I see. Thanks!
Ronald Bultje wrote:
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
