drop your .m3u8 files into this cmd in your windows explorer

m3u8_to_mp4.cmd

@echo off
setlocal
rem -----------------------------------------------------------------------------
rem  m3u8_to_mp4.cmd - Converts a file using FFmpeg. (Verbose Debug Version)
rem
rem  This script provides detailed feedback on each step of the process
rem  to help troubleshoot any issues.
rem -----------------------------------------------------------------------------

echo.
echo [DEBUG] Script starting...
echo.

rem --- 1. Check if an argument was provided ---
if "%~1"=="" (
    echo [ERROR] No input file specified. The script needs a file to work on.
    echo.
    echo [USAGE] Drag and drop your .m3u8 file onto this script icon,
    echo         or run from the command line like this:
    echo         %~n0 "C:\path\to\your file.m3u8"
    echo.
    goto :End
)

echo [INFO] Raw argument received: "%~1"
echo.

rem --- 2. Check if the provided input file actually exists ---
if not exist "%~1" (
    echo [ERROR] The input file could not be found at the path you provided.
    echo [CHECK] Please verify the path and filename are correct.
    echo [PATH]  "%~1"
    echo.
    goto :End
)

rem --- 3. Determine full input and output file paths ---
rem %~1   - The full path of the file provided (e.g., C:\videos\intro.m3u8)
rem %~dp1 - The Drive and Path of the file (e.g., C:\videos\)
rem %~n1  - The Name of the file ONLY (e.g., intro)
set "INPUT_FILE=%~1"
set "OUTPUT_FILE=%~dp1%~n1.mp4"

echo ======================================================
echo  Preparing FFmpeg Conversion
echo ======================================================
echo.
echo [INFO] Input file has been identified as:
echo        "%INPUT_FILE%"
echo.
echo [INFO] Output file will be saved to the same folder as:
echo        "%OUTPUT_FILE%"
echo.
echo ======================================================
echo.
echo [ACTION] The following command will now be executed:
echo ------------------------------------------------------
echo ffmpeg -protocol_whitelist file,http,https,tcp,tls,crypto -i "%INPUT_FILE%" -c copy "%OUTPUT_FILE%"
echo ------------------------------------------------------
echo.

rem --- 4. Execute the FFmpeg command ---
ffmpeg -protocol_whitelist file,http,https,tcp,tls,crypto -i "%INPUT_FILE%" -c copy "%OUTPUT_FILE%"

echo.
echo ======================================================
echo  Conversion process finished.
echo ======================================================
echo.

:End
echo Press any key to close this window.
pause >nul

https://kampar.wordpress.com/2025/09/09/windows-batch-file-to-download-online-m3u8-files-into-mp4/