User`s guide

132
Customize Keystrokes
This will open a window that tells you how to customize keystrokes. First find the command
that you want to assign or change a keystroke to from its place in the menu. Then hold down the
Control Key and click on it. A Customize keycode window will pop up that will let you choose
the keystroke you want to assign this command to, and whether you want to hold down the Shift,
Option, or Command button when using it.
NLE Calibration Movie
This feature allows you to create a black NLE movie that you can play using any NLE system.
The Calibration Movie contains Row and Column information that will display captions telling
you which rows and columns have available pixels to store captions in. This is especially helpful
if you are not familiar with the specific type of NLE system or hardware you are using.
The closed caption content of the first 5 seconds of the movie is "R 0, C 14" and it is generated
with Primary Row set to 0 and Starting Column set to 14; the next 5 seconds of the movie has the
CC content of "R 0, C 15" and is generated with Primary Row set to 0 and Starting Column set
to 15. This continues through Row 0 and Column 40 at which time it shifts to Row 1 Column 15.
The last movie segment is Row 3 Column 40. The entire movie is approximately 4 minutes long.
When the you import the video into your NLE system, put it on the timeline and play the video
through your NLE hardware to a TV with the built-in closed caption decoder set to CC1 channel,
you will see the content of the Primary Row and Starting Column only when it successfully
decodes the captions. You just have to watch the TV screen for
up to 4 minutes
R 0, C 21
until you see a
few captions like
R 0, C 22
R 0, C 23
.
.
R 0, C 29
To avoid errors, we will pick the mid value of all visible column numbers. In this example it is C
25. So the preset NLE values for your NLE system is Primary Row: 0 and Starting Column: 25.
Once you have determined these values you need to go to the NLE tab in the Preferences and
enter the numbers into the appropriate boxes. You do not need to change the number in the
Secondary Row box and the check box labeled Small QuickTime should be unchecked.
Scene Detection
The Scene detection function scans the entire movie looking for changes in the luminance of
successive video frames. If there is a gradual change in the luminance of successive video frames
then a dissolve is indicated; if the change is abrupt then a cut is indicated. In the Preferences
menu under the Display Tab there is a check box labeled Caption Overlaps Scene Transition.
If this box is checked and the scenes in the current movie have been scanned MacCaption will
display an error whenever a caption is found to display during a dissolve or cut transition.