Fix for HEVC rec.709 MKV files for streaming on Roku via Plex

@echo on
setlocal enabledelayedexpansion

rem Set the directory containing the files
set "input_directory=C:\Video"

rem Loop through each file in the directory
for %%F in ("%input_directory%\*.mkv") do (
    rem Extract file name and extension
    set "filename=%%~nF"
    set "extension=%%~xF"

    rem Check if the file name already contains "-ac3" at the end
    set "excludeFile="
    echo !filename! | find /i "-ac3" > nul && set excludeFile=1

    if not defined excludeFile (
        rem Copy over all video (c:v copy) and subtitles (-scodec copy), and copy over all audio streams (-map 0), converting from AAC to AC3 (-c:a ac3)
        rem Plex will attempt to reencode AAC to AC3 and will add back in header color info that will cause the oversaturation issue
        ffmpeg -i "!input_directory!\!filename!!extension!" -flags +global_header -movflags faststart -c:v copy -c:a ac3 -map 0 -scodec copy "!input_directory!\!filename!-ac3!extension!"

        rem Strip header color information
        mkvpropedit "!input_directory!\!filename!-ac3!extension!" --edit track:v1 --delete colour-primaries --delete colour-range --delete colour-matrix-coefficients --delete colour-transfer-characteristics --delete chroma-siting-horizontal --delete chroma-siting-vertical
    )
)

echo All operations completed.
pause