Convert video From swf to mkv

An SWF file is an animation that may contain text, vector and raster graphics, and interactive content written in ActionScript. It is saved in the Adobe Flash format, which Adobe discontinued on December 31, 2020. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.

MKV file extension is a Matroska Video file. It's a video container much like MOV and AVI, but also supports an unlimited number of audio, picture, and subtitle tracks (like SRT or USF).