Half Frames in Final Cut and Motion

Hi,
This has probably been asked before, and if not I'm surprised, but here goes -
I'm editing a music video with images, and I need the images to change on the beat of the song.... but we have worked out that they need to change every 24.5 frames. But neither Final Cut nor Motion will allow the image lengths to be cut to half a frame. It's either cut at 24 or 25 but not in-between. Obviously this messes up the whole flow of the video. It mustn't be a rare problem, especially in the music video world where there is a lot of cutting to a beat. Is there anyway to achieve this? The time line is split into frames but the playhead (and any attempts at stretching the clip) always snap to the frame (even with snap turned off).
Is this an inherent problem? Is there no solution?
If anyone has an answer I will be over joyed to find out!!
Thanks!

Obviously this messes up the whole flow of the video. It mustn't be a rare problem,
especially in the music video world where there is a lot of cutting to a beat.< </div>
Well, it's rare that an editor refuses to cope with the limitations of his medium of choice. You can do frame-by-frame examinations of dozens of "music videos" and you will see they all cut on the temporal borders of frames or they create an alternative transition.
If you cut one image at 24, the next one at 25, and repeat the cycle, it is physically impossible for the human eye/brain--ear/brain encoding and decoding system to perceive there is a difference (Although, forced to view a long sequence of these cycles, a viewer might sense a rhythm. It remains unlikely it will be identified as a one-frame difference in the cutting rhythm.) Ask any psychologist. The same principles of visual perception and persistence of vision long ago established 12 frames per second as the minimum image-change rate required to convey the illusion of animation, even in a 30fps timebase. That's why interlacing works.
You can help hide the change by accepting and then imposing a two-frame transition of some kind.
bogiesan

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My project worked fine merely 3 months ago... what happened since?
Updates
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Half Frames in Final Cut and Motion

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