About: http://webisa.webdatacommons.org/417978842

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	ffmpeg -i $f.mp4 in your command will look for e.g. files.mp4.mp4, which you probably didn't mean
http://www.w3.org/ns/prov#wasQuotedFrom	askubuntu.com