title: ffmpeg keep original file date?
body: <p>I use this batch to cut off the beginning 6 seconds of a bunch of mp4 files,creating new files, in Win7. It works great, but the output files' date is new. How do I keep original date? But I don't want to re-encode mp4 files, just too many of them, too slow. Appreciate any response.</p>
  
  <p>for %%a in ("*.mp4") do ffmpeg -i "%%a" -ss 6 -vcodec copy -acodec copy "newfiles\%%~na.mp4"</p>