You can use MKV to BMP Batch Converter to convert MKV to BMP in batch. It supports to set the image size and quality. If you want to convert a section of MKV to BMP in batch, MKV to BMP Batch Converter can also realize it for you.

Please download the application via clicking here for a free trial version, and buy a single-user personal license for it if you need the unlimited function of the program. For different purposes, you can also buy single-user commercial license, multi-user personal license or multi-user commercial license at the website. It is up to your needs.

The following screen snapshot is the main interface of MKV to BMP Batch Converter. You can see there is a table used to list all the MKV video files which need to be converted. The button "Add Video File(s)" on the left is used to add MKV files into the list. "Remove" button is used to delete some video file in the list. "Remove All" is for deleting all the video files. There is a "Preview Video" button below the table to preview each video file in the list. To learn some information about the application, you can click "About" button.

To set the parameters for output image files is the most important step in this batch conversion. In "Start (Sec)" and "End (Sec)" spin boxes, you can set the start and end time of videos if you want to convert a part of MKV to BMP in batch. In "Size (1 to 6000)" and "Quality: (0.01 to 255)" spin boxes, you can control the image size and quality easily. Please choose "Bitmap (*.bmp)" as output format in "File Format" combo box. The capture interval can be set in "Interval (Sec)" spin box and the application will capture one image per specified second according to the value in this spin box. Then click "OK" to save all the changes.

"Option" dialog box will close and the dialog box in Figure1 will turn to current dialog again. Please click "Convert" button to open "Browse for Folder" dialog box in which you can specify the directory for the output image files. Then click "OK" button. Please see the conversion in the screen snapshot below.