Sent: Thursday, December 7, 2017 10:36 AM I wrote >I don't know the usage for unlink. The documentation is here. https://perldoc.perl.org/functions/unlink.html I have just downloaded b09hm0v5 at DVFxsd. It worked fine and deleted the intermediate files correctly. The only problem was that it gave me HE-AAC audio, which I did not want. Best wishes Richard