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Forum Topic - How to access EXIF tags?:

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Mate Szarvas(deleted)

07/06/2009 6:18 AM

post33146

The "QNX Aviage Multimedia Suite" summary http://www.qnx.com/products/middleware/multimedia.html
indicates that the MME has support for EXIF v2: JPEG (EXIF) tags.

How to access these tags via the MME API?

Does this support cover GPS tags as well?

Thanks,

--
Mate

Dan Cardamore(deleted)

07/06/2009 8:29 AM

post33157

Re: How to access EXIF tags?

Hi Mate,

EXIF is something that we used to support but due to licensing issues with the initial implementation it was pulled.  MM
 1.x does not support EXIF parsing.

We can extract images and indicate their resolution, etc.  But information such as caption, GPS, etc are not available.

This is something we've wanted to put back in, but there hasn't been customer demand.

Mate Szarvas(deleted)

07/07/2009 2:22 AM

post33234

Re: How to access EXIF tags?

Thanks Dan, I understand regarding GPS tags.

You mention that you can indicate "resolution, etc."
That's also something we were looking for but could
not find the relevant entries in the tables.

Could you advise where to look for this information?

Thanks,

--
Mate

Dan Cardamore(deleted)

07/07/2009 12:37 PM

post33309

Re: How to access EXIF tags?

See the mme_metadata_* APIs.  You can get an XML document back from mme_metadata_getinfo_* that returns what information
 is available about images.  Alternatively, you can also use the AGTDK.

Mate Szarvas(deleted)

07/08/2009 7:14 AM

post33372

Re: How to access EXIF tags?

Thanks Dan.

Have not been aware that these functions can
also be called for files of ftype=4 (photo) and
thought that this metadata could be synchronized
into the library, just like for audio.

Thanks again!

--
Mate

Nicola Vulpe(deleted)

07/08/2009 10:54 AM

post33399

Re: How to access EXIF tags?

Hi Mate, Have you had a look at the chapter "Metadata and Artwork" in the MME Developer's Guide? If you find things that
 need to be better explained, please let me know.

Mate Szarvas(deleted)

07/10/2009 5:38 AM

post33513

Re: How to access EXIF tags?

Hello Nicola! I've used this chapter in the past when
implementing album art retrieval and all went fine.

As my (wrong) assumption was that these metadata
functions work only for audio files, I have not looked
at the chapter when working with image data.

Will check it later and let you know if something
is not clear.

Thanks,

--
Mate

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