I have a bulk of files in a directory, each one with different name and different length
Kind of Physician ... Class 218 (1080p_30fps_H264-128kbit_AAC).mp4
Another type of ... Class 223 (1080p_30fps_H264-128kbit_AAC).mp4
etc
I want to sort just "Class 218" "Class 1" etc and rename those files Could you guys help me using sed ?
I would use the Perl rename script. So, in this specific case, I would capture "Class" followed by one or more spaces and one or more digits as my capture group and then rename files with that whilst retaining the same extension:
rename --dry-run 's/.*(Class\s+\d+).*/$1.mp4/' *mp4
Sample Output
'Another type of ... Class 223 (1080p_30fps_H264-128kbit_AAC).mp4' would be renamed to 'Class 223.mp4'
'Kind of Physician something Class 218 (1080p_30fps_H264-128kbit_AAC).mp4' would be renamed to 'Class 218.mp4'
If that looks good, remove the --dry-run and run again for real.
Note that in the regex:
.* means any character or digit repeated any number of times,
/s+ means any type of space (tab or space) occurring at least once and possibly more than once,
/d+ means any digit (0-9) occurring at least once and possibly more than once,
(...) means capture everything inside the parentheses,
$1 means replace with the first thing previously captured in parentheses.
