InputVideoQT

Module used for grabbing images from a video source using QuickTime such as iSight or a DV camera with FireWire. The module only works with OS X. The image is scaled to the indicated size regardless of the camera resolution. The module operates in asynchronous mode, which means that the image retreived is the previous one. Ikaros continues to run while the next image is transferred from the camera and the module gets it at the next tick. This can appear confusing when Ikaros is run from the viewer.

Example XML definition

A simple example

  <module
      class = "InputVideoQT"
      name = "VideoSource"
      size_x = "160"
      size_y = "120"
  />

Parameters

Name	Description	Type
class	The class name for the module; must be "InputVideoQT".	string
name	The name of this instance of the module.	string
size_x	Size of the grabbed frame	int
size_y	Size of the grabbed frame	int

Module Connections

Outputs

Name	Description
INTENSITY	The intensity of the image
RED	The red channel of the image
GREEN	The green channel of the image
BLUE	The blue channel of the image

Limitations

It should be possible to run the module also in synchronous mode, where the module would wait for each new frame before continuing.

It is not always possible to open the camera again when Ikaros has not exited normally. This can usually be fixed by dicsonnecting the camera and connecting it again or by waiting a minute or two.

Author

Christian Balkenius
christian.balkenius@lucs.lu.se
Lund University Cognitive Science

Files

InputVideoQT.h
InputVideoQT.cc
InputVideoQT.ikc