Overlay image with webcam using v4l2loopback

webcamcruft.sh

#!/usr/bin/env bash

#sudo rmmod v4l2loopback
#sudo modprobe v4l2loopback devices=1 card_label="KEV CAM"

# -vf "drawtext=fontfile=/home/krpors/Development/qualogy/qualogy-revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.ttf:text='Tijn sux':fontcolor=white:fontsize=48:box=1:boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2" \
# pix_fmt yuv420p is required for firefox etc!

ffmpeg \
	-i /dev/video0 \
	-i napoli.png \
	-filter_complex "[0:v][1:v] overlay=25:25" \
	-pix_fmt yuv420p \
	-f v4l2 /dev/video2


exit 0


# edge detect
ffmpeg \
     -i /dev/video0 \
     -i napoli.png \
     -filter_complex "[0:v][1:v] overlay=25:25, edgedetect=low=0.1:high=0.2" \
     -pix_fmt yuv420p \
     -f v4l2 /dev/video2


# chromatic aberration
ffmpeg \
      -i /dev/video0 \
      -i napoli.png \
      -filter_complex "[0:v][1:v] overlay=25:25, rgbashift=rh=-10:bh=-10:edge=smear" \
      -pix_fmt yuv420p \
      -f v4l2 /dev/video2

# rotate meuk:
ffmpeg \
      -i /dev/video0 \
      -i napoli.png \
      -filter_complex "[0:v][1:v] overlay=25:25, rotate=0.5*sin(0.1*PI*t)" \
      -pix_fmt yuv420p \
      -f v4l2 /dev/video2

# Nog beter:
ffmpeg \
      -i /dev/video0 \
      -i napoli.png \
      -filter_complex "[0:v][1:v] overlay=sin(2*PI*t)*25:cos(2*PI*t)*25" \
      -pix_fmt yuv420p \
      -f v4l2 /dev/video2


# sobel crap
ffmpeg \
      -i /dev/video0 \
      -i napoli.png \
      -filter_complex "[0:v][1:v] overlay=25:25, sobel=planes=0x1:scale=2" \
      -pix_fmt yuv420p \
      -f v4l2 /dev/video2

# border:

 ffmpeg \
      -i /dev/video0 \
      -i napoli.png \
      -filter_complex "[0:v][1:v] overlay=25:25, fillborders=top=50:left=50:right=50:bottom=50:mode=fixed:color=00aa00" \
      -pix_fmt yuv420p \
      -f v4l2 /dev/video2


# gay filter
 ffmpeg \
      -i /dev/video0 \
      -i napoli.png \
      -filter_complex "[0:v][1:v] overlay=25:25, geq=r='X/W*r(X,Y)':g='(1-X/W)*g(X,Y)':b='(H-Y)/H*b(X,Y)'" \
      -pix_fmt yuv420p \
      -f v4l2 /dev/video2

# Stream image to video
ffmpeg -loop 1 -framerate 1 -i windows\ update.png  -r 30 -pix_fmt yuv420p -f v4l2 /dev/video2