John, Try this header: #include <linux/videodev2.h> Yiliang <div class="gmail_quote">On Sun, Mar 21, 2010 at 8:38 PM, John Buckley <<a href="mailto:buckleyassoc@comcast.net">buckleyassoc@comcast.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div style="font-family: Arial; font-size: 12pt; color: rgb(0, 0, 0);">Yiliang, 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, John Buckley<div class="im"> ----- "Yiliang Bao" <<a href="mailto:yiliangb@gmail.com" target="_blank">yiliangb@gmail.com</a>> 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. > -Yiliang </div></div></div> ------------------------------------------------------------------------------ Download Intel&#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. <a href="http://p.sf.net/sfu/intel-sw-dev" target="_blank">http://p.sf.net/sfu/intel-sw-dev</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>