GFS Posted January 5, 2016 Share Posted January 5, 2016 When I open a tiff in AP and subsequently output to tiff via either Save or Export, the file size has significantly reduced - in this case 600Mb becomes 320Mb. Saving to .afphoto also reduces to the same size. The dimensions are unaltered. Can someone explain to me what's happening? Quote Grumpy, but faithful (watch out all you cats) Link to comment Share on other sites More sharing options...
Staff Ben Posted January 5, 2016 Staff Share Posted January 5, 2016 It can depend upon what saved the TIFF previously. Photoshop can embed a layered version of the image as additional data. We currently don't import this, and consequently wouldn't save it back out again. We will soon have the option to import PSD data from a TIFF and embed Affinity layers in saved TIFF files. Quote SerifLabs team - Affinity Developer Software engineer - Photographer - Guitarist - Philosopher iMac 27" Retina 5K (Late 2015), 4.0GHz i7, AMD Radeon R9 M395 MacBook (Early 2015), 1.3GHz Core M, Intel HD 5300 iPad Pro 10.5", 256GB Link to comment Share on other sites More sharing options...
GFS Posted January 5, 2016 Author Share Posted January 5, 2016 Thanks Ben. This tiff is coming out of an old Mac software. So is the file size different simply down to a different way of writing the file, as opposed to a compression algorithm? (Is there any way in AP to batch open/save this type of file? Seems like a good way to save on having to buy new hard drives.) Quote Grumpy, but faithful (watch out all you cats) Link to comment Share on other sites More sharing options...
Staff Ben Posted January 5, 2016 Staff Share Posted January 5, 2016 Currently we don't have batch processes. That's coming in the future. It could be down to the compression method - old TIFFs may not be saved with the best compression. Could be RLE instead of ZIP (or even no compression at all). I'd also be interested to know what other tags are being dropped when resaving. Quote SerifLabs team - Affinity Developer Software engineer - Photographer - Guitarist - Philosopher iMac 27" Retina 5K (Late 2015), 4.0GHz i7, AMD Radeon R9 M395 MacBook (Early 2015), 1.3GHz Core M, Intel HD 5300 iPad Pro 10.5", 256GB Link to comment Share on other sites More sharing options...
GFS Posted January 5, 2016 Author Share Posted January 5, 2016 Ben, these are un-compressed tiffs. Would you like me to email you a tiff for testing. AP always does this ... even when the tiff is passed through Aperture, then output as a version. Quote Grumpy, but faithful (watch out all you cats) Link to comment Share on other sites More sharing options...
Staff Ben Posted January 5, 2016 Staff Share Posted January 5, 2016 We probably always apply lossless compression when saving to any raster format. So for TIFF, I think we apply LZW as standard. I'd expect any TIFF that was uncompressed to shrink significantly with LZW applied. Quote SerifLabs team - Affinity Developer Software engineer - Photographer - Guitarist - Philosopher iMac 27" Retina 5K (Late 2015), 4.0GHz i7, AMD Radeon R9 M395 MacBook (Early 2015), 1.3GHz Core M, Intel HD 5300 iPad Pro 10.5", 256GB Link to comment Share on other sites More sharing options...
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