reading jpeg metadata from commandline

[congo]

hi everyone,

does either of you know a way in which i can read a jpeg or gif or maybe even movie files metadata from synology commandline? -i saw exiftool for linux, yet ipkg doesnt know this one for synology ppc....

hope someone can help



regards
Thomas

[bzhou]

You can try imagemagick ipk

[congo]

hi there,

thanks for your reply,

so i grapped imagemagic - compiled ok. Yet howto use this is less obvious. I found a binary called "display", yet that doesnt react to any of my inputs...

BR,
congo

[bzhou]

Code: Select all

/opt/bin/ipkg files | grep ^/opt/bin/ | sort -u
/opt/bin/identify file-name.jpg
/opt/bin/man identify # if you have "man" installed


[congo]

excellent - i can use the identify binary, yet it reveals no information of when the picture was created initially. It does reveal the following:

Code: Select all

hardware001.jpg JPEG 2592x1944 2592x1944+0+0 8-bit DirectClass 828kb 4.070u 0:09

-for pictures taken with a digicam its often known as "picture taken datetime".

regards
congo

[bzhou]

identify -verbose picture.jpg

[congo]

identify -verbose picture.jpg

Thanks - this is awesome!, i get a great list of data for each picture. Though i estimated my nearly 8 gigs of jpegs would take somewhat a week to walk over by a script i would do, as the verbose-option is quite slow (on DS-106e)...

Would you happen to know if i can call identify with a param that will return only the created-datetime tag?


mahlo,


regards
congo

[bzhou]

Yeah, the verbose mode is pretty slow.

Ideally one would port some libexif client to optware, I just don't have the time right now.