Slideshow prepare Preview question Lightroom CC

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• Curious question about previews of Lightroom and Camera Raw Cache

  Posted in the Flickr Lightroom group as well:

  I noticed something on the previews of Lightroom (3.6) and cache Camera Raw, intrigued me.

  I create a new, empty catalog, and purge the Cache of Camera Raw.

  Then I import ONE Nikon (NEF) RAW file with dimensions 2592 x 3872 (10 mega pixels - 10,036,224).

  Then I export this NEF file to a TIFF 8-bit file uncompressed. You can expect this file size TIFF about 30 MB (10 megapixels x 3 bytes per RGB value) and in fact the TIFF file is size of 30,135,830 bytes. If you export the TIFF file same ZIP compression to specify the size of the resulting file is 10,834,038 bytes. The compression achieved here is obviously going to be highly specific to the image, but so far no surprises.

  When you import I said make 1:1 previews and I spend in the Loupe and see the whole picture in the format 1:1. I also visit the development module and do a lot of manipulation on the image but not cropping.

  At the conclusion of all this, I got out of Lightroom and examine file camera Raw Cache as well as previews of Lightroom file size. It would be my expectation that the previews folder should have a complete image rendering and Camera Raw Cache should also have a display form of raw data. What do you expect the size of these respective folders to be?

  Indeed - in my tests that the previews folder totals a simple 1 675 264 bytes and Camera Raw Cache that contains an image DAT file cached one is simply 267 374 bytes. This doesn't seem like enough bits to preserve the image rendered, nor there at - it an image is full-size, nestled in the actual catalog - the file is not large enough to hold that. And yet I can use the magnifying glass to the format 1:1 mode and move an image to the image without loading delays (even when you import multiple files).

  I wonder if I missed something obvious in my analysis and that, if someone might not care to speculate on what magic Adobe's practice here. Even if grant us them special algorithms to compress their insights that I don't see how they can achieve a compression so much larger than the file ZIP compressed TIFF realizes.

  And for those who might think to ask - I have told these experiences with multiple raw images and on MAC or PC platforms.

  I look forward to answers or interesting theories or maybe someone could reproduce the results of the experiment and report.

  The previews in the preview cache are JPEG files. JPEG compression is much more effective than the lossless zip compression. No magic here.

  Mr. Chan is obviously the expert on regards to the Camera Raw Cache.

  HAL

• Previews of Lightroom appearing only a few at a time?

  All my image previews appear grey in my Lightroom library. When I then open an image and begin to develop it, it then appears in the library, as well as my background Preview toolbar. I will develop in 3-4 images and they all appear, but as I'm on the 4th or the 5th first that I developed then goes back to gray and so on. It's as if he can only handle showing previews of 3-4 images at once? Of course, I tried uninstalling, reinstalling, etc. I have a MacBook AIr from 2015. Everything goes normally but she is a terrible pain in the workflow. Any help is appreciated!

  Hi aguenther,

  Please, rename the Preview.Lrdata folder and restart the Lightroom and check if that helps.

  Steps to follow:

  Go to the image folder > folder Lightroom > Yo should see there should be a file that ends with "Lightroom 6 catalog Previews.lrdata", rename the folder to "Lightroom 5 catalog Previews.lrdata.old.

  Let us know if that helps.

  Kind regards

  Mohit

• I use Lightroom 5 on a PC. When I run the program, I get the message "Lightroom has encountered an error when reading the cache and must leave the preview. Lightroom will try to solve the problem next time. In french: Lightroom a r

  I have not found any solution. You have an idea? Thank you.

  Your preview cache was damaged and should be removed.

  Using Windows Explorer or the Mac Finder, navigate to the folder that contains your Lightroom Catalog - usually within my pictures or photos.

  Delete the folder with the name ending by Previews.lrdata. Do not remove anything else. Now, launch Lightroom.

• Question Lightroom Mobile Sync

  Hi all

  I think that ultimately, I need help from technical support Adobe, but that throw out there for others who have similar questions.  I've had two different subscriptions with Adobe (don't ask why): (1) monthly subscription to the photographer who included Photoshop Lightroom and Photoshop CC, and (2) a single subscription to InDesign.  I obviously should have bought the full suite of CC knowing what I know now.  I noticed the Black Friday sale before Adobe offered and contacted support by chat for 1) cancel subscriptions for both above and 2) replace them by a subscription to subsequently complete CC I thought allowed access to all Adobe applications.

