Batch search and replace file path

Question

So I've got lots of m3u playlists created on my Windows machine inside a folder with file paths to tracks as:

D:\path-of-mp3

So first I want to replace all the \ with / and then D: with /media/etcetc inside the playlist. How do I do that using sed or some other tool to every playlist in folder?

I'm on Linux Mint.

Answer 1

sed -i".old" 's|\|/|g; s|^D:/|/media/etcetc/|' *.m3u