OpenCV - Revision history

Polto: /* Using v4lsink GStreamer plugin and v4l2loopback */

2010-08-29T15:31:42Z

Using v4lsink GStreamer plugin and v4l2loopback

@@ Line 58: / Line 58: @@
 This is basically an AVLD fork that now evolved into v4l2loopback and a special gstreamer sink to the loopback device.
-http://code.google.com/p/v4lsink/ & http://code.google.com/p/v4l2loopback/
+You can find the projects homepages at: http://code.google.com/p/v4lsink/ & http://code.google.com/p/v4l2loopback/ (This version does not compile due to vala dependencies, somebody cloned and patched the project, it is available from github: http://github.com/umlaeute/gst-v4l2loopback)
 ==Using OpenCV with FFMPEG==

Maurosc3ner: /* Using AVLD */

2010-07-30T02:55:02Z

Using AVLD

← Older revision		Revision as of 02:55, 30 July 2010
Line 10:		Line 10:
	While it is the only solution with proprietary v4l compatible software products (such as skype), it's a total waste of resources for a free software app what can be adapted to receive an RTP stream.		While it is the only solution with proprietary v4l compatible software products (such as skype), it's a total waste of resources for a free software app what can be adapted to receive an RTP stream.

	Moreover, you can ~~downloa~~ from:		Moreover, you can proceed to download the source code from:
	http://allonlinux.free.fr/Projets/AVLD/src/avld_0.1.4.tar.bz2		http://allonlinux.free.fr/Projets/AVLD/src/avld_0.1.4.tar.bz2

Line 52:		Line 52:
	return 0;		return 0;
	}		}

			--[[User:maurosc3ner\|Esteban Correa]] 21:54, 29 July 2010 (CDT)

	==Using v4lsink GStreamer plugin and v4l2loopback==		==Using v4lsink GStreamer plugin and v4l2loopback==

Maurosc3ner: /* Using AVLD */

2010-07-29T22:08:12Z

Using AVLD

← Older revision		Revision as of 22:08, 29 July 2010
Line 33:		Line 33:
	int main(int argc,char *argv[])		int main(int argc,char *argv[])
	{		{
			cvNamedWindow( "Current Frame");
	IplImage* pCurrentFrame = NULL;		IplImage* pCurrentFrame = NULL;
	CvSize frame_size;		CvSize frame_size;

Maurosc3ner: /* Using AVLD */

2010-07-29T21:59:36Z

Using AVLD

← Older revision		Revision as of 21:59, 29 July 2010
Line 42:		Line 42:
	pCurrentFrame = cvQueryFrame ( capture );		pCurrentFrame = cvQueryFrame ( capture );
	//video input file finished		//video input file finished
	if( !pCurrentFrame ) break;		if( !pCurrentFrame ) break;
	cvShowImage( "Current Frame", pCurrentFrame );		cvShowImage( "Current Frame", pCurrentFrame );
	c = cvWaitKey(10);		c = cvWaitKey(10);

Maurosc3ner: /* Using AVLD */

2010-07-29T21:59:10Z

Using AVLD

← Older revision		Revision as of 21:59, 29 July 2010
Line 41:		Line 41:
	//Request frame from Camera		//Request frame from Camera
	pCurrentFrame = cvQueryFrame ( capture );		pCurrentFrame = cvQueryFrame ( capture );
	//video input file finished		//video input file finished
	if( !pCurrentFrame ) break;		if( !pCurrentFrame ) break;
	cvShowImage( "Current Frame", pCurrentFrame );		cvShowImage( "Current Frame", pCurrentFrame );

Maurosc3ner: /* Using AVLD */

2010-07-29T21:58:41Z

Using AVLD

← Older revision		Revision as of 21:58, 29 July 2010
Line 40:		Line 40:
	{		{
	//Request frame from Camera		//Request frame from Camera
	pCurrentFrame = cvQueryFrame ( capture );		pCurrentFrame = cvQueryFrame ( capture );
	//video input file finished		//video input file finished
	if( !pCurrentFrame ) break;		if( !pCurrentFrame ) break;

Maurosc3ner: /* Using AVLD */

2010-07-29T21:58:15Z

Using AVLD

← Older revision		Revision as of 21:58, 29 July 2010
Line 43:		Line 43:
	//video input file finished		//video input file finished
	if( !pCurrentFrame ) break;		if( !pCurrentFrame ) break;


	cvShowImage( "Current Frame", pCurrentFrame );		cvShowImage( "Current Frame", pCurrentFrame );
	c = cvWaitKey(10);		c = cvWaitKey(10);

Maurosc3ner: /* Using AVLD */

2010-07-29T21:57:43Z

Using AVLD

← Older revision		Revision as of 21:57, 29 July 2010
Line 9:		Line 9:

	While it is the only solution with proprietary v4l compatible software products (such as skype), it's a total waste of resources for a free software app what can be adapted to receive an RTP stream.		While it is the only solution with proprietary v4l compatible software products (such as skype), it's a total waste of resources for a free software app what can be adapted to receive an RTP stream.

			Moreover, you can downloa from:
			http://allonlinux.free.fr/Projets/AVLD/src/avld_0.1.4.tar.bz2

			Then:
			$ tar -jxvf avld_0.1.4.tar.bz2
			$ cd avld_0.1.4
			$ make && sudo make install

			Right now you can mount your dummy device typing:
			$sudo modprobe avld width=<camera width resolution> height=<camera height resolution> fps=<camera fps>

			Finally, you need to use mencoder in order to redirect the rtsp source to the dummy device:
			$ sudo mencoder rtsp://192.168.1.180 -nosound -ovc raw -vf format=bgr24 -of rawvideo -o /dev/video0

			With this, you just need a simple code in order to preview the scene:

			#include "highgui.h"
			#include "cv.h"
			#include "cvaux.h"
			#include <ml.h>

			int main(int argc,char *argv[])
			{
			IplImage* pCurrentFrame = NULL;
			CvSize frame_size;
			CvCapture* capture = cvCaptureFromCAM ( 0 ); //the dummy device make the job :)
			char c;
			while ( 1 )
			{
			//Request frame from Camera
			pCurrentFrame = cvQueryFrame ( capture );
			//video input file finished
			if( !pCurrentFrame ) break;


			cvShowImage( "Current Frame", pCurrentFrame );
			c = cvWaitKey(10);
			if ( c == 27 ) break;
			}
			cvReleaseImage ( &pCurrentFrame );
			cvDestroyAllWindows ();
			return 0;
			}

	==Using v4lsink GStreamer plugin and v4l2loopback==		==Using v4lsink GStreamer plugin and v4l2loopback==

Polto at 23:26, 28 July 2010

2010-07-28T23:26:13Z

← Older revision		Revision as of 23:26, 28 July 2010
Line 9:		Line 9:

	While it is the only solution with proprietary v4l compatible software products (such as skype), it's a total waste of resources for a free software app what can be adapted to receive an RTP stream.		While it is the only solution with proprietary v4l compatible software products (such as skype), it's a total waste of resources for a free software app what can be adapted to receive an RTP stream.

			==Using v4lsink GStreamer plugin and v4l2loopback==
			This is basically an AVLD fork that now evolved into v4l2loopback and a special gstreamer sink to the loopback device.

			http://code.google.com/p/v4lsink/ & http://code.google.com/p/v4l2loopback/

	==Using OpenCV with FFMPEG==		==Using OpenCV with FFMPEG==

Polto at 11:02, 27 July 2010

2010-07-27T11:02:36Z

← Older revision		Revision as of 11:02, 27 July 2010
Line 15:		Line 15:
	==Using OpenCV with GStreamer==		==Using OpenCV with GStreamer==

			==Design your OpenCV code as GStreamer plugin==
			http://github.com/Elleo/gst-opencv

	=Portability=		=Portability=