website/content/blog/v4l2-webcam.md

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2020-05-26 00:21:03 -04:00
---
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title: "Loopback Webcam Device with V4l2"
2020-05-26 00:21:03 -04:00
date: 2020-05-25T23:49:08-04:00
draft: false
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tags: ["Audio-Video"]
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medium_enabled: true
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aliases:
- /blog/fakewebcam
2020-05-26 00:21:03 -04:00
---
In Linux you can create a fake webcam by making use of the `v4l2loopback` kernel module.
To install,
```bash
sudo apt install v4l2loopback-dkms
```
If you already had an existing module, remove it so we can customize it.
```bash
sudo modprobe -r v4l2loopback
```
Then create the file `/etc/modprobe.d/fakecam.conf` and add the following line
```
options v4l2loopback devices=1 video_nr=20 card_label=fakecam exclusive_caps=1
```
The value of `video_nr` must be larger than the amount of cameras in your system. I wouldn't have more than 10 webcams plugged into my system, so I set it to 20.
Then load back up the kernel module
```bash
sudo modprobe v4l2loopback
```
Now when you open up Chrome, Skype, etc, you should see a new device labeled "fakecam".