LIGHTROOM creating 1:1 previews in Library does not happen in Develop

  • 1
  • Question
  • Updated 6 years ago
  • (Edited)
I have a Nikon D3x and it produces approximately 20Mb files in NEF. LR4 takes extremely long time to finaly load the previews. So I created 1:1. Works great in Library, But when I switch to develop I am back to the very, very long time to finish the preview. Is this correct? does this need to change so I can work much quicker?
Photo of gary little

gary little

  • 3 Posts
  • 0 Reply Likes

Posted 6 years ago

  • 1
Photo of Victoria Bampton - Lightroom Queen

Victoria Bampton - Lightroom Queen, Champion

  • 4123 Posts
  • 1471 Reply Likes
It is correct, Develop is processing the raw data whereas Library is just using the pre-built preview. What spec machine are you using?
Photo of jdv

jdv, Champion

  • 728 Posts
  • 56 Reply Likes
Increase your ACR cache. It won't affect the first preview load in Develop, but it will help with the initial data that the preview is base off of.
Photo of Rob Cole

Rob Cole

  • 4831 Posts
  • 379 Reply Likes
Gary,

There are two caches that can potentially help speed develop loading.

1. ACR cache, on disk (helps a little - *very* little). initialized when you build 1:1 previews, or edit an image in develop...
2. Negative cache, in RAM - helps a lot, except it only stores the last 4 raws edited - there is no "look ahead" caching.

So, unless it's one of the last 4 edited, switching to develop view will always be slow, - slower for higher rez images.

The only thing you can do about it, that I know of, (assuming Lr4 is already performing normally on your system) is to turn off the loading indicator (see develop view options), since you can start editing before it's completely loaded - once the sliders are enabled.

Rob
Photo of gary little

gary little

  • 3 Posts
  • 0 Reply Likes
Thanks all for the quick replies. I will try them out and hopefully things will improve. As I read the comments I realized that it was dumb of me not to realize that, of course, in the Develop the whole image has to be there. I am hoping that the cache items will help.
Photo of Rob Cole

Rob Cole

  • 4831 Posts
  • 379 Reply Likes
Question: Do lossy-compressed DNGs load for develop significantly faster than regular DNGs or NEFs?, or about the same??

Gary - please define "very, very long". (to determine if this is normal/expected, or is something abnormal slowing it down).
Photo of garylittle

garylittle

  • 15 Posts
  • 0 Reply Likes
I do not use lossy-compressed so I cannot answer that. Ver, very long means that it may, not all the time, take up to 2 minutes to get the view in the develop pane from the loup.
Question: would using DNG instead of NEF make a difference.

Computer:
Windows Win 7 64 16G ram latest release of LR 4 cores

Second question now that I think about it. The ram indicator never seems to go more that 4G when using LR. Is the correct? I though 64 bit version were supposed to use all the ram.
Photo of Rob Cole

Rob Cole

  • 4831 Posts
  • 379 Reply Likes
Well, 2 minutes means there is some interference due to something in your system that Lr is not playing nicely with. It should only be a few to several seconds, depending on horsepower.

I recall now I tried lossy DNG and it was not much faster, thus I abandoned a plugin that would allow one to edit the lossy compressed version, and auto-apply those to the big raw for exporting...

I still wonder what is the shortest, and typical loading times for your NEFs, when it's not taking 2 minutes.

Lr is not geared to use all available ram, so having ram indicator stay below 4G is not abnormal. (your 64-bit OS can address more ram than a 32-bit OS, but that doesn't mean Lr itself will use much more).

When things are working normally, it takes no more time to process NEF than DNG, but when things are working abnormally, then all bets are off - I doubt it will help to convert to DNG, but ya never know - doesn't take long to try it.
Photo of Victoria Bampton - Lightroom Queen

Victoria Bampton - Lightroom Queen, Champion

  • 3992 Posts
  • 1405 Reply Likes
That might be an interesting plug-in for D800 users Rob - work with a low res lossy version then swap for a full res?
Photo of Rob Cole

Rob Cole

  • 4831 Posts
  • 379 Reply Likes
Yeah, it would be possible to edit a low-res version more quickly, then swap the photo file for printing or exporting.

But would more than a handful of people use such a plugin?
Photo of Victoria Bampton - Lightroom Queen

Victoria Bampton - Lightroom Queen, Champion

  • 3992 Posts
  • 1405 Reply Likes
I was thinking it would be more interesting to apply to volume - i.e. point to a folder and let it runs its various conversions overnight, so it's nice and fast when you're ready to work in the morning. Probably of more interest to wedding photographers and suchlike, but I have no idea of the number of people who might use it.
Photo of Rob Cole

Rob Cole

  • 4831 Posts
  • 379 Reply Likes
Of course, it only makes sense en-batch. (otherwise you might as well just wait for the singles to load...).

Try Edit In Lightroom. - it does exactly what you were suggesting. DNG only @now.