How to eliminate a specific character string within a filename?

Question

I have ripped a number of DVDs for a home HTPC (plex server). Some of the file names contain unwanted characters. I want to preserve most of the original filename string but eliminate the undesired text within it. Here are some examples:

• Existing Filename Apollo 18-1.mp4, remove -1 New filename Apollo 18.mp4 Rule: within a chosen directory find all filenames ending in "-1" and eliminate the character string "-1"
• Filename ENTOURAGE_DISC1.Title1.avi, remove .Title1 New filename ENTOURAGE_DISC1.avi Rule: within a chosen directory find all filenames ending in ".Title1" and eliminate the character string ".Title1"

Answer 1

With zsh's zmv, extrapolating the requirements from those 2 examples:

autoload zmv # best in ~/.zshrc
zmv '(*)(.Title<->|-<->).(mp4|avi)' '$1.$3'

<-> is any sequence of decimal digits. (one form of <x-y> where neither boundaries are provided). If you only want .Title1 and -1 specifically and any extension, you can always change it to:

zmv '(*)(.Title|-)1(.[^.]##)' '$1$3'

[^.]## matching one or more non-dot characters.