This code is used in PowerShell to determine the duration...

This code is used in PowerShell to determine the duration of a media file and format the duration into a human-readable time format (hours, minutes, seconds). Below is a breakdown of what it does:

1. Retrieve the Duration:

   $durationSec = & ffprobe -v error -show_entries format=duration `
       -of default=noprint_wrappers=1:nokey=1 "$filePath" 2>$null
   

   • This runs the ffprobe command (a tool from FFmpeg) to extract the duration of the media file specified by $filePath.
   • -v error: Suppresses unnecessary output (only errors will be shown).
   • -show_entries format=duration: Specifies that only the duration of the media file should be retrieved.
   • -of default=noprint_wrappers=1:nokey=1: Formats the output to display only the value (no extra labels or wrappers).
   • 2>$null: Redirects error output to null, effectively hiding any errors.

   The result is stored in $durationSec, which will contain the duration of the media file in seconds (as a numeric value).

2. Convert Duration to a TimeSpan:

   $durationTimeSpan = [TimeSpan]::FromSeconds([double]$durationSec)
   

   • The numeric duration (in seconds) stored in $durationSec is cast to a double and converted to a .NET TimeSpan object using [TimeSpan]::FromSeconds().
   • A TimeSpan object represents a duration as a combination of hours, minutes, seconds, and other time components.

3. Format the Duration:

   $durationFormatted = $durationTimeSpan.ToString("hh\\:mm\\:ss")
   

   • The TimeSpan object $durationTimeSpan is formatted as a string in hh:mm:ss format (hours:minutes:seconds) using the ToString method.
   • The double backslashes \\ ensure the colons : are treated as literal characters in the format string.

4. Result:

   • The $durationFormatted variable contains the media file's duration in hh:mm:ss format, suitable for display or further processing.

Example:

If the media file is 90 seconds long:

• $durationSec will be 90.0.
• $durationTimeSpan will represent a duration of 00:01:30.
• $durationFormatted will be "00:01:30".