what is the 'attachment'?

[bbebe]

Hello.
Does anyone know the difference between checking and not checking the “attachment” option in the checkbox when using makemkv?

Thank you.

[Ezatoka]

It is usually a cover image, which is e.g. shown in Windows File Explorer when thumbnails are shown for video files.

[bbebe]

It is usually a cover image, which is e.g. shown in Windows File Explorer when thumbnails are shown for video files.

Once I ripped without checking 'attachment' but it looks like it has thumbnails... so I wonder
Thank you for replying

[Ezatoka]

you might have a thumbnail provider for video files, they usually just take one random frame from the video. The image file in the cover would always be the same.