[gst-devel] VIDIOC_S_CTRL with GStreamer
buckleyassoc at comcast.net
Mon Mar 22 04:38:23 CET 2010
I found a great example using the V4L2_CID_EXPOSURE control. My problem is, I can't find any info on what headers to include that would define the V4L2_CID_ZOOM_RELATIVE, ABSOLUTE & CONTINUOUS controls.
Does anyone know where those CIDs are defined?
-Thanks in advance,
----- "Yiliang Bao" <yiliangb at gmail.com> wrote:
> Hi John, Yes, you can do this. You can open another file on the same device using following
> function, even if the device is already streaming video.
> fd = open (videoDevName, O_RDWR /* required */ | O_NONBLOCK, 0);
> Usually it is allowed by the v4l2 driver, as long as you are not trying to stream video in the
> second opened instance.
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