget *widget, gpointer data) {
gst_element_set_state(pipeline, GST_STATE_NULL);
gst_object_unref(pipeline);
gtk_main_quit();
}
// adding action to window's events
gtk_signal_connect(GTK_OBJECT(window),
"delete_event",
GTK_SIGNAL_FUNC(destroy), // previous: gtk_main_quit
NULL);
Quoting [EMAIL PROTECTED]:
> Hi everybody. I wrote a little application combining GTK and GStreamer
> functions to view the camera input on the window's screen and
> to take photo (not yet implemented, this is experimental code...).
> When I launch the application I obtain the following error:
>
> "The program 'test2' received an X Window System error.
> This probably reflects a bug in the program.
> The error was 'BadDrawable (invalid Pixmap or Window parameter)'.
> (Details: serial 1362 error_code 9 request_code 140 minor_code 9)"
>
> Sometimes BadDrawable is substituted with BadWindow or others... I really
> don't know why this occur: the application runs properly, I also manage
> the "delete" and "destroy" event on the main window, but... Can anyone
> help me?
>
> Here is the launching command line to compile:
>
> gcc base.c `pkg-config --cflags --libs gtk+-2.0 gstreamer-0.10 \
> gstreamer-interfaces-0.8 gdk-2.0` -o test2
>
>
> And here is the source code:
>
> #include <gtk/gtk.h>
> #include <gst/gst.h>
> #include <gst/interfaces/xoverlay.h>
> #include <gdk/gdkx.h>
> #include <gdk/gdk.h>
>
> static gboolean expose( GtkWidget * widget, GdkEventExpose * event,
> gpointer data );
>
> int main( int argc, char *argv[] )
> {
> GtkWidget *window, *screen;
>
> GstElement *pipeline, *src, *sink, *csp;
> GstElement *tee, *csp2, *fakesink;
> GstElement *queue;
> GstCaps *filter;
> gboolean link_ok;
>
>
>
> gtk_init (&argc, &argv);
>
> gst_init(&argc, &argv);
>
>
> window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>
> gtk_signal_connect(GTK_OBJECT(window),
> "delete_event",
> GTK_SIGNAL_FUNC(gtk_main_quit),
> NULL);
>
> gtk_signal_connect(GTK_OBJECT(window),
> "destroy",
> GTK_SIGNAL_FUNC(gtk_main_quit),
> NULL);
>
> screen = gtk_drawing_area_new();
>
> gtk_window_set_title(GTK_WINDOW(window), "Camera app");
> gtk_container_set_border_width (GTK_CONTAINER (window), 5);
> gtk_widget_set_size_request(window, 640, 480);
>
> gtk_widget_set_size_request(screen, 320, 240);
> gtk_widget_show(screen);
>
>
> gtk_container_add(GTK_CONTAINER(window), screen);
>
>
> pipeline = gst_pipeline_new("camera");
> src = gst_element_factory_make("videotestsrc", "src");
> // src = gst_element_factory_make("gconfv4l2src", "src");
>
> sink = gst_element_factory_make("xvimagesink", "sink");
> csp = gst_element_factory_make("ffmpegcolorspace", "csp");
> tee = gst_element_factory_make("tee", "tee");
> fakesink = gst_element_factory_make("fakesink", "fakesink");
> csp2 = gst_element_factory_make("ffmpegcolorspace", "csp2");
> queue = gst_element_factory_make("queue", "queue");
>
>
> gst_bin_add(GST_BIN(pipeline), src);
> gst_bin_add(GST_BIN(pipeline), csp);
> gst_bin_add(GST_BIN(pipeline), tee);
> gst_bin_add(GST_BIN(pipeline), csp2);
> gst_bin_add(GST_BIN(pipeline), sink);
> gst_bin_add(GST_BIN(pipeline), queue);
> gst_bin_add(GST_BIN(pipeline), fakesink);
>
>
> filter = gst_caps_new_simple("video/x-raw-yuv",
> "width", G_TYPE_INT, 320,
> "height", G_TYPE_INT, 240,
> "framerate", GST_TYPE_FRACTION, 11, 1,
> NULL);
>
>
> link_ok = gst_element_link_filtered(src, tee, filter);
> if (!link_ok)
> g_warning("Failed to link elements\n");
> gst_element_link(tee, csp);
> gst_element_link(csp, sink);
> gst_element_link(tee, queue);
> gst_element_link(queue, csp2);
> gst_element_link(csp2, fakesink);
>
> /* now connect the video source to the desired widget */
> g_signal_connect(screen, "expose-event", G_CALLBACK(expose), sink);
>
>
> /* set current pipeline state to PLAY */
> gst_element_set_state(pipeline, GST_STATE_PLAYING);
>
>
> gtk_widget_show(window);
>
> /* entering main loop */
> gtk_main ();
>
> /* stop the pipeline */
> gst_element_set_state(pipeline, GST_STATE_NULL);
> /* frees the pipeline */
> gst_object_unref(pipeline);
>
> return 0;
> }
>
>
> static gboolean expose
> ( GtkWidget * widget, GdkEventExpose * event, gpointer data )
> {
>
> gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(data),
> GDK_WINDOW_XWINDOW(widget->window));
> return FALSE;
> }
>
>
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>
>
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