wget convert a file depending on the ending during download

Question

I am using windows latest wget. I would like to automatically convert a webm video file into a mp4 video file. I don't want to mess with VLC and without that I'm not sure where to start

Answer 1

I would like to automatically convert a video file into a readable video format for my raspberry pi (.webm to.mp4)

wget can not do that, from GNU Package blurbs

GNU Wget is a non-interactive tool for fetching files using the HTTP, HTTPS and FTP protocols. It can resume interrupted downloads, use file name wild cards, supports proxies and cookies, and it can convert absolute links in downloaded documents to relative links.

there is not hint of ability to convert between different file formats.

My raspberry pi can't read.webm files for some reason

Then I think you should at least detect objective reason for this circumstance. If this problem has easy solution, then applying it would eliminate need for conversion. I suggest trying Raspberry Pi Stack Exchange

I would rather not mess with VLC

Then use tool which can do video transcoding , I suggest giving a try HandBrake as it is free, multiplatform and support numerous formats.