1. Run Convert Multiple FLV Files To MPEG or AVI Files Software.
2. Click the "Add FLV File(s)" button to add files. Then an open file dialog will appear, hold CTRL or SHIFT key to select multiple files. To add all files in a folder, click "Add All FLV Files in Folder" then select a folder.
3. Select convertion type to MPEG or AVI.
4. To start converting the selected files, click the "Start" button.