HarveyChang

@echo off
REM Script purpose: batch convert all .mp4 files to H.264 (libx264) and save to output\ with suffix _h264
REM Create output directory (safe if it already exists)
mkdir output
REM Loop over all mp4 files in the current directory
for %%a in (*.mp4) do (
    REM Re-encode video to H.264 with CRF 23 and medium preset; copy audio stream unchanged
    REM Input: "%%a"    Output: "output\%%~na_h264.mp4"
    ffmpeg -i "%%a" -c:v libx264 -crf 23 -preset medium -c:a copy "output\%%~na_h264.mp4"
)