Re: How to change internal Exif "creation time" NOT to UTC timestamp but to MEZ/MESZ in MP4 video?
On Sat, 18 Jul 2020, Ben via ffmpeg-user wrote:
> Ok, I can change the internal EXIF Metadata "Creation time" of an MP4 video
> with the following command:
> ffmpeg -i input.mp4 -c copy -map 0 -metadata creation_time="2020-04-19
> 11:30:00" output.mp4
> It works.
> However the date is interpreted as UTC time zone value.
No, it is interpreted as local time.
> Since I the videos are taken in the timezone MEZ resp. MESZ (summer time) the
> timestamp does not reflect the real time of recording.
> Ok, I could manually investigate if at the time of recording it was summer
> time or not and add 1 or 2 hours to the command timestamp value.
> But this inconvenient and tedious on the long run.
> Isn't there a way to tell ffmpeg:
> "Hey ffmpeg, this is the UTC time. Put AUTOMATICALLY the MEZ zone time
> (winter time) or MESZ zone time (Summer time) in EXIF header"
You should be able to specify the UTC offset as specified in ISO-8601.