The VideoLAN Forums

Thank you! I had looked there previously but hadn't found the option because I had been searching in the subheadings of Video (subtitles, filters, etc.), not directly in Video itself.

I'm pretty sure there is or was an option in VLC preferences to disable the thumbnails that flash up on the screen when taking snapshots. Does anyone know where I can find it? On the VLC for Windows forum, there's an answer to this question but the preferences panel in Mac seems to be quite differen...

I have encountered exactly the same problem: on Mac OS X, as of VLC 2.2+, the screenshots are resized to SAR - this is the case both with JPG and PNG output. Downgrading to 2.1.5 fixed the issue.