LR4 Tiff to Dng conversion doesn't work for very large files

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  • Updated 6 years ago
Hi,

In order to uniformize my photo library I've started to assemble my for Catalogs in only one and to convert all my pictures in dng.

The TIFF to DNG conversion works well with the exception of:
1 - the very large panoramas ( 100 MB) built within Photoshop and reimported within LR as a tiff.
2 - the scan of 4"*5" plan films (140 MB in B&W and 250 in color)

Regards,
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Benoit PETOT

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Posted 6 years ago

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Tom Hogarty, Lightroom Product Manager

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I would personally not recommend converting TIFF files to DNG files. DNG is an extension of the TIFF format designed to accomodate scene referred data and the associated metadata. TIFF is the ideal format for output referred data stored in an existing TIFF format.

Regards,
Tom
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Benoit PETOT

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Hi Tom,
Thank you for your fast answer.

I knew that there is no real technical benefit to convert tiff to dng (Abode’s documentation as well as external is pretty clear) but:

1 – As an old software developer I appreciate the simplification and the normalization brought by an unique container for the management of my archives.

2 – with the capability of creating books directly from LR4, I wish I could merge all my pictures within a unique Database (5000 digital Leica, 2000 digital Hasselblad and more than 30 000 scanned old pictures). The more the tools are simple and homogenous the more it’s easy to focus on my photographer concerns.

3 – I presume that if there is a bug in the processor/memory management, each specific problem can help to solve it.

BTW, I’ve retried to make the conversions yesterday and it worked:
• When I convert a large bunch of photos (1000 including a few very large), the conversion process stops, from time to time on the large ones.
• When I convert only medium pictures (<150Mbytes 6*6cm slides) it works perfectly (3 hours to convert 1000 pictures on a dual core 2G, windows 7)
• When I process separately the large ones (36 panoramas & 4”*5” slides) it works well

I hope that these info can help.
Regards,