Re: setting exif metadata with ApplicationServices framework
Re: setting exif metadata with ApplicationServices framework
- Subject: Re: setting exif metadata with ApplicationServices framework
- From: "C Sandeep" <email@hidden>
- Date: Fri, 29 Feb 2008 14:20:03 -0500
Hi all,
I think I have solved this one. I wasn't setting the right type for
the destination properties, hence it wouldn't work. Subsequently I
have posted an small howto on here:
http://sandeepc.livejournal.com/656.html Hope it helps others.
- Sandeep
On Fri, Feb 22, 2008 at 3:57 PM, C Sandeep <email@hidden> wrote:
> Hi all,
>
> Recently I have been playing with adding exif data to image files on disk.
> I found this nice blog entry which shows how. However, Im not able to set
> aperture, ISO and shutter speeds from my code, here (showing literal
> values):
>
> ......
> [exifDict setValue: @"800"
> forKey:(NSString *) kCGImagePropertyExifISOSpeedRatings];
>
> [exifDict setValue: @"28/5"
> forKey: (NSString *)
> kCGImagePropertyExifApertureValue];
>
> [exifDict setValue:@"-1507/1140"
> forKey: (NSString *) kCGImagePropertyExifShutterSpeedValue];
>
> NSMutableDictionary *metaData = [NSMutableDictionary dictionary];
> [metaData setObject: exifDict forKey:(NSString
> *)kCGImagePropertyExifDictionary];
> CGImageDestinationAddImageFromSource(destination,source,0,
> (CFDictionaryRef) metaData);
> CGImageDestinationFinalize(destination);
> .....
>
> However I was able to set the kCGImagePropertyTIFFMake property. Are the
> values for these properties of the wrong format ? How does one set these
> exif meta data ? Thanks.
>
> - Sandeep
>
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