Hardware Reference
In-Depth Information
-op or --opacity (Preview Opacity)— Controls how transparent the preview window
appears. Possible values are any whole number from 0 to 255, where 0 is completely
transparent and thus invisible and 255 is completely visible. Using a value around 128
allows you to see the live preview, but also read the text behind the preview.
-p or --preview (Preview Window Control)— Sets the size of the preview window,
and where it appears. The value should be given as X,Y,W,H where X and Y are the pixel
co-ordinates where the window's top-left corner should be drawn, and W and H the
width and height of the preview window in pixels.
-rot or --rotation (Rotate Capture)— Rotates the captured image or video through
any arbitrary angle. Values for this option should be given as a whole number of clock-
wise degrees, where 0 is no rotation and 359 the maximum possible rotation.
-sa or --saturation (Saturation)— Adjusts the colour saturation of the captured
image or video. Possible values for this option are whole numbers ranging from -100
(minimum saturation) to 100 (maximum saturation.)
-sh or --sharpness (Sharpness)— Adjusts the sharpness of the captured image or
video. Possible values for this option are whole numbers ranging from -100 (minimum
sharpness) to 100 (maximum sharpness.)
-t or --timeout (Capture Timeout)— Controls the timeout, in milliseconds, that the pre-
view window will appear. While shared between the tools, the action of the --timeout
option is different: in raspistill , the --timeout option will set the time until the
picture is captured; in raspivid , the option will set the time for which video will be
recorded. A value of 0 in raspistill captures an image immediately; a value of 0 in
raspivid continues to record indefinitely.
-v or --verbose (Verbose Messaging)— Verbose mode tells the capture application
to output as much detail of what it is doing as possible to the console or terminal. This
is usually only used for debugging errors in the software, as it allows the user to see at
what point the capture fails.
-vf or --vflip (Vertical Flip)— Flips the image through the vertical axis. Most com-
monly used when the camera cannot be positioned the correct way up, with the con-
necting ribbon cable exiting from the bottom. If the camera is at an angle other than
upside down, try using the r otation option to control the final captured image.
-vs or --vstab (Video Stabilisation)— Attempts to correct for the camera's sensor
shaking. Commonly used when the Raspberry Pi or its Camera Module is held in the
hand, or attached to a robot, vehicle or other moving platform.
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