ffmpeg and PowerShell - trim video with text file

Question

I have a folder with a lot of videos that need to be trimmed at the beginning and I also have a text file with the time where the video must start:

• Video_001.mxf
• Video_001.txt
• Video_002.mxf
• Video_002.txt
• Video_003.mxf
• Video_003.txt
• etc.

I can do this for one file and it works:

$start = Get-Content Video_001.txt
ffmpeg -ss $start -i Video_001.mxf -c:v copy -c:a copy ./Trim_Video_001.mxf

As there are like 200 videos within the folder, I'm trying to do this:

$files = get-childitem *.mxf
$time = get-childitem *.txt

$time | foreach-object {
    $timename = $_.name
}

$files | foreach-object {
    $filename = $_.name
    $start = Get-Content $timename
    ffmpeg -ss $start -i $filename -c:v copy -c:a copy ./'Trim_'$filename
}

But it trims all the videos with the time in the last text file. How can I fix the code so the mxf file takes its corresponding txt file?

I'm not a programmer, I'm a video editor so I'm kind of newbie on this matter :)

Thanks!

Answer 1

If there is a text file for each video with the same name, something like this should work from the command line. First enter the path where the videos are from the command line and than use this command:

for %a in (*.mxf) do @for /f "delims=" %b in ('type "%~na.txt"') do ffmpeg -ss %b -i "%a" -c:v copy -c:a copy "Trim_%~a"