The VideoLAN Forums

VLC 2.2.6 umbrella
OS: Windows 7

I thought snapshots were being given system time-stamp; but on closer inspection the file naming is revealed to be a total mystery!

A series taken within a few seconds:
vlcsnap-3148-06-03-21h40m35s862.png created 2018-03-18 3:51:47 PM
vlcsnap-1159-09-21-18h41m36s324.png created 2018-03-18 3:52:00 PM
vlcsnap-9740-09-01-06h21m26s087.png created 2018-03-18 3:52:06 PM

within a few hours:
vlcsnap-7442-09-04-07h53m11s574.png created 2018-03-16 8:48:39 PM
vlcsnap-0507-01-12-00h56m45s630.png created 2018-03-16 9:26:37 PM
vlcsnap-5262-07-01-21h22m18s651.png created 2018-03-16 11:48:26 PM

I haven't changed the snapshot naming preference. It is set to "vlcsnap-"
Are there variables documented that can be entered?

snapshots are formated as "{perfix}{year}-{month}-{day}-{hour}h{min}m{sec}s{msec}.{ext}" .
This seems to be working properly with vlc 3.x, could you test with the latest version?