ffmpeg crash when use -filter_complex and doesn't work when use -report options

[SantiAledo]

Hi,
First of all thanks for your work, i think its amazing. I've been trying to place a water mark on my videos, i have two ffmpeg comands that works find in console, but when I put them in the nginx.conf the first one crashes and the second one directly doesn't work. Some idea about reason could be helpful.
Thanks.