thumbnail & watermark

[yarez0]

Me again sorry,

options WATERMARK and THUMBNAILS don't work at all on any player version, did I miss something ? all the options are sets while synchronizing but when videos are played, no watermark or thumbnails.

thanks

Piwigo 2.9.4
Système d'exploitation: Linux
PHP: 7.2.9-1+020180901081133.4+stretch1.gbpdaac35
MySQL: 5.5.61 [2018-09-06 14:45:04]
Bibliothèque graphique: External ImageMagick 6.9.7-4
theme bootstrap_default
videojs 2.9.b