Renaming files by reformatting existing filenames - placeholders in replacement strings used with the -replace operator

Question

I have a few video file like this: VideoName_s01e01.mp4 where the season and episodes are variables. I want to add an underscore (\"_\") between the s??

Answer 1

regex is the better solution, i propose other with formating number and use Template

$exampleoffile = @"
namev1_s01e01.mp4
namvev2_s03e02.mp4
VideoName_s20e15.mp4
VideoName_s15e1.mp4
VideoName_s1e16.avi
VideoName_s1e23.mv
"@

$template=@"
{file*:{prefix:Test1}_s{season:01}e{episode:01}{extension:.mp4}}
{file*:{prefix:1xxx}_s{season:100}e{episode:5}{extension:.mp4}}
{file*:{prefix:yyy3}_s{season:10}e{episode:02}{extension:.havi}}
"@



$exampleoffile | ConvertFrom-String -TemplateContent $template | 
% { "{0}_{1:D2}_e{2:D2}{3}" -f $_.file.prefix, [int]$_.file.season, [int]$_.file.episode, $_.file.extension }