Add a period at nth position from the last for multiple files in a folder

Question

While doing bulk renaming mistakenly I removed periods from extensions of many of my files and also it duplicated the extensions in every file

Now I would like to add them back

My Files look like this now

A Nightmare On Elm Street 720p Bluray X264-Pahe In mkv mkv
Austin Powers International Man Of Mystery 480p Bluray 300mb-Pahe In mkv mkv
Death_warrant_1990_720p_bluray_x264_750mb-Pahe In mkv mkv
Die Frau Des Polizisten 720p Bluray X264-Pahe In mkv mkv

So What I would like to do is remove the extra extension part, as well as add a period just before the extension so that it will look like a video file

That is..once I rename it should look like below

A Nightmare On Elm Street 720p Bluray X264-Pahe In.mkv
Austin Powers International Man Of Mystery 480p Bluray 300mb-Pahe In.mkv
Death_warrant_1990_720p_bluray_x264_750mb-Pahe In.mkv
Die Frau Des Polizisten 720p Bluray X264-Pahe In.mkv

Is there any regex that I could use? or can I use perl rename technique with regex to do so?

You should use linux command [rename](https://man7.org/linux/man-pages/man1/rename.1.html) for this purpose. — Polar Bear, Nov 10 '20 at 03:53

score 0 · Accepted Answer · answered Nov 10 '20 at 01:33

0

You can try:

s/^(.*) (\w\w\w) (\2)$/\1.\3/

Demo 1

Or, this works too:

s/ (\w\w\w) (\1)$/.\1/

Demo 2

answered Nov 10 '20 at 01:33

dawg

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That worked well Thank you – roshan Nov 10 '20 at 02:38

Add a period at nth position from the last for multiple files in a folder

1 Answers1