Hi Jeffrey, On Wed, 2003-02-19 at 22:27, Jeffrey Dever wrote: > I don't understand the point of the VIDIOCCAPTURE ioctl. I expected > that I would have to call it before doing a read(). But there is no > need, after VIDIOCSWIN the read works anyway. > > According to the v4lapi: > > Merely setting the window does not enable capturing. Overlay > capturing is activatied by passing the VIDIOCCAPTURE ioctl a > value of 1, and disabled by passing it a value of 0. > > So what is the function of this ioctl? It enables video overlay, which is defined as "grabbing/capture to the videocard's overlay framebuffer". Ronald -- Ronald Bultje <rbultje@xxxxxxxxxxxxxxxxxxx>
