Follow the below procedure if you are unable to play recorded videos on Lukas Viewer


1. For those who use Lukas Viewer for HD models 
    1) Problem: Unable to play recorded videos on Lukas Viewer
        This happens when the versions of the viewer and the firmware differ from each other.
        If you use the older versions of Lukas Viewer, the viewer will only recognize and play MP4 files, 
        while the device with the latest firmware saves videos in AVI format, causing the above problem. 
        To solve this problem, you will have to download the latest version of Lukas viewer AND
        the latest firmware for the device.

     Click here to download the latest Lukas viewer.

     Click here to download the latest firmware update.


    2) Problem: Lukas Viewer shows only a black screen when playing the recorded video.
        If you are unable to see "ffdshow" in red icon, it means that the codec IS installed  but 
        NOT running properly.
        In this case, you have to delete both the ffdshow program and Lukas viewer. 
        Then try re-downloading Lukas viewer on your computer.
        If the same problem occurs after completing the above procedure, try upgrading to the  
        latest firmware for the graphics card and/or the monitor.



2. For those who use Lukas/Qvia Viewer for FHD models 
    Problem: Lukas/Qvia Viewer shows a black screen when playing the recorded video

        This happens when .NET Framework 3.5 or higher is not installed on your computer.
        For Windows XP or later, .NET Framework 3.5 (or higher) is automatically installed on
        every computer.

        1) Check if you have the latest Service Pack installed for the version of Windows you have
            on your computer.
            If Service Pack 3(SP3) or later is not installed on your computer, .NET Framework 3.5 
            will not work properly.
            If there is no SP3 installed, please download SP3 or the latest one if available.

        2) How to check whether or not .NET Framework 3.5 (or higher) is installed on your computer.
            Control Panel > All Control Panel Items > Programs and Features > Uninstall or change
            a program > Check the list of installed programs
            (the Official name of .NET Framework 3.5 : Microsoft.Net Framework 3.5 Client Profile")

            


        3) If .NET Framework is not installed on your computer, go to any search engine and enter
             ".NET Framework" or "Framework 3.5" Then install .NET Framework 3.5 or higher.

        Click for direck link to Microsoft Download Center