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CentOS 7.0 - man page for xvgetvideo (centos section 3)

XvGetVideo(3)				 libXv Functions			    XvGetVideo(3)

NAME
       XvGetVideo - capture video from a drawable

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

       int 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  xand  y	coordinates of the upper-left corner of the video
		      region; vwand 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.  dxand dy define the xand y coordinates of the upper-left  corner
		      of the drawable region; dwand 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 speci-
       fied 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 encod-
       ing.  The contents of any region not updated with drawable data is undefined.

       If video is successfully initiated, an XvVideoNotify event with detail XvStarted is gener-
       ated  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.

RETURN 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 1.0.9				    XvGetVideo(3)


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