Start two processes:

gphoto2 to capture images:

`gphoto2 --port usb: --capture-image-and-download -I 1 --filename=/home/crowd/output/frame%06n.jpg`

The modified 'webcam demo' to analyse and generate json:

`/home/crowd/build/opencv-webcam-demo/opencv-webcam-demo --data /home/crowd/affdex-sdk/data --faceMode 1 --numFaces 80 -o /home/crowd/output-backup/ --draw 0`