Editing cinema commercial with 25fps footage

[Shane Ross]

25fps is the frame rate in Europe. Tape, film…both. 24fps is the frame rate for film here in the US…although for video we use 30 fps (29.97).

What is the target output of this? Film? To play in theatres here in the US? or in Europe?

[Henninc]

target would be cinema (24fps), here in europe.
thanks

[Peter Mcauley]

I recently completed a Lexus cinema ad here in Canada that originated on digibeta pal at 25 fps. What we did was bring it in at 25 fps but put itinto a 24 fps timeline. This makes the spot phiysically longer. Normally a 60 second spot at 24 fps is 1440 frames. At 25fps it is 1500 frames. So we ended up with 60 extra frames which now makes our spot 62.5 seconds. We chose this method because we wanted to avoid the frame blending artifacts associated with speed changes. We now had a one to one video to film rate for the film record. We then took our audio mix and slowed it down (96.25%) and harmonized the pitch back up so that it didn’t sound slow. The resulting composite film print looked and sounded great after the uprez and film record. I’ve done it the other way of using a speed change and on the big screen the frame blending was not great. A couple of words of caution though. Make sure that the cinema buy will allow a longer play. Most chains are fine with submitting a slightly longer spot but your client should check with the media buy to make sure it’s ok. Secondly I put a two beep at the head and one at the tail to check the accuracy of the synch after it was harmonized. We also were mixing to 29.97 video so we took our1500 frames and added puldown to it before we layed it out to tape for the mix.

Peter McAuley
Axyz Edit
Toronto
G5 dual 2.0
4 gigs ram
10.3.8
FCP 4.5 HD
QT 6.5.2
Kona 2 v1.1 with K Box
4 X 250 gig external F800 Lacie firewire drive
2 X 23″ Apple cinema display

[Henninc]

Thanks for that, Peter.