sparrow/src/main/resources/logback.xml

<configuration>
    <statusListener class="ch.qos.logback.core.status.NopStatusListener" />

    <logger name="com.github.sarxos.webcam.Webcam" level="OFF"/>
    <logger name="com.github.sarxos.webcam.ds.cgt.WebcamOpenTask" level="OFF"/>
    <logger name="com.github.sarxos.webcam.ds.cgt.WebcamCloseTask" level="OFF"/>

    <define name="appDir" class="com.sparrowwallet.drongo.PropertyDefiner">
        <application>sparrow</application>
    </define>

    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>${appDir}/sparrow.log</file>
        <encoder>
            <pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
        </encoder>
    </appender>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%date %level %msg%n</pattern>
        </encoder>
    </appender>

    <root level="debug">
        <appender-ref ref="FILE" />
        <appender-ref ref="STDOUT" />
    </root>
</configuration>