doesnt work on raspberry

[ghost]

see here -> http://stackoverflow.com/questions/31844531/library-webcam-capture-by-sarxos-not-working-on-raspberry

[sarxos]

Hi @kolonka,

People did experience problems with Raspberry Pi in the past using default driver. The solution in your case may be replacing driver by a different one, e.g. webcam-capture-driver-v4l4j which seems to be the most stable on RasPi.

The JARs you have to include in your classpath:

• v4l4j-0.9.1-r507.jar
• webcam-capture-driver-v4l4j-0.3.11-20150713.101304-10.jar

The webcam-capture-driver-v4l4j is only for Linux and for now it is compiled for x64 and armhf architectures. In case of x32 or armel you will have to compile it on your own so please verify what arch your RasPi is - either armel or armhf.

The code:

static {
    Webcam.setDriver(new V4l4jDriver()); // set driver to be used
}

public static void main(String[] args) {
    JFrame frame = new JFrame("V4L4J Webcam Capture Driver Demo");
    frame.add(new WebcamPanel(Webcam.getDefault()));
    frame.pack();
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

[ghost]

i am using standard raspbian from https://www.raspberrypi.org/downloads/
when i test your code, i get noclassdeffounderror ...webcamdriver
caused byclassnotfoundexception ... webcamdriver

sth is still wrong

i imported the following libs:

birdj-0.7.0
slf4j-api-1.7.2
v4I4j-0.9.1-r507
webcam-capture-0.3.10
webcam-capture-driver-v4I4j-0.3.11-20150713.101304

[sarxos]

You need these JARs:

• slf4j-api-1.7.2
• v4I4j-0.9.1-r507
• webcam-capture-0.3.10
• webcam-capture-driver-v4I4j-0.3.11-20150713.101304

Please provide detailed exception. The "noclassdeffounderror" or "byclassnotfoundexception" are meaningless without the class names.

[sarxos]

Just FYI, http://qablog.practitest.com/2008/12/principles-of-good-bug-reporting/

[ghost]

ah.. i run the wrong artifact, its taking pictures now... but there is a fail with your logger:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

i solved this last time by adding another slf4j library

[sarxos]

Indeed, this warning tells you that SLF4J has no binding added to the classpath. You can either use slf4j-simple or some more sophisticated one like Logback which is my favourite one.

I haven't added binding to the classpath on purpose because most people does not need it and I had reports in the past about making logs less verbose (now you can control verbosity on your own through the logger configuration).

I'm glad the issue is resolved. In case of any additional issues please do not hesitate creating new ticket.