The ltmmSelectionModifier constants define the settings for the SelectionModifier properties for the start and stop selection points. You can use them to specify whether the selection should be exact or on a key frame.
typedef enum _ltmmSelectionModifier
{
ltmmSelectionModifier_None,
ltmmSelectionModifier_NearestKeyFrame,
ltmmSelectionModifier_NextKeyFrame,
ltmmSelectionModifier_PreviousKeyFrame,
} ltmmSelectionModifier;
[0] Specifies the selection should be exact, on the time specified.
[1] The selection should be adjusted to the nearest key frame.
[2] The selection should be adjusted to the next key frame.
[3] The selection should be adjusted to the previous key frame.
Note that only the MPEG2 formats currently support a selection modifier. With any other source files, ltmmSelectionModifier_None is assumed.
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