Monitoring 111
ProRes 422 HQ 60 fps 60 fps 60 fps 120 fps
Prores 4444 40 fps 60 fps --- ---
The REC OUT contains the same images as the MON OUT during
highspeed mode.
Note: Camera boot time is increased by app. 40 seconds when highspeed mode is
activated.
12.2 Monitoring
The electronic viewfinder and the MON OUT can be used for monitoring
purposes. They can both display the surround view area, an extra 10% of
image outside the recorded area to track any unwanted objects before they
enter the image.
To help the framing, both EVF-1 and MON OUT can overlay frame lines to
the image. These frame lines are an electronic version of the ground glass of
analog cameras.
12.2.1 Frame Lines
Frame lines are stored as XML files. A standard set of frame lines is stored
in each camera. In addition, the user can create personal frame lines
matching his preferences.
Once the idea behind the frame lines system is understood, personal frame
lines can be created with little effort.
Description
The different sections in the file are:
camera: describes the camera that the frame lines file is made for. As
the ALEXA camera system will consist of several cameras in the
future, this is necessary to differentiate between the camera types.
line: all frame lines and the center cross in the active image area
consist of single lines. The line orientation is defined by three
attributes (left and right and bottom or top for horizontal lines, top and
bottom and left or right for vertical lines), where two attributes define
the start and end point, and the third defines the distance from the
parallel image edge.
Distances for start, end and position are relative to the width or the
height of the image and have a precision of 5.
To create a centered frame line with a center cross as in the example,
a total of 6 lines is necessary.
To calculate the position of a line for a given aspect ratio, use the
following formulas:
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