[FFmpeg-user] How to keep the original creation date?

[Kevin Willard]

 Thanks for your effortKevin
    On Thursday, June 22, 2023 at 01:19:01 PM EDT, Michael Koch <astroelectronic at t-online.de> wrote:  
 
 Am 22.06.2023 um 18:06 schrieb Michael Koch:
> Am 22.06.2023 um 16:36 schrieb Kevin Willard via ffmpeg-user:
>> I've got 3000 family videos from 2009-2014 that played perfect back 
>> then on Windows 7 but have the wrong aspect ratio today (all 
>> stretched even though it says it is 1920X1080). The code belowfixes 
>> the problem, but changes all the dates to current. It would be nice 
>> to have the original time/date stamp for sorting and looking at the 
>> family timeline.Google search brings me to Stackoverflow (ffmpeg keep 
>> original file date?) They us PowerShell, I don't know how to use it 
>> and I don't think it will work because in the example the PS 
>> operation is done after the FFmpeg conversion is done. FFmpeg in the 
>> copy sets the creation time, last modified, and last access to the 
>> time/date the FFmpeg was run.
>> The code below is in a .bat file located in the directory that 
>> contains the 3000 *.MP4 files. When run
>> it puts the corrected files in the subdirectory Fixed_Directory.
>> for %%a in ("*.mp4") do ffmpeg -i "%%a" -aspect 1920:1080 -c copy 
>> "Fixed_Directory\%%~na.mp4"
>>
>> With all the switches I would think there would be one to keep the 
>> original dates, any ideas?
>
> Which FFmpeg version are you using? In my test the creation time is 
> almost kept as it was, it's only changed by a few minutes. I don'*t 
> know why.

What I wrote was wrong. It keeps the creation date of the output file, 
if that file did already exist.
Sorry, I have no idea how to keep the creation date of the input file.
-map_metadata 0 does also not work in this case.

Michael

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