Removing custom video thumbnails

[Quolli]

Hi all, I basically have the exact same issue as Gerff who posted his issue here.

Problem is, I have absolutely no idea what to do with the suggested tool.

I've opened the video file using the mkvtoolnix-gui. The attachments tab shows no files, so I assumed the irritating thumbnail is encoded within the video itself.

So next I went into the Output tab and told it to split after a specific timecode which I set to 00:01:00. The video looked like it split successfully, except now both the videos have the irritating thumbnail.

I did notice that within the "Tracks, chapters, tags and attachments" box on the Input page there were 3 tags under the Codecs heading. Perhaps this is what I should be editing?

I'm pretty lost at what I need to do and would really appreciate any help (maybe an idiot-proof guide?) on fixing this. Thanks.

[roma_turok]

Adding custom cover art or thumbnail to MKV:
1)In mkvmergeGUI add mkv or mp4 video
2) go to "Attachments" tab and add image file with name cover.jpg of poster or thumbnail,
more info for specification and options for image files: http://www.matroska.org/technical/cover_art/index.html
3)Click Start muxing
There is a mkv sample file with cover art


Enabling in Windows custom thumbnail cover art:
1)install Icaros
2)enable in Icaros Use embedded cover art

[Quolli]

Thanks Roma. However, while the instructions you've posted are excellent for embedding a custom thumbnail I want to the exact opposite. I've tried to do a reversal of the steps in embedding the custom thumbnail with the sample file. The same issue persists the attachment (ie image thumbnail) does not show up within the attachment tab.

[roma_turok]

I know you wanted remove custom video thumbnails
but from you post, you failed to do this
so I posted how to add custom video thumbnail, to change current thumbnail

what version mkvtoolnix-gui you using?
what thumbnail you see in folder on downloaded MKV sample file, without change it?
I see this:

[ndjamena]

What does the 'irritating thumbnail' look like? How long have you been using MKVs and how many do you have?

[Quolli]

I know you wanted remove custom video thumbnails
but from you post, you failed to do this
so I posted how to add custom video thumbnail, to change current thumbnail

what version mkvtoolnix-gui you using?
what thumbnail you see in folder on downloaded MKV sample file, without change it?
I see this:

[Attachment 28149 - Click to enlarge]

I see the same thumbnail that you see, the one of Dexter.

I am using v7.3.0 of mkvtoolnix-gui but I am using the 64-bit version.

[roma_turok]

So you adding on you mkv file cover.jpg image, click Start muxing
and the final mkv thumbnail unchanged?

[Quolli]

So you adding on you mkv file cover.jpg image, click Start muxing
and the final mkv thumbnail unchanged?

[Attachment 28151 - Click to enlarge]

That is correct. Have I done something incorrectly? Is that why it doesn't show up?

Maybe I haven't done something correctly and completely missed it. Here are some screenshots:

[roma_turok]

Please try use mkvmerge GUI
not the mkvtoolnix-gui

[Quolli]

Please try use mkvmerge GUI
not the mkvtoolnix-gui

for test only, can you join attached files test.mkv and cover.jpg
and check if its change thumbnail

Oh I see! I was using the wrong program this entire time!

Attachments do indeed appear within the corresponding tab and once disabled do show the default thumbnail (which is what I wanted).

Thank you so much for help these past few days (and sorry for my ineptitude)!