Re: setting exif metadata with ApplicationServices framework

FROM : C Sandeep
DATE : Fri Feb 29 20:20:03 2008

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_removed>> 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
>