images to mkv and webp by using ffmpeg into a .bat file

[maudit]

Hi, I have a folder with many subfolders that contains jpg sequence files.
Runnig these 2 commands into the PS, I can generate both mkv and webp.

ffmpeg -i 'image_%06d.jpg' -c:v libx264 -r 24 .output.mkv
ffmpeg -i 'image_%06d.jpg' -c:v libwebp_anim -r 24 .output.webp

I wanna copy these uniques commands in 2 separate .bat files, copy them in each folder and run them whenever i want.

the problem is that it seems I cant use the "%06d" part into a .bat file.
any alternative solution? please,any help?
the best would be a single location for those .bat that they can search into every subfolder, but I think it would need quite complicated script.

maybe using an avs script?
how fo I load images sequences into avspmod?

for example this line below works but how do I let it to read all the images till the end?
I mean if there are 400 files in the folder, it must read them all, and do not create extra blank frames.

ImageSource("E:\image_%06d.jpg",start=1)

[jack_666]

try using image_%%06d.jpg

[maudit]

Error opening input: No such file or directory