mmmh.. now it seems not working even with a small number of frames. i'll try to learn better

hi! i'm new to this forum (and newbie in puredata.. started yesterday

i'm trying a simple patch ( to add delay to a live video), with the final part of the gemhead looking like this:

[pix_video]----[pix_delay Number_of_frames]-----[pix_texture].

Now, it works just with little numbers.. but if try something rough, e.g.
[pix_delay 2000] , puredata crashes.

unfortunately, i'd like to achieve at least a 15 second delay between the camera input and the video output.

Any suggestion? (better way to do this.. but even a little explanation about the buffering in pure data will be wellcomed).

Thanks for support!