Hi,
I have implemented a function to start camera streaming on my mipi-dsi display as below function:
void StartStreaming(void)
{
GMainLoop *loop;
GstElement *filter, *csp, *sink;
GstPad *pad;
/* init GStreamer */
gst_init (NULL, NULL);
loop = g_main_loop_new (NULL, FALSE);
/* build */
pipeline = gst_pipeline_new ("my-pipeline");
src = gst_element_factory_make ("imxv4l2videosrc", "src");
if (src == NULL)
qDebug() << "Could not create 'videotestsrc' element";
filter = gst_element_factory_make ("capsfilter", "filter");
g_assert (filter != NULL);
text = gst_element_factory_make ("textoverlay", NULL);
if (!text) qDebug() << "need textoverlay from gst-plugins-base";
g_object_set (text,"text", "GStreamer rocks!","font-desc", "Sans, 30", "halignment", /* position */ 4,"valignment", /* position */ 3,NULL);
csp = gst_element_factory_make ("videoconvert", "csp");
if (csp == NULL) qDebug() << "Could not create 'videoconvert' element";
sink = gst_element_factory_make ("imxeglvivsink", "sink");
if (sink == NULL) {
qDebug() << "Getting error in video sink";
sink = gst_element_factory_make ("imxeglvivsink", "sink");
if (sink == NULL){
qDebug() << "Could not create neither 'xvimagesink' nor 'ximagesink' element";
}
}
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, NULL);
gst_object_unref (bus);
gst_bin_add_many (GST_BIN (pipeline), text, src, filter, csp, sink, NULL);
gst_element_link_many (src, text, filter, csp, sink, NULL);
GstStateChangeReturn sret = gst_element_get_state (pipeline, NULL, NULL, -1);
qDebug() << "Get pipe state " + QString::number(sret);
QWidget *CamWidget = new QWidget();
xwinid=CamWidget->winId();
gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY(sink), guintptr(xwinid));
/* run */
sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
qDebug() << "set pipe line for playing succesfully " + QString::number(sret);
/* wait until it's up and running or failed */
sret = gst_element_get_state (pipeline, NULL, NULL, -1);
if(sret != GST_STATE_CHANGE_FAILURE)
{
qDebug() << "pipe state for Playing: " + QString::number(sret);
}
else
{
qDebug() << "set pipe line for playing failed " + QString::number(sret);
}
}
I have issue : my application is getting crash when i started application first time on power reset.
Application crash when " gst_element_set_state (pipeline, GST_STATE_PLAYING);" function called.
I am getting following error on debug console:
Alignment trap: not handling instruction f4024aef at [<67d992b0>]
Unhandled fault: alignment exception (0x811) at 0x67e59e78
pgd = a940c000
[67e59e78] *pgd=397a0831, *pte=2e16775f, *ppte=2e167c7f
It would be great anyone can help to sort this issue.
My system detail:
Process : imx6dualite
Linux kernel : 4.9.88-10182-gec7d7d8-dirty
qt revision : 5.7.1
GStreamer: 1.10.4
Thanks,
Jignesh Patel
