<class>/<patientnumber>/<sequence-name(.avi/.mp4)>
cropped/
<class> needs to be provided as the argument "--folder"
1st: Top center corner of the echocardiography
2nd: Lower left corner of the echocardiography
3rd: Lower right corner of the echocardiography
press "c" to crop
press "s" to save
press "r" to reset
press "q" to quit