Subtitle and Audio language is not recognizable after convertion

[Pete4K]

When the original file has subtitles and audio (for example choose between japanese, english and german), it's impossible to recognize the chooseable language with the video player, because Audio-Files are only named (f.e. eac3, 48.000 Hz,...) and Subtitle-Files (ass,...). Maybe you can place a command, which results in the old filename for such files.