You can use MKV to PCX Batch Converter to convert MKV to PCX in batch. Because it supports to add many video files and convert them to image files at a time. The application also allows users to set the image quality and resolution.

The tool application is free for trial and you can download it via clicking here. If you need the full function version, please buy a registration key of single-user personal license by clicking here. Single-user commercial license, multi-user personal license and multi-user commercial license are able to be purchased at the website.

The main interface in Figure1 can give you the acquaintance to the application. There is a table list in the middle of the interface, which is used to list all the MKV files to be converted. You can add MKV files by clicking "Add Video File(s)" button or dragging the video files into the list from your computer. You can also remove video file one by one by clicking on "Remove" button or remove all the files by clicking "Remove All" button. To add files, right clicking the mouse in the list and choosing "Add files" option in dropdown list is available. The button "Preview Video" below the list is used to preview each video file in the list.

Please click "Options" button to open "Option" dialog box. Here you can set all the parameters to output image files in batch conversion. For example, in "Start (Sec)" and "End (Sec)" spin boxes, you can set the start and end time if you want to convert a part of MKV to PCX in batch. You can also set image resolution and quality in "Size (1 to 6000)" and "Quality: (0.01 to 255)" spin boxes. You should choose "PainBrush (*.pcx)" as output format in "File Format" combo box. To control the number of output image files, the value in "Interval (Sec)" spin box must be specified. For the application will capture image per specified second according to the one in this spin box. Please click "OK" button to save all settings.

Then you should click "Convert" button in Figure1 and choose a directory for output image files in popup "Browse for Folder" dialog box. Then click "OK" button. In a short while, you will see your target files in the new folder. Please see Figure3.