CinePlex v3 Manual - Plexon Inc

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Occurrences of Marker, and makes the occurrence time of the entry
in Marker To Adjust equal to the time of the best match occurrence.
3 To determine the best match occurrence of the entry in Snap-To
Occurrences Marker, click one of the following items:
• Snap-to Previous Occurrence: Click this item to use the occurrences
that are positioned immediately before the times of the entry in Marker To
Adjust. This adjustment always reduces the time of the occurrences
being adjusted.
• Snap-to Next Occurrence: Click this item to use the occurrences that
are positioned immediately after the times of the entry in Marker To
Adjust. This adjustment always increases the time of the occurrences
being adjusted.
• Snap-to Closest Occurrence: Click this item to use the occurrences that
are closest in time the entry in Marker To Adjust. This adjustment can
shift the occurrence being adjusted either direction in time.
4 If the entry in Marker to Adjust is an Interval-type marker, it consists of two
times—a start time and an end time. To adjust the span, which can change
the duration of the interval by making both the start and the end times snap to
their respective best match occurrences, click Snap interval start and end
times independently. To retain the span, which retains the duration of the
interval by only making the start times snap to their best match occurrences
and shifting the end times to match, click to clear the checkbox.
5 Click OK to adjust the occurrences and close the dialog box. A confirmation
dialog box appears to display how many marker occurrences were moved.
The result may be two or more markers with the same timestamp.
Interpolating Missing Marker Occurrences
This tool is useful for adding entries in any gaps in marker occurrences. For
example, when tracking some feature on the video by hand, the user may enter
tracking coordinates only for every nth frame, and then interpolate them to complete
the remaining frames; this is a form of key-frame animation. Also, Cine-
Plex Studio is occasionally unable to provide valid coordinates for some video
frames, for example, when the headset cable for a rat occludes the LED being
tracked. The user may use this tool to complete tracking coordinates for every
frame.
194 CinePlex