I have a new webcam HD Elianzo.
Works perfect out of the box only I have low resolution 640x640 so I need support.
Is there a driver for linux ?
If it is working at all in Linux environment, you have driver support. 
To find the driver, look for the relevant output form the following command…
usb-devices
It will list all connected USB hardware, one block will pertain to the webcam device.
Yes i see a list usb-devices
The problem is not that the webcam not worked but is shows only low resolution 640x640
Your first question was whether a Linux driver existed. The output from the command I gave you will tell you exactly which driver is loaded. I expected that you would post the relevant section including the chipset details. Then others might be able to advise further.
This may be of value to you
https://wiki.archlinux.org/index.php/webcam_setup#Command_Line
A wiki page that has some practical info concerning v4l2-ctl and should be applicable to your hardware
Vendor =1b3f General Webcam
Try guvcview to see if there is a higher resolution.
Which program need a higher resolution?
OBS studio for making 3d tutorials.
That not enough IMHO. typically one should provide xxxx:yyyy but you only provided the xxxx (vendor) but not the yyyy (product).
I don’t see that vendor ( 1b3f ) listed in the UVC listing of supported webcams: Linux UVC driver & tools … but that could be an out of date list.
The UVC FAQ gives excellent information for troubleshooting webcams - prior to going to the UVC list for help.
I see no vendor name :
lsusb
Bus 002 Device 004: ID 046a:0023 Cherry GmbH CyMotion Master Linux Keyboard G230
Bus 002 Device 005: ID 1b3f:2247 Generalplus Technology Inc.
Bus 002 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Solved the problem could now change the resolution with webcamoid.
Anton, thanks for sharing your solution.
I do note that that information was what we needed to help - but I see now you have solved which is great.
For anyone else watching this thread, here is a problem solving technique. I used the (late provided) info from ‘anton’ and I did a google search using as a search criteria: " Generalplus Technology Inc. webcam 1b3f:2247 "
That gave me a number of hits, but one at the top of the google list was this: Get webcam resolution and info on Ubuntu and fix HD - Raymii.org
Date of post: : 23-08-2020
It refers to that same web cam, describing the same problem , and gives that fix.