XvGetVideo(3) libXv Functions XvGetVideo(3)
XvGetVideo - capture video from a drawable
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);
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
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.
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.
Returned if XvGetVideo(3) completed successfully.
Returned if the Xv extension is unavailable.
Returned if XvGetVideo(3) failed to allocate memory to process the request.
Generated if the requested port does not exist.
[BadGC] Generated if the requested graphics context does not exist.
Generated if the requested drawable does not exist.
Generated if there were insufficient resources to process the request.
XvGetStill(3), XvPutVideo(3), XvVideoNotify(3)
X Version 11 libXv 1.0.9 XvGetVideo(3)