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Video tutorial: "Understand keyframes"


The Keyframe Indicator is the disk located between the Play and the Scissors buttons. It indicates the category of the current frame. The " Sticky-mode" checkbox controls whether rounding to nearest keyframe is done and also whether left and right arrows step frame by frame or keyframe by keyframe.


keyframe.jpeg


Some video formats can only cut with guarantee on some particular frames, called Keyframes, and SimpleMovieX enforces a keyframe-only policy to avoid you bad surprises. You can always override Keyframe rounding by unchecking the button inside the disk, this is called Non-sticky mode. But in this case the result you get after saving will be somewhat unpredictable (except if you save in QuickTime format or export to another format, in both cases there will be no surprise).

Keyframe mode can also be switched from sticky to free by pressing S key.