Re: Webcam resolution in VLC (and elsewhere)

[Celejar <celejar@gmail.com>]

On Thu, 31 Dec 2020 21:48:33 +0100
Eugen Dedu <eugen.dedu@univ-fcomte.fr> wrote:

> Hi Celejar,
> 
> To find out the capabilities of your camera, you can install v4l-utils 
> and execute:
> v4l2-ctl --list-devices
> v4l2-ctl -d /dev/video0 --list-formats
> v4l2-ctl -d /dev/video0 --list-formats-ext
> Check also the other /dev/video* files.
> 
> Another method is to use qv4l2 (provided by the homonym package), which 
> is very user-friendly and I think it uses v4l2-ctl to find information.

Thanks. I used the lsusb method described here:

https://askubuntu.com/questions/214977/how-can-i-find-out-the-supported-webcam-resolutions

> The above information comes from 
> https://wiki.archlinux.org/index.php/webcam_setup.
> 
> Cheese and vlc must not be used to find out available resolutions.  On 
> my Dell built-in webcam both show 640x480 and below, whereas my camera 
> supports 1280x720, as given by the laptop specification and 
> v4l2-ctl/qv4l2.  As about why do these applications use this resolution, 
> I do not have any idea.

Interesting. On my machine, Cheese does seem to correctly list the
available resolutions.

Thanks again,

Celejar