23:56 Nov 11 

pour moi c'est évident: La personne qui filme ces passants s'amuse à leur donner des noms et les prend nature tels qu'ils sont sans pose!

21:10 Nov 11 

Tout ce que je sais, c'est que "saisis sur le vif" voudrait dire que la personne qui filme prend des photos/caméscope des passants "from real life" (unposed).

20:00 Nov 11 

Well, Françoise helped me understand the context. (To be confirmed by the asker, though! She's not really helpful up to now!) I would understand that The character, in the film, is travelling on rollers and commenting on the persons he encounters on his way, persons which shortly appear on the image (saisis sur le vif)... I suppose he encounters people that he knows, so he can tell their names.

19:01 Nov 11 

not the film-maker, I presume. And without context we are not able to figure out who the persons he names are, nor whether he is filming or taking photos. Just rolling...

16:36 Nov 11 

I don't think it makes sense with "nommer", either. "Saisis" collated with "sur le vif" doesn't go with "nommer"? It does makes sense, though, if you got rid of "saisis" and just said "nommer sur le vif"

filmer des passants saisis sur le vif = people going by are filmed from life

06:39 Nov 11 

usually referring to photographers or painters, "sur le vif" means "live" ... as in this beautiful video
http://www.youtube.com/watch?v=8q8_MDB6T9Q

06:34 Nov 11 

"Nommer" does not make sense here, "filmer" would (if he is able to shoot while skating, though).

22:37 Nov 10 

siasis sur le vif sounds as the person on rollers is filming these people he happens to bump into

22:35 Nov 10 

What it means is that he gives names to the passers by