LR4: Immediate catalogue construction.

  • 1
  • Idea
  • Updated 6 years ago
  • Implemented
Feature request:

Allow an option to fully construct catalogue preview entries for all files being imported into the catalogue. If the image extraction from various raw files embedded jpg preview files is somewhat faster than processing the raw information, further options to use embedded or to fully process the raw information should be provided.

Motivation:

It seems that LR4 import operations only builds 1440pix for images that are currently displayed on the grid library view. If there are only 20 thumbs visible anywhere on the screen, only those 20 will be have fully constructed preview images and processing stops. If you "page down" and display the next 20 images, previews will construct for the next 20.

There does not seem to be any way to cause all images in the directory to be fully preview processed other than by scrolling through the file. This proves to be awkward when attempting to quickly scroll through images. Here are two examples:

1. If you are shooting an event such as a World Cup speed skating competition (possibly 300 or more shots from a single distance competition before you have to go to the press room) and must submit selected images to the wire services, you wish to quickly scan all images in Loupe View for star-selection and do the needed white balance, intensity, and crop. The thumb presented is "decomposed" and must be loaded into ACR before it can be star-selected or ignored for processing.

If the preview images are fully constructed, the selection process is much faster and cleaner - in spite of the fact that some preliminary time is needed to construct the 1440pix preview either from the embedded jpg or actual raw data.

2. If a large file system is imported, the preview images are not constructed until a selected directory is displayed. For example, I have 700,000 images recorded in a Bridge catalogue. Importing this into LR4 is "very fast" compared to Bridge (many hours for LR4 compared to many days for Bridge) - however the images cannot be viewed since the previews will only show an almost useless extrapolation of a thumbnail. This does not permit proper browsing of images because the time between constructed preview image display is far to long. When the directories are imported, it is mandatory that the preview construction is done during import.
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Tony Field

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Posted 6 years ago

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Photo of Rob Cole

Rob Cole

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You can generate all previews or selected previews using the Library menu -> Previews -> Render..
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Tony Field

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Thank you Rob. I was not aware of the operation. This partially solves the problem. However, it would still be desirable to construct preview images when the folder is imported. This is a time issue. Here is a test I did some timings on with LR4 under Win7 64 bit.

700,000 images on networked drives (mostly raw and some psd):

The initial library entries are made at the rate of 1 image per 1/2 second. The entire import operation would take 4 days of continuous processing to do the import.

The image preview operations are done at the rate of 1 image per 2 seconds. This would take 16 days of continuous processing to build previews for the entire library.

This results in 20 days of continuous processing.

If the import and preview were generated together during the import process, the saving in time would be 4 days.

Of course, not everyone would have so many images. None the less, a 20% reduction of import/preview gen time would be welcome.
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Jim Wilde, Champion

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I may be missing something here, but you HAVE seen this option at the top of the right-hand panel in the Import dialog, haven't you?

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Tony Field

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Thanks Jim, that is EXACTLY what I wanted to see. I really missed reading the screen properly and not interpreting the Adobe-provided documentation appropriately.
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Jim Wilde, Champion

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That's fine. There's also another setting hidden away in the Catalog Settings (File Handling tab)....there you can set the size of the Standard previews (general advice would be to have it set to a size which matches at least the horizontal pixel dimension of your fit/fill view. You can also set the quality of the preview, and lastly you can choose when (or if) your 1:1 previews are discarded.