GStreamer, Qt4, QDevelop and C++

[midiangr]

Thanks a lot for your advice!

I finally used QTable-because i need to show there elements that come from a database with multiple fiellds- and it seems to work well.

About Phonon, I have read about, but I'd rather use just plain gstreamer-that's the specs.

I will try to use your advice about singleton class.

[midiangr]

Going on with the applications, I have the following problem:

I am trying to make pipelines, so as to record and playback video with sound.
How exactly can I find the "properties needed to pass to the pipeline to make it work(eg the sound source etc)

I was given a sample code to do this, I have tried to make changes and adapt it to my machine, but nothing...Any ideas? Is there any way to find all these options somewhere?

This is the code for creating three pipelines:

const char* PLAYBACK =
	"filesrc location=foo.avi !"
	"avidemux name=demx ! ffdec_mpeg2video ! queue !"
	"xvimagesink name=x11w demx. ! queue ! ffdec_mp3 ! alsasink";
 
const char* RECORD = "alsasrc device=plughw:1,0 ! tee name=sndsrc !"
	"queue name=sndqueue max-size-buffers=100 ! audiorate !"
	" audio/x-raw-int,width=8,rate=16000 ! audioconvert ! ffenc_mp2 ! "
	"mx. v4lsrc typefind=true ! tee name=vidsrc ! queue name=vidqueue !"
	" videorate ! video/x-raw-yuv,framerate=25/1,width=640,height=480 !"
	" ffenc_mpeg2video ! avimux name=mx ! filesink location=foo.avi sndsrc. "
	"! queue ! alsasink vidsrc.! queue ! xvimagesink name=x11w";
 
const char* VIEW = "alsasrc device=plughw:1,0 ! "
	"queue name=sndqueue max-size-buffers=100 ! audiorate !"
	" audio/x-raw-int,width=8,rate=16000 ! alsasink  v4lsrc typefind=true"
	" ! queue name=vidqueue ! videorate !"
	" video/x-raw-yuv,framerate=25/1,width=640,height=480 ! "
	"queue ! xvimagesink name=x11w";
 
//code 
//code 
//code
 
void GstFrame::create_pipeline()
{
	if(pipeline) destroy_pipeline();
 
	GError *err=0;
	pipeline = gst_parse_launch(pipmode,&err);
 
	if (err != NULL) {
	    /* Report error to user, and free error */
	    cerr << "Unable to create pipeline: " << err->message << endl;
	    return;
    } else {
    	assert(pipeline!=0);
    }
	xvimagesink = gst_bin_get_by_name(GST_BIN(pipeline), "x11w");
	gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(xvimagesink), gstframe->winId());
 
	bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
	bus_poll_timer->start(50);
 
	pipeline_state = GST_STATE_NULL;
	set_eos(false);
}

const char* PLAYBACK =
	"filesrc location=foo.avi !"
	"avidemux name=demx ! ffdec_mpeg2video ! queue !"
	"xvimagesink name=x11w demx. ! queue ! ffdec_mp3 ! alsasink";

const char* RECORD = "alsasrc device=plughw:1,0 ! tee name=sndsrc !"
	"queue name=sndqueue max-size-buffers=100 ! audiorate !"
	" audio/x-raw-int,width=8,rate=16000 ! audioconvert ! ffenc_mp2 ! "
	"mx. v4lsrc typefind=true ! tee name=vidsrc ! queue name=vidqueue !"
	" videorate ! video/x-raw-yuv,framerate=25/1,width=640,height=480 !"
	" ffenc_mpeg2video ! avimux name=mx ! filesink location=foo.avi sndsrc. "
	"! queue ! alsasink vidsrc.! queue ! xvimagesink name=x11w";

const char* VIEW = "alsasrc device=plughw:1,0 ! "
	"queue name=sndqueue max-size-buffers=100 ! audiorate !"
	" audio/x-raw-int,width=8,rate=16000 ! alsasink  v4lsrc typefind=true"
	" ! queue name=vidqueue ! videorate !"
	" video/x-raw-yuv,framerate=25/1,width=640,height=480 ! "
	"queue ! xvimagesink name=x11w";

//code 
//code 
//code

void GstFrame::create_pipeline()
{
	if(pipeline) destroy_pipeline();

	GError *err=0;
	pipeline = gst_parse_launch(pipmode,&err);

	if (err != NULL) {
	    /* Report error to user, and free error */
	    cerr << "Unable to create pipeline: " << err->message << endl;
	    return;
    } else {
    	assert(pipeline!=0);
    }
	xvimagesink = gst_bin_get_by_name(GST_BIN(pipeline), "x11w");
	gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(xvimagesink), gstframe->winId());

	bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
	bus_poll_timer->start(50);

	pipeline_state = GST_STATE_NULL;
	set_eos(false);
}

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When I come to run this code, i get pipeline=0, and assert fails.
no element alsasrc found


sorry if the post is misplaced, or it is a trivial question, but I have never programmed that stuff before...
thanks!

[midiangr]

Another question please, thanks in advance!

How can I get an entire row from a TableWidget, by just clicking on it?

When I click on a row, I need the data inside to be returned so as to pick what I want...

[wysota]

How can I get an entire row from a TableWidget, by just clicking on it?

When I click on a row, I need the data inside to be returned so as to pick what I want...

What did you already try?