How to add thumbnail image displayed for MKV files?

[gringott]

I would like to be able to "insert" a title page for videos that is displayed in thumbnail view. I have seen this in some iTunes videos. I have been unsuccessful in many attempts. I usually have mkv videos, so this would be the main container I am working with. Thanks for your help and or guidance.

[ndjamena]

http://www.matroska.org/technical/cover_art/index.html

Use MKVPropEdit.

[gringott]

I have tried that numerous times and windows does not display that attached picture as a thumbnail. Hence my question.

[dotz]

Got it:

-download MKVtoolnix GUIhttps://www.videohelp.com/software/MKVtoolnix
-drag .mkv file into multiplexer
-attachments folders
-drag in cover art **Must be labelled "Cover Art.jpg"**
-start multiplexing

BOOM!

[ndjamena]

?

OR

Drag mkv file into header editor, go to attachments, add attachments, select the image then change 'file name' to 'cover.jpg'.

The only possible problem that may cause is if certain demuxers can't follow the modified pointers properly which will make some of the headers invisible to it.

-edit- BOOM!