I only watched it once during last November's London O2 Arena gig.
It seems either French or Italian film shot in late 50s to early 60s.
I thought Jean-Paul Belmondo and Jeanne Moreau might be in the film.
I knew they worked together twice around that time (Moderate Cantabile and Une Femme est une femme), but these films aren't the film which had been shown.
In the film there was a boy who looked 8-10 years old, but I didn't recognise him.
*edit*
It could be Les Tricheurs directed by Marcel Carne, but I haven't watched it yet.