Emby wont read thumbnail from MKV file with webp format

[scegg 12]

Emby: 4.9.1.80 in docker x64

Issue: for all video files in MKV format, when built-in thumbnail is saved in image/webp format, Emby won't read it.

[Luke 42077]

Hi there, what makes you think Emby won't read it?

[scegg 12]

8 hours ago, Luke said:

Hi there, what makes you think Emby won't read it?

Emby generates and shows a snapshot of this video instead of the embedded cover as icon. 

[Luke 42077]

What does the media info show at the bottom of the web app detail screen?

[scegg 12]

1 hour ago, Luke said:

What does the media info show at the bottom of the web app detail screen?

[scegg 12]

This file was generated by yt-dlp from youtube.

[Luke 42077]

OK we'll take a look at it. Thanks.

[scegg 12]

2 minutes ago, Luke said:

OK we'll take a look at it. Thanks.

I can attach a smaller file generated from a shorter youtube video for testing.

[Luke 42077]

3 minutes ago, scegg said:

I can attach a smaller file generated from a shorter youtube video for testing.

I've found the issue, thanks.