With video opened at the beginning of timeline (00:00), thumbnails show up fine when hwdec=yes and hwdec=no
With video opened at a random position of timeline (example 01:22) because of save-position-on-quit=yes option, only grey thumbnails are showing when hwdec=yes
hwdec=yes
andhwdec=no
save-position-on-quit=yes
option, only grey thumbnails are showing whenhwdec=yes