Use your Android phone as webcam

Read in this website the complete article:

http://www.dev47apps.com/droidcam/linuxx/

in short:

cd /tmp/

wget https://www.dev47apps.com/files/linux/droidcam_latest.zip

echo "7775e36b5325dc1f32d485eb3cc72fd1 droidcam_latest.zip" | md5sum -c --

unzip droidcam_latest.zip -d droidcam && cd droidcam

sudo ./install

If all goes well, you can ensure the device is installed via

lsmod | grep v4l2loopback_dc

You should see v4l2loopback_dc in the output.

Open up a V4L2 compatible program (VLC player, Skype, Cheese, etc) and you should see DroidCam listed as a video device (or it might be listed as /dev/video).

Start the droidcam client via the Terminal, or create a launcher if you’re using gnome. There is also a simpler cli client: droidcam-cli which you can use.

You can change the webcam output resolution as follows:

1. Close any programs using the droidcam webcam. Unload the device driver:

sudo rmmod v4l2loopback_dc

2. Re-load it with new options (WIDTH and HEIGHT are numbers). :

sudo insmod /lib/modules/`uname -r`/kernel/drivers/media/video/v4l2loopback-dc.ko width=WIDTH height=HEIGHT

Standard sizes (Width x Height): 640×480, 960×720, 1280×720 (720p), 1920×1080 (1080p).

3. Restart the droidcam client to reload the settings, and test it out. You can keep changing the resolution.

4. Edit the text file /etc/modprobe.d/droidcam.conf with the new options to make the change stick.

On the phone install the app Droidcam (free) of DroidcamX (paid)

and read here how to connect:

http://www.dev47apps.com/droidcam/connect/