Convert PySceneDetectCSV

Convert-PySceneDetectCSV.ps1

<#
.SYNOPSIS
Convert PySceneDetect output CSV file to something that can be embedded in MKV or MP4
.EXAMPLE
Frst create scenes file using PySceneDetect
"%~dp0tools\software\PySceneDetect\scenedetect.exe" -i "%input%" -s "%output_dir%\my_video.stats.csv" --min-scene-len 1s --merge-last-scene list-scenes -s -o "%output_dir%" detect-adaptive --threshold 7 --frame-window 100 save-images -o "%output_dir%" export-html
Then convert CSV to file format supported by ffmpeg or mp4box

for ffmpeg:
powershell.exe -NonInteractive -ExecutionPolicy ByPass -File "%~dp0Convert-PySceneDetectCSV.ps1" -InputFile "%~dp0output_scenedetect\%filename%-Scenes.csv" -OutputFile "%~dp0output_scenedetect\%filename%-Scenes.ffmetadata.txt" -OutputType "ffmetadata"
"%~dp0tools\software\ffmpeg\FFmpeg\ffmpeg.exe" -loglevel error -hide_banner -nostdin -i "%~dp0output_nvenc\%filename%.%output_ext%" -f ffmetadata -i "%~dp0output_scenedetect\%filename%-Scenes.ffmetadata.txt" -map_metadata 1 -map_chapters 1 -c copy -y "%~dp0output_nvenc\%filename%_2.%output_ext%"

for mp4box
powershell.exe -NonInteractive -ExecutionPolicy ByPass -File "%~dp0Convert-PySceneDetectCSV.ps1" -InputFile "%~dp0output_scenedetect\%filename%-Scenes.csv" -OutputFile "%~dp0output_scenedetect\%filename%-Scenes.nerochap.txt" -OutputType "nero-vorbis-txt"
"%~dp0tools\software\GPAC\mp4box.exe" -add "%~dp0output_scenedetect\%filename%-Scenes.nerochap.txt:chap" "%~dp0output_nvenc\%filename%.%output_ext%"
#>

[CmdletBinding()]
param(
    [Parameter(Mandatory=$True)]
    [ValidateNotNullOrEmpty()]
    [string]$InputFile,

    [Parameter(Mandatory)]
    [ValidateNotNullOrEmpty()]
    [string]$OutputFile,

    # ffmpeg metadata https://ffmpeg.org/ffmpeg-formats.html#Metadata-1
    # nero,apple,matroska examples https://github.com/rigaya/NVEnc/blob/master/NVEncC_Options.en.md#--chapter-string
    # chapter metadata in detail for audio https://github.com/Zeugma440/atldotnet/wiki/Focus-on-Chapter-metadata
    [ValidateSet('ffmetadata','nero-vorbis-txt')]
    [string]$OutputType = "ffmetadata"

)

# import PySceneDetect CSV file
$chapters = Import-Csv -Path $InputFile

# create empty output txt file
Set-Content -Path $OutputFile -Value '' -NoNewline -Force

# write header if needed for file format
switch ($OutputType)
{
    "ffmetadata" { Add-Content -Path $OutputFile -Value ';FFMETADATA1' }
}

# write chapters
foreach ($c in $chapters) {
    Write-Verbose $c 
    ## @{Scene Number=1; Start Frame=1; Start Timecode=00:00:00.000; Start Time (seconds)=0.000; End Frame=458; End Timecode=00:00:18.320; End Time (seconds)=18.320; Length (frames)=458; Length (timecode)=00:00:18.320; Length (seconds)=18.320}
    # Write-Host $c.'Scene Number'

    switch ($OutputType) {
        "nero-vorbis-txt" {  
<#
CHAPTER001=00:00:00.000
CHAPTER001NAME=Chapter 1
CHAPTER002=00:05:00.000
CHAPTER002NAME=Chapter 2
#>
            Add-Content -Path $OutputFile -Value @"
CHAPTER$('{0:d2}' -f [int]$c.'Scene Number')=$($c.'Start Timecode')
CHAPTER$('{0:d2}' -f [int]$c.'Scene Number')NAME=Chapter $($c.'Scene Number')
"@

        }

        "ffmetadata" {
<#
https://ffmpeg.org/ffmpeg-formats.html#Metadata-1
[CHAPTER]
TIMEBASE=1/1000
START=0
#chapter ends at 0:01:00
END=60000
title=chapter \#1
#>
            Add-Content -Path $OutputFile -Value @"

[CHAPTER]
TIMEBASE=1/1000
# Chapter $('{0:d2}' -f [int]$c.'Scene Number') starts at $($c.'Start Timecode')
START=$( [int]$c.'Start Time (seconds)' * 1000 )
# Chapter $('{0:d2}' -f [int]$c.'Scene Number') ends at $($c.'End Timecode')
END=$( [int]$c.'End Time (seconds)' * 1000 )
title=CHAPTER $('{0:d2}' -f [int]$c.'Scene Number')
"@
        }
    }

}

# Done