Set file timestamp from another file.

[NewBorn]

I have video files in .MKV extension, then i used batch conversion inside AviDemux to save them with .MP4 extension (not a simple rename have to change container format

But i have lost original timestamp that my camera make (Date Modified). Before i delete .MKV files i want to copy date modified to the .MP4 files, how can i do it?

I have following file structure.

c:\videos\0001.mkv
c:\videos\0002.mkv
c:\videos\0003.mkv
c:\videos\mp4\0001.mp4
c:\videos\mp4\0002.mp4
c:\videos\mp4\0003.mp4

[therube]

For an individual file, or for a few individual files, I might use something like:

SETTIME.bat:

Code: Select all

@ECHO OFF

ECHO  SETTIME  sets a file's date to the "same" file, named "abc"
ECHO  a sort of more current variation of my old ancient DOS settime program
ECHO.
ECHO  therube 02/20/2015
ECHO.
ECHO  File to change the date of:
ECHO     %1

FOR   %%i in (%1) do  SET   BASENAME=%%~dpiabc
ECHO  reference file (aka "abc"):
ECHO     "%BASENAME%"
ECHO.
ls -l %1
ls -l "%BASENAME%"
ECHO.

PAUSE

touch %1 --reference="%BASENAME%"
:: ls -l %1
c:\bin\dd.exe -1 %1

PAUSE
EXIT


Basically it sets a files "date" to that of some other file.
(In this particular case, it is a file named [hardcoded as] "abc" - though you could point to some other [variable] file instead.)
(touch, is a UNIX command to set a file date.)


Depending... instead of Avidemux, you could automate a batch file to transcode (& date).

pseudo-code:

Code: Select all

for i in videos/*.mkv
do
ffmpeg -i %i.mkv -c copy c:/videos/mp4/%1.mp4
touch c:/videos/mp4/%1.mp4 --reference %1
done


That says (for ffmpeg) to copy 0001.mkv to 0001.mp4, & (touch to) set 0001.mp4's file date to that of 0001.mkv.
(Likewise, it would do it for 0002...).


Any particular reason that you are transcoding from .mkv to .mp4?
(The only reason I would do such, is if the particular device you are playing on does not support .mkv, or if on the off chance, your device/player might happen to play mp4 "better" the mkv.)
If it is because your player does not support .mkv, get a new player .)