xvgetvideo(3) [x11r4 man page]

XvGetVideo(3)						     Library Functions Manual						     XvGetVideo(3)

Name
       XvGetVideo - capture video from a drawable

Syntax
       #include <X11/extensions/Xvlib.h>

       XvGetVideo(Display *dpy, XvPortID port, Drawable d, GC gc,
		  int vx, int vy, unsigned int vw, unsigned int vh,
		  int dx, int dy, unsigned int dw, unsigned int dh);

Arguments
       dpy	      Specifies the connection to the X server.

       port	      Defines the port to which video output is sent.

       d	      Defines the drawable (window) from which video output is to be obtained.

       gc	      Defines the graphical context.  GC components are: subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.

       vx,vy,vw,vh    Define  the  location and size of the video region is to be written.  vx and vy define the x and y coordinates of the upper-
		      left corner of the video region; vw and vh define the width and height, in pixels, of the video region.

       dx,dy,dw,dh    Define the location of the source drawable from which the video image is to be taken.  dx and dy define the x and y  coordi-
		      nates  of  the  upper-left  corner of the drawable region; dw and dh define the width and height, in pixels, of the drawable
		      region.

Description
       outputs video from a drawable.  The position and size of the destination rectangle is specified by vx, vy, vw, and vh.	The  position  and
       size of the source rectangle is specified by dx, dy, dw, and dh.

       Drawable  data  is  clipped  to	the  bounds of the drawable, scaled to the requested video region size (or the closest size supported) and
       clipped to the bounds of the video encoding.  The contents of any region not updated with drawable data is undefined.

       If video is successfully initiated, an XvVideoNotify event with detail XvStarted is generated for the drawable.	If the port is already	in
       use, its video is preempted, and if the new drawable is different than the old, an XvVideoNotify event with detail XvPreempted is generated
       for the old drawable.  If the port is grabbed by another client, this request is ignored, and an XvVideoNotify event with detail XvBusy	is
       generated for the drawable.

Returned Values
       [Success]
	       Returned if XvGetVideo(3) completed successfully.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvGetVideo(3) failed to allocate memory to process the request.

Diagnostics
       [XvBadPort]
	       Generated if the requested port does not exist.

       [BadGC] Generated if the requested graphics context does not exist.

       [BadDrawable]
	       Generated if the requested drawable does not exist.

       [BadAlloc]
	       Generated if there were insufficient resources to process the request.

See Also
       XvGetStill(3), XvPutVideo(3), XvVideoNotify(3)

X Version 11							    libXv 1.0.4 						     XvGetVideo(3)