ffmpeg - Convert files but keep Same Date Modification as Original?-CodePudding

So I want to start with that ffmpeg and powershell isn't really my strength but I have been using the following powershell command to convert every .flac file in a certain directory to a 320K file.

dir *.flac | foreach {ffmpeg -i $_.FullName -c:v copy  -b:a 320k  $_.FullName.Replace('flac', 'mp3')}

This works exactly how I want to without any album art being transcoded but I want to incorporate a way so that the new .mp3 files that are created have the SAME DATE MODIFICATION value of the .flac files. Is something like this even possible?

audio_ex.flac = Date Modification: 1/1/2010
audio_ex.mp3 = Date Modification: 9/8/2021

should be instead

audio_ex.flac = Date Modification: 1/1/2010
audio_ex.mp3 = Date Modification: 1/1/2010

I have a folder of 6K files and want each original date modified to match the newly created files so if I can do the above command and also have the date mod time match within one execution, that would be ideal.

I thought of manually changing each files mod time using 3rd party tools but it will be too time consuming.

CodePudding user response：

Try the following (note that aliases were expanded to their underlying cmdlet names):

Get-ChildItem -Filter *.flac | ForEach-Object {
  $outFile = $_.FullName -replace '\.flac$', '.mp3'
  ffmpeg -i $_.FullName -c:v copy -b:a 320k $outFile
  (Get-Item -LiteralPath $outFile).LastWriteTime = $_.LastWriteTime
}