1XvGetVideo(3) libXv Functions XvGetVideo(3)
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6 XvGetVideo - capture video from a drawable
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9 #include <X11/extensions/Xvlib.h>
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11 int XvGetVideo(Display *dpy, XvPortID port, Drawable d, GC gc,
12 int vx, int vy, unsigned int vw, unsigned int vh,
13 int dx, int dy, unsigned int dw, unsigned int dh);
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16 dpy Specifies the connection to the X server.
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18 port Defines the port to which video output is sent.
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20 d Defines the drawable (window) from which video output is
21 to be obtained.
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23 gc Defines the graphical context. GC components are: sub‐
24 window-mode, clip-x-origin, clip-y-origin, and clip-
25 mask.
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27 vx,vy,vw,vh Define the location and size of the video region is to
28 be written. vx and vy define the xand y coordinates of
29 the upper-left corner of the video region; vwand vh
30 define the width and height, in pixels, of the video
31 region.
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33 dx,dy,dw,dh Define the location of the source drawable from which
34 the video image is to be taken. dxand dy define the
35 xand y coordinates of the upper-left corner of the draw‐
36 able region; dwand dh define the width and height, in
37 pixels, of the drawable region.
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40 outputs video from a drawable. The position and size of the destina‐
41 tion rectangle is specified by vx, vy, vw, and vh. The position and
42 size of the source rectangle is specified by dx, dy, dw, and dh.
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44 Drawable data is clipped to the bounds of the drawable, scaled to the
45 requested video region size (or the closest size supported) and clipped
46 to the bounds of the video encoding. The contents of any region not
47 updated with drawable data is undefined.
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49 If video is successfully initiated, an XvVideoNotify event with detail
50 XvStarted is generated for the drawable. If the port is already in
51 use, its video is preempted, and if the new drawable is different than
52 the old, an XvVideoNotify event with detail XvPreempted is generated
53 for the old drawable. If the port is grabbed by another client, this
54 request is ignored, and an XvVideoNotify event with detail XvBusy is
55 generated for the drawable.
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58 [Success]
59 Returned if XvGetVideo(3) completed successfully.
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61 [XvBadExtension]
62 Returned if the Xv extension is unavailable.
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64 [XvBadAlloc]
65 Returned if XvGetVideo(3) failed to allocate memory to process
66 the request.
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69 [XvBadPort]
70 Generated if the requested port does not exist.
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72 [BadGC] Generated if the requested graphics context does not exist.
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74 [BadDrawable]
75 Generated if the requested drawable does not exist.
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77 [BadAlloc]
78 Generated if there were insufficient resources to process the
79 request.
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82 XvGetStill(3), XvPutVideo(3), XvVideoNotify(3)
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86X Version 11 libXv 1.0.11 XvGetVideo(3)