flashes on frame rate changes

Anything and everything to do with DCP-o-matic.
marcelmax
Posts: 39
Joined: Sun Mar 25, 2018 6:55 pm

flashes on frame rate changes

Post by marcelmax »

Hi,

when screening short film playlists with DCPs created by DOM in a cinema we notice short flashes at the moment the frame rate switches i.e. from 24 to 25. DCP A wit 24 fps ends - short flash - DCP B with 25 fps starts (or vice versus).
Of course we do not know if it's a DOM issue, but: Has anyone an idea how to solve?

Thanks!
Marcel
Carsten
Posts: 2804
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: flashes on frame rate changes

Post by Carsten »

Some servers do that, some not. Typically, it's a 24/25 fps issue. Is this a Dolby DSS server?

You can try to put short server blacks between CPLs, or do short dowser close/opens to mask the flashing.

Another option would be to conform all CPLs in a program block to the same frame rate with DCP-o-matic.

- Carsten
marcelmax
Posts: 39
Joined: Sun Mar 25, 2018 6:55 pm

Re: flashes on frame rate changes

Post by marcelmax »

Hi,

thanks!

"Another option would be to conform all CPLs in a program block to the same frame rate with DCP-o-matic."

What does happen with different frame rates in this case? Speed change?

Thanks!
Marcel
carl
Site Admin
Posts: 2550
Joined: Thu Nov 14, 2013 2:53 pm

Re: flashes on frame rate changes

Post by carl »

Speed change, indeed.