Name the attachment cover.jpg or small_cover.jpg for best compatibility with players.

Open and add your ThaiHauCheonChu_13.mkv file. Go to the Attachments tab.

: 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

: High-quality players like VLC Media Player or MPV will typically recognize and display the embedded cover art during playback or in their library views. Security Warning

: This is the industry-standard free tool for managing MKV files.

: Windows File Explorer does not natively display embedded MKV thumbnails. You can use Icaros to enable thumbnail previews for MKV cover art.

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