bitrateCalc: New script

Give it target filesize and audio bitrate, and it will give you a
bitrate based on the duration of the input file.

bitrateCalc.ps1

@@ -0,0 +1,35 @@
+# User configurable with prompt
+$maxSizeInput = Read-Host -Prompt "Enter max file size in kilobytes (e.g., 8000 for 8 MB)"
+$audioBrInput = Read-Host -Prompt "Enter audio bitrate in kbit (e.g., 128 for 128 kbps)"
+
+# Remove spaces and convert to integer
+$maxSize = [int]($maxSizeInput -replace '\s', '')
+$audioBr = [int]($audioBrInput -replace '\s', '')
+
+# Rest of your script
+$video = Read-Host -Prompt "`nPlease drag&drop a video" # Drag video in
+$video = Get-ChildItem -Path ($video -replace '"', "") # Input is a string, fix it
+Clear-Host
+
+# Calc
+# 5% overhead safety 
+$safeSize = $maxSize * 0.95
+
+# Get duration of file
+$durationSec = ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$video"
+$durationSecClamp = [math]::Round($durationSec)
+
+$vidBr = $safeSize * 8 / $durationSec # size in MB * 8 = bits, divided by duration. x 1000 for kbps
+$vidBr = [math]::Round($vidBr) # int please
+$vidBr = $vidBr - $audioBr # account for audio bitrate
+
+# Format video bitrate with space as thousand delimiter
+$culture = [System.Globalization.CultureInfo]::InvariantCulture.Clone()
+$culture.NumberFormat.NumberGroupSeparator = " "
+$vidBrFormatted = "{0:N0}" -f $vidBr
+$vidBrFormatted = $vidBrFormatted -replace ",", " " # Replace comma with space if necessary
+
+Write-Host "Duration: $durationSecClamp sec" -ForegroundColor Yellow
+Write-Host "Video Bitrate (kbps): $vidBrFormatted" -ForegroundColor Yellow
+Write-Host "Audio Bitrate (kbps): $audioBr" -ForegroundColor Yellow
+pause