OpencvVideo plugin ¶

Goal ¶

The OpencvVideo plugin is in charge of capturing a video with a webcam on linux.

Driver installation ¶

Linux driver ¶

There is no driver to install, it's native.

Windows driver ¶

TODO

Compilation ¶

First, make sure the CMakeList.txt at the root of the directory is well configured (into trunk/). In order to install the OpencvVideo plugin, modify the file and verify you have the following line :

add_subdirectory(OpencvVideo)

Also, the environment variable $PACPUS_ROOT must point to the pacpus installation directory (you normally already set it when you installed PACPUS).

Then we need to configure the installation :

$ export PACPUS_ROOT=/opt/pacpus/0.2.3 # Pacpus Framework path
$ cd trunk/build/ # first go into the build folder
$ cmake ..

Now we can compile and install :

$ sudo make install

Make sure the executable files you just created are copied into $PACPUS_ROOT/lib/.

We can also use build_linux.sh to compile

$ cd trunk/build/ # first go into the build folder
$ ./build_linux.sh

Execution ¶

In order to work with the plugins we want, PACPUS needs an XML file.

XML configuration ¶

<?xml version="1.0" encoding="ISO-8859-1"?>
<pacpus>
        <components>
                <component name="webcam" 
                        type="CVWebcam" 
                        device="0" 
                        width="640" 
                        height="480" 
                        framerate="25" 
                        ui="true"                               
                        recording="true" />
        </components>

        <connections></connections>

        <plugins prefix="lib" postfix="" extension="so">
                <plugin lib="OpencvVideo" />
        </plugins>
</pacpus>

Running the plugin ¶

Please verify that you have a working pacpus installation on your system: refer to the GettingStarted page.

Testing under Linux ¶

Run the pacpus plugin with this command:

cd $PACPUS_ROOT
./PacpusSensor OpencvVideo.xml 

Remark: you can check that the USB camera is well known by linux with lsusb

$ lsusb 
Bus 002 Device 004: ID 099a:7202 Zippy Technology Corp. 
Bus 002 Device 003: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 Wireless Adapter
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 1546:01a8 U-Blox AG 
Bus 003 Device 008: ID 1415:2000 Nam Tai E&E Products Ltd. or OmniVision Technologies, Inc. Sony Playstation Eye
Bus 003 Device 002: ID 09d7:0100 Novatel Wireless NovAtel FlexPack GPS receiver
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

We can see here the Sony Playstation Eye camera detected on USB.

Testing under Windows ¶

TODO