I downloaded a test torrent of a video file and tried creating its image sheet. It seems that ffmpeg is taking too long time for creating a single Thumbnail. (It took me 100-110 seconds) (My server is E3-SAT 2 on SoYouStart with only 1 torrent in seedbox).
Also the size of generated Image Sheet was 1.5-2 MB. I think it should be between 250-600 KB.
I have tried creating screenshots by this tool : http://moviethumbnail.sourceforge.net/
But it was via SSH, and it took 3-4 seconds. and the size of image was 450 KB.
Guys I am not at all complaining about the script This script is wonderful, and to see it freely available with such a great community and support is superb.
Thanks & warm regards.