[gst-devel] VIDIOC_S_CTRL with GStreamer

[John Buckley]

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 

----- "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. 
> -Yiliang 


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