Jerky motion in iMovie '08

Hi,
Am making a short movie which consists mostly of photos but with some short videos intercut. I am also synching to a pre-recorded track. The whole movie plays perfectly until later in, about 2 minutes in, but then some photos play with a short jerk during a Ken Burns effect. All the photos from the begining have the Ken Burns but play without the jerkiness, it's just a few photos, and always the same ones.
Any suggestions or ideas that may help this would be appreciated. Thanks,
Joseph

Hi
No I don't know - but I figure.
with some short videos intercut
One very common origin to jerky/stuttering video is when video is recorded in one standard and the video or iDVD project is set in another.
iMovie'08 and 09 can handle PAL 25fps and NTSC 29.97 (one must specify and keep to this) - If mixed material one need to use another program to convert so that same standard can be kept trough out the project.
iMovie'11 can handle 24fps too.
(most probably i50 and i60 too)
So if video is recorded with a still dgital Camera (most of them can record video) the they usually records in 30fps. And if movie project is set to PAL 25fps jerkieness would be the result.
I use JES_Deinterlacer to convert my 25fps to 29.97fps when making NTSC DVDs for US relatives.
Yours Bengt W

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