<#
.SYNOPSIS
    Gets the total frame count of a video file using ffprobe.
.PARAMETER Video
    Path to the input video file. Can be absolute or relative to current directory.
.DESCRIPTION
    Gets the total frame count of a video file using ffprobe.
#>
param(
    [Parameter(Mandatory = $true)]
    [string]$Video
)

Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

$VideoPath = $Video

if (-not (Test-Path $VideoPath)) {
    Write-Error ('Video file not found: {0}' -f $VideoPath)
    exit 1
}

$PSNativeCommandUseErrorActionPreference = $false

$totalFrames = & ffprobe -v error -select_streams v:0 -count_frames -show_entries stream=nb_read_frames -of csv=p=0 $VideoPath 2>&1 | Select-Object -First 1

if (-not $totalFrames -or $totalFrames -notmatch '^\d+$') {
    Write-Error ('Could not determine frame count for: {0}' -f $VideoPath)
    exit 1
}

Write-Host ('Total frames: {0}' -f $totalFrames)