Videos previews webp

[ZAIAC001 6]

Hi

Is there any way to configure previews generator?

For now every video parsed by ffmpeg and take one pucture from undefined place of video duration

I would like to have a way to change it on webp generator 

Generator itself should take few images from video on different places and make one webp animation

Emby already can use such webp files but not generate

 

PS

Now I have .ps1 script that generate such previews

And if I place that previews next to video it works as I needed

But I should run it manually

And i would like to store previews in meta folder, not next to videos

Otherwise my vids library becomes very trashy

 

PS2 

Is there a way to move previews to meta from vids folders?

Manual generate is not such bad as trashy library with previews
 

[ZAIAC001 6]

Oh forgot: Library content type - Home videos and photos

But will be great if option appear on any type in library settings

[Luke 42325]

Hi, there is no such generator built-in, although it's not a bad idea.

[ZAIAC001 6]

And could you help with another question:
What limitations applied to previews?
I have horizontal and vertical vids
Generate webp for them and horizontal works but not vertical
 

By inspecting html code with chrome dev tools found that it limits width and height
But what exactly dont know
For new webp Ive used for normal size grid 300x150
Now it works

But mb size limited too or width and height may be bigger

Could you provide me that info please

PS 
Could you also provide me steps to clean image cache for library not for all emby server
Now I have few libraries and not want to reload already done 
Cos there many tv series and it loads very long

PS2
If interested for such new functional
I have such settings 
(will be grate if can be edited for library separately)
$WebPQuality         = 80
$ThumbWidth         = 300
$ThumbHeight       = 150
$StepPercent         = 10
$SlideDuration       = 2.0  

step 1 extract frames with ffmpeg using step (0%, 10%, 20% ... 100%)
step 2 join frames and make single wepb with extracted steps and duration
Attached my ps1 file if you needed

previews_generate.ps1