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Export originals incl. IPTC info

Marco M. Jaeger
Hello
I was wondering whether there is a way to export originals and writing keywords (metadata) to the file - I also tried a regular export incl. metadata at 100% quality - interestingly the file size increases from e.g. 29.9mb to 33.9mb and I was wondering why - hope somebody can help out.

Thanks
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  • SFA
    [quote="mmjaeger" wrote:
    Hello
    I was wondering whether there is a way to export originals and writing keywords (metadata) to the file - I also tried a regular export incl. metadata at 100% quality - interestingly the file size increases from e.g. 29.9mb to 33.9mb and I was wondering why - hope somebody can help out.

    Thanks


    I'm not entirely clear about what you are doing re but if you are sending the original file somewhere else then no, you cannot write additional EXIF or IPTC data to the file from C1. As a principle C1 will never amend the original file in any way.

    As for your regular export - to what sort of file did you export and from what sort of file (RAW, TIF, JPG?) and with what settings applied?


    Grant
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  • Marco M. Jaeger
    @Grant - Apple Aperture allows to add the IPTC data to the original file, that's why I was asking - I was just trying to apply my keywords to a plain jpeg file - exporting those jpegs at a 100% original size end up at least 10% larger and I was wondering why and how to prevent this.
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  • SFA
    [quote="mmjaeger" wrote:
    @Grant - Apple Aperture allows to add the IPTC data to the original file, that's why I was asking - I was just trying to apply my keywords to a plain jpeg file - exporting those jpegs at a 100% original size end up at least 10% larger and I was wondering why and how to prevent this.


    You can include or exclude the Keywords on output as part of the Output recipe instructions.

    As for file size - jpg files vary out of camera depending on many factors including compression mechanisms, level of "detail" in the image and so on.

    If you have made changes to the file and perhaps increased the number of colours or broken up blocks of colour or added extra sharpening ... etc., etc. - the amount of data to be stored may be increased BUT, more importantly, the compression algorithms like to work with the largest possible "blocks" of data. For example a large block of colour can be compressed into a colour, some dimensions to define the size of the block and positional information. If you, for the sake of illustration, break that into 4 equal sections by adding some subtle colour changes you will need 4 data records rather than one (in simple terms) to describe the new version. So if you have added data, kept the same number of pixels for the dimensions and retained the 100% Quality setting the file will increase in size.

    If you work with a lower quality setting the file size will reduce significantly. Likewise if you apply certain types of processing that in effect reduces the number of colours and the detail in the image the size may reduce very noticeably.

    There are other factors too but this is not the place to attempt to cover them.

    If you are going to print or project very large versions of the files then 100% quality might be useful but if your main use will be smaller prints or on screen then the quality setting can likely be reduced without causing any sort of problem - assuming the file size is of any real significance anyway. For some people it is, others not so much.


    HTH.


    Grant
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  • Marco M. Jaeger
    hello Grant
    Thanks for your detailed reply - I've not done any modification to the files at all other than added some keywords - the jpegs are actually kind of my raw files - exporting them in original size at 100% I would expect them to add maybe 2K for the keywords but not 10% or more of the original file size which is somewhere between 20 and 30MB
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  • SFA
    [quote="mmjaeger" wrote:
    hello Grant
    Thanks for your detailed reply - I've not done any modification to the files at all other than added some keywords - the jpegs are actually kind of my raw files - exporting them in original size at 100% I would expect them to add maybe 2K for the keywords but not 10% or more of the original file size which is somewhere between 20 and 30MB


    It probably depends more on how the file system is reporting the file sizes in that case.

    If you have exported them to get a version with keywords embedded than some sort of processing will likely have taken place, beyond the keywords addition.


    Grant
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