Camera Virtualization

gstreamer.txt

gst-launch-1.0 -v v4l2src device=/dev/video0 ! \
   ffmpegcolorspace ! \
   video/x-raw-rgb ! \
   ffmpegcolorspace ! \
   video/x-raw-yuv,format=\(fourcc\)YUY2 ! \
   v4l2sink device=/dev/video2

# Alternative
gst-launch-1.0 -v v4l2src device=/dev/video2 ! \
   v4l2sink device=/dev/video5

v4l2loopback.txt

ls /dev | grep video
sudo depmod -a

# Remove loopback devices
sudo modprobe -r v4l2loopback

# Enable Loop Back Devices (Method 1)
sudo modprobe v4l2loopback video_nr=2 card_label="My Fake Camera" exclusive_caps=1 devices=1

# Enable Loop Back Devices (Alternative Method)
sudo insmod /lib/modules/5.3.0-46-generic/extra/v4l2loopback.ko exclusive_caps=1 video_nr=2 card_label="Fake"

# Check Device
v4l2-ctl --device=/dev/video2 --all

# Method 1: Record Desktop
# sudo ffmpeg -f x11grab -r 25 -s 416x768 -i :0.0+0,0 -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video2

# Method 2: Record RTMP Stream
ffmpeg -f flv -listen 1 -i rtmp://localhost:1935/live/app -f v4l2 /dev/video2

# Check the output
ffplay /dev/video2
udevadm info --name=/dev/video2

virtualbox.txt

# Attach camera to guest machine

VBoxManage list webcams
VBoxManage controlvm "android" webcam attach /dev/video2