: If you prefer using terminal commands, you can attach an image without re-encoding the video: ffmpeg -i ThaiHauCheonChu_13.mkv -c copy -attach cover.jpg -metadata:s:t mimetype=image/jpeg ThaiHauCheonChu_13_with_cover.mkv How to View the Cover Art
Open and add your ThaiHauCheonChu_13.mkv file. Go to the Attachments tab. Download File ThaiHauCheonChu_13.mkv
: This is the industry-standard free tool for managing MKV files. : If you prefer using terminal commands, you