I am editing a XDCAM EX1 material in FCP 6.03 and wants to mix the frame rates 25fps and 23.98fps on the same timeline. The timeline settings are 1920x1080p/25fps VBR.

Now to my question.
When I import the files trough the XDCAM transfer software (version 2.5.1) and play the files in the timeline (not in the viewer window), the shots made in 23.98fps gives a strobish feeling.
Why is that and is it possible mixing frame rates without getting this strobing picture?

I made a QT export of a 23.98 fps clip converting it to 25 fps and importing it back into the FCP proyect. And now it looks good. But i want to avoid this for various reasons.

I am working on a Macbook pro, 2.4 GHZ Intel Core 2 duo, 2 gb RAM.

Thanks in advance

I don't know the answer as I've never used any PAL rates, but I have mixed lots of different frame rates and codecs successfully (though with renders) by using a Prores 60p timeline--handles pulldowns nicely.

Thanks Rob, now the playback is normal for all the different frame rates (with the timeline in 50p) but I wonder why happens that strobe effect for the material in 23,98 when is played in 25p timeline.

I don't know, but I'd guess that the cadence is just too odd--trying to spread 24 frames over 25 is tough--would have to just duplicate one frame maybe?