how to control webcam.

[home user]

(f31; gnome)

I have a Ligitech HD Pro Webcam C920; it connects to the tower via USB port.  I have not been able to find anything installed to control it, for example to get it to zoom in or out.  I also tried dnf and dnfdragora to try to find something to install.

What is available, preferably via dnf, to give me control of my webcam?

[George Avrunin]

On Wed, 19 Aug 2020 16:42:08 -0000, home user wrote:
> (f31; gnome)
>
> I have a Ligitech HD Pro Webcam C920; it connects to the tower via USB
> port.  I have not been able to find anything installed to control it,
> for example to get it to zoom in or out.  I also tried dnf and
> dnfdragora to try to find something to install.
>
> What is available, preferably via dnf, to give me control of my webcam?

I use guvcview.  It's in the Fedora repo.

George

how to control webcam. [SOLVED]

[home user]

(on Wed, 19 Aug 2020 10:54 AM mountain time, George wrote;)
> I use guvcview. It's in the Fedora repo.

Found it.
My system claims it's in the rpmfusion-free repository.
Installed it successfully (dnf install guvcview).

Seems to work.  The real test will be during the next zoom meeting I'm 
an attendee in.

Thank-you, George.
I've marked this thread SOLVED.

Bill.

[DJ Delorie]

I use gtk-v4l to control the webcam during meetings

guvcview has a "-z" option to bring it up in control-only mode,
otherwise it grabs the video stream too.

[Roger Heflin]

From a script you can use uvcdynctrl.  My experience is you can use
this while something else is actively using the webcam.

On Wed, Aug 19, 2020 at 1:45 PM DJ Delorie  wrote:
> I use gtk-v4l to control the webcam during meetings
>
> guvcview has a "-z" option to bring it up in control-only mode,
> otherwise it grabs the video stream too.
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[home user]

> From a script you can use uvcdynctrl.  My experience is you can use
> this while something else is actively using the webcam.

Thank-you, Roger.
If the other two don't work, I'll give this a try.

[home user]

> I use gtk-v4l to control the webcam during meetings

ok,
I just installed that too.  It launches ok, but until I have a zoom (or something similar) meeting, I won't know if it really works.
> guvcview has a "-z" option to bring it up in control-only mode,
> otherwise it grabs the video stream too.

I did not see that option in the man page.  How did you know (or find out) about it?
I get quite a bunch of messages when I run "guvcview -z" from the command line, but the GUI does come up, and it looks ok.  I won't know if it really works until I have a zoom (or something similar) meeting.  I don't know when that will be.

Thank-you for your help, DJ.  I'll try to remember to follow-up once these are really tried.  It may be a few weeks.

[DJ Delorie]

"home user"  writes:
> > guvcview has a "-z" option to bring it up in control-only mode,
>
> I did not see that option in the man page.  How did you know (or find out) about it?

I ran "guvcview --help" and hoped it printed help :-)

[home user]

> > > guvcview has a "-z" option to bring it up in control-only mode,
> > > otherwise it grabs the video stream too.
> > I did not see that option in the man page.  How did you know (or find out) about it?
> I ran "guvcview --help" and hoped it printed help :-)

Where would we be without them double negatives?!
I keep forgetting that functionality.  Here, it worked.  Thank-you.
But the man page should also list that option.