Manipulating file dates

[Renata Rocha]

On Sat, Mar 27, 2010 at 15:03, Giles Orr <gilesorr-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
> I'll shortly be boarding a flight back to Toronto, at which time I'll
> have about a thousand photos with the wrong time stamp on them (I
> never remember to reset the camera until about five days have passed).
>  All the photos have a Toronto time stamp on them, when what I need is
> six hours later.  I admit I'm sitting at a Windows computer in a hotel
> and haven't attempted to research this myself, but I've looked at it
> in the past and the process was a bit confusing.  As I recall, I would
> need to get the time from the file, convert to seconds since the
> computer epoch (some time in 1969?, although I think that's immaterial
> in this context?), add 6*60*60 seconds, then convert back to date
> format.  Looping through the files with touch is no problem, but help
> with the date manipulation under Bash would be much appreciated.

I'm pretty sure you won't need to change the files' date, but the jpg
headers info.

There's a command line tool named "exif" (self-describing)  which
deals with exif headers. May be useful for what you need.

-- 
Renata Rocha
re-9siASaY8nq0dnm+yROfE0A at public.gmane.org
http://www.linkedin.com/in/renatarocha
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