CinePlex v3 Manual - Plexon Inc

5.5 How CinePlex Editor Creates Initial Project Files
When a new CinePlex project is created, CinePlex Editor reads both the neural
data file and the video data file, and it generates markers and marker occurrences
based on the contents of the files. After the initial file reading, CinePlex Editor
stores the generated markers and marker occurrences in the project (CPJ) file.
When the project file is re-opened, CinePlex Editor reads the markers and marker
occurrences from the project file, not from the original neural data or video files.
In this way, one may add, edit, shift, or delete markers without regard for what is
actually in the original neural or video data files. However, when an existing
project file is re-opened, CinePlex Editor still reads the neural data file in order to
obtain the spike timestamps and continuous data, and it still reads the video file to
obtain video frame images.
5.5.1 Reading Video (AVI) Files
When CinePlex Editor reads the video (AVI) file, it looks for timestamps embedded
in the data stored with each frame. CinePlex Studio imbeds these timestamps.
If the embedded timestamps are present, CinePlex Editor creates a special Frame
marker, and it generates a marker occurrence for each video frame. See “Non-
Typical Initial File Creation” on page 276 if there are no embedded timestamps.
CAUTION
Upgrade Notice
If the system has been upgraded to CinePlex Studio 2.0, CinePlex
Editor should also be update. The upgraded CinePlex Editor will
read AVI files created by CinePlex Studio 1.0, 1.1, 1.2, and 1.4.
However, earlier versions will not be able to read AVI files produced
in version 2.0
5.5.2 Reading Plexon (PLX) Files
When CinePlex Editor reads a Plexon (PLX) file during the initial project creation,
depending on the contents of the PLX file, it can create and populate a
number of different markers as follows:
• Non-strobed external events (type 4 data blocks) become Time-Only markers
• Strobed events become a single Scalar marker, with the scalar values set to
the strobe values
• If strobed events are present, and CinePlex Editor identifies them to be in
conformance with the Plexon VideoTracker protocol, then CinePlex Editor
generates additional markers by interpreting the strobe codes as data produced
by Plexon VideoTracker. Depending on the VideoTracker mode
detected, CinePlex Editor creates the following markers:
— One, two, or three Coordinates markers with names like Position n to
denote the tracker positions, when VideoTracker is in LED or Reflective
Color tracking modes.
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