Une autre méthode plus simple : Objets et animation : Définissez deux points d’opacité (100 et 0)
Another simpler method: Objects and animation: Set two opacity points (100 and 0)
Thank you Jill and Denis.
Even with the zip file reduced to 1.5GB neither WinZip, RAR or ExpressZip would extract the file and reported possible corrupt file.
Now using 7Zip as recommended by Denis, it worked and the problem solved!
Regards
Roel