  When I run Lightroom in my identity plate area, I try to use Lightroom Mobile sync (worked until I canceled my photographer package) and am currently get a message that my laptop Lightroom has expired and cannot perform the synchronization between the Office of Lightroom and Lightroom on iOS.  When I connect to my account on the Adobe Web site to watch to see what subscriptions I active, I show two lists: (1) my newly acquired Creative Suite of cloud and the package of 2) my expired photographer listed have expired.

  Yet once again, I expect that the full suite of Cloud Creative should have allowed me to synchronize Mobile with Lightroom.  Instructions for Lightroom syncing seems to indicate that this is the case (screenshot below).  All advice appreciated words.

  Thank you!

  

  Hello

  The problem has been solved since the back-end, could you please sign out of Lightroom and then sigh, LR mobile should work now.

  Concerning

  Rohit

• Question Lightroom error

  This error message "Lightroom has encountered an error when reading of he is seen hiding and need to quit smoking.» Lightroom will attempt to solve this problem, the next time it starts. "And then it closes immediately. I tried to uninstall and then reinstall because I own a copy of LR 5. I still get the same message. Help, please!

  Hello

  Overview of a cache file must be deleted in this case.

  You need to go to the location where your Lightroom Catalog is stored and delete the file Previews.lrdata (the .lrdat file)

  By default, the catalog is stored in the Pictures\Lightroom folder

  Kind regards

  Claes

• Install versus execution question - Lightroom CC

  Hello world

  I just wanted to mention really there are 2 questions that we see currently.

  Question n ° 1

  You cannot install Lightroom CC because it is not available in the creative cloud app

  Solution: Login and in order to update the list of available applications

  (it was also noted that she only is available as a trial for the subscribers - no solution AFAIK still there)

  2nd edition

  You cannot run Lightroom CC after installing it. It will start just not.

  On Windows if you click right on C:\Program Files\Adobe\Adobe Lightroom\lightroom.exe and chose "Run as Administrator" will open for higher priviliges. Once again, nothing happens.

  Solution: none yet

  Hope that helps to clarify the issues in two

  in fact, record and return is necessary! restart and reinstall help not, but recording and back indeed:

  Here, the official answer for Macs, but it works for Windows as well. CC applications close immediately after the launch

• Previews of Lightroom

  I just got a new MacBook Pro and Lightroom 5 and other older Mac applications. I am able to open my Lightroom Catalog, but the previews in the library Module are greyed out outside in the grid view and on the film, although the sides, colors, flags, etc. show, and there is the correct number of images gray for the selected folder. If I select one and move the develop module, the image appears. Any suggestions?

  Subsequently solved with the help of the Adobe chat. Built a new catalog and previews now visible. Thanks for your suggestions.

• Help!  My Photos of Preview of Lightroom are associated with the bad image.   How can I fix it?  Thank you!

  Hello

  Part of my images from lightroom 5 were associated with bad images.  I found this after I exported the entire catalog.  How do I re - associate images so that the corrections that I made are to correct pictures?

  Thank you!

  I found the solution... I renamed all the files and made Lightroom force me to reassociate the preview images again.

• Question Lightroom 4.1 tips and installation

  Hello

  I better 3.6 LR LR 4.1 on my laptop Windows 7 with 8 gigs ram. I need to free up space on my internal hard drive, so I'm moving my images on an external hard drive 1 t, connected via usb 2.0, unfortunately.

  • question 1: is - it matter in which order I do the above? In other words, should I do the upgrade to 4.1 first and then move my images/catalog to the external hard drive or do I move my pictures and then upgrade?

  I've heard of how LR 4.1 is slower than LR 3.6, so I am, a little worried about performance.

  • question 2: someone at - it specific advice on the LR configuration for best performance in light of my files is stored on the external hard drive via USB 2?

  (I use this computer for web surfing and image programs.) Not to mention LR, I have