How to show the GStreamer video in Qt frameless window ? - visual-studio-2010

Question

I am trying to show the gstreamer video in qt frameless window .
My gstreamer pipeline for which i am creating code is : gst-launch-1.0 -v rtspsrc location=rtsp://192.168.1.15:8554/test ! rtpjitterbuffer ! rtph264depay ! avdec_h264 ! d3dvideosink sync=false
This is my first question please answer me. My code is as below
My code is working for a qt window. It is showing the video which it is receiving
from rtsp link but i have two major issues in it:
1. When i minimize this window, It loses it's output video and starts to show a blank screen. 2. I want to open this video in a frameless window but if i do so then it displays nothing.
I am using Qt-4.8.12 and gstreamer version 1.4.5 for windows 7 64 bit. Any help regarding these two issues is highly appreciated. Thanks in Advance.
#include <glib.h>
#include <gst/gst.h>
#include <gst/video/videooverlay.h>
#include <QApplication>
#include <QTimer>
#include <QWidget>
#include <stdio.h>
#include "qmainwindow.h"
static void on_pad_added (GstElement *element, GstPad *pad, gpointer data);
static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data);
int main(int argc, char *argv[])
{
if (!g_thread_supported ())
g_thread_init (NULL);
/* Initialize GStreamer */
gst_init (&argc, &argv);
QApplication app(argc, argv);
app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit ()));
/* Creating Elements */
//GstElement *pipeLine = gst_pipeline_new ("xvoverlay");
QWidget window;
// QMainWindow window;
window.resize(1024,768);
WId xwinid=window.winId();
GMainLoop *loop;
GstElement *pipeLine, *rtspSrc, *rtpJitterBuffer, *rtpH264Depay, *avDecH264, *videoSink;
rtspSrc = gst_element_factory_make("rtspsrc", NULL);
rtpJitterBuffer = gst_element_factory_make("rtpjitterbuffer", NULL);
rtpH264Depay = gst_element_factory_make("rtph264depay", NULL);
avDecH264 = gst_element_factory_make("avdec_h264", NULL);
videoSink = gst_element_factory_make("d3dvideosink", NULL);
loop = g_main_loop_new (NULL, FALSE);
if (!rtspSrc || !rtpJitterBuffer || !rtpH264Depay || !avDecH264 || !videoSink)
{
g_printerr ("Not all elements could be created.\n");
return -1;
}
/* Set element properties */
g_object_set( rtspSrc, "location", "rtsp://192.168.1.16:8554/test" , NULL);
g_object_set( videoSink, "sync", false, NULL);
/*Initializing Pipeline*/
pipeLine = gst_pipeline_new ("TestPipeLine");
if (!pipeLine)
{
g_printerr ("Pipeline could not be created.");
}
/* we add a message handler */
GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeLine));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);
/*Adding Components to the pipeline */
gst_bin_add_many (GST_BIN(pipeLine),
rtspSrc,
rtpJitterBuffer,
rtpH264Depay,
avDecH264,
videoSink,
NULL);
/* if (gst_element_link (rtspSrc, rtpJitterBuffer) != TRUE)
{
g_printerr ("rtspSrc & rtpJitterBuffer could not be linked.\n");
gst_object_unref (pipeLine);
return -1;
}
*/
if (gst_element_link (rtpJitterBuffer, rtpH264Depay) != TRUE)
{
g_printerr ("rtpJitterBuffer and rtpH264Depay could not be linked.\n");
gst_object_unref (pipeLine);
return -1;
}
if (gst_element_link (rtpH264Depay, avDecH264) != TRUE)
{
g_printerr ("rtpH264Depay and avDecH264 could not be linked.\n");
gst_object_unref (pipeLine);
return -1;
}
if (gst_element_link (avDecH264, videoSink) != TRUE)
{
g_printerr ("avDecH264 and videoSink could not be linked.\n");
gst_object_unref (pipeLine);
return -1;
}
g_signal_connect (rtspSrc, "pad-added", G_CALLBACK (on_pad_added), rtpJitterBuffer);
window.setWindowFlags(Qt::FramelessWindowHint);
// else
// g_printerr("Pipeline created");zz
gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY(videoSink), guintptr(xwinid));
window.show();
/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeLine, GST_STATE_PLAYING);
app.exec();
/* Iterate */
g_print ("Running...\n");
g_main_loop_run (loop);
/* Out of the main loop, clean up nicely */
g_print ("Returned, stopping playback\n");
gst_element_set_state (pipeLine, GST_STATE_NULL);
g_print ("Deleting pipeline\n");
gst_object_unref (GST_OBJECT (pipeLine));
return 0;
}
static void on_pad_added (GstElement *element, GstPad *pad, gpointer data)
{
GstPad *sinkpad;
GstElement *decoder = (GstElement *) data;
/* We can now link this pad with the vorbis-decoder sink pad */
g_print ("Dynamic pad created, linking demuxer/decoder\n");
sinkpad = gst_element_get_static_pad (decoder, "sink");
gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
}
static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data)
{
GMainLoop *loop = (GMainLoop *) data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_EOS:
g_print ("End of stream\n");
g_main_loop_quit (loop);
break;
case GST_MESSAGE_ERROR: {
gchar *debug;
GError *error;
gst_message_parse_error (msg, &error, &debug);
g_free (debug);
g_printerr ("Error: %s\n", error->message);
g_error_free (error);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}

Answer 1

If you switch back to using QWindow, this will work:
window.setWindowFlags (Qt::FramelessWindowHint);
I'm not sure how, but I think something similar is available for QWidget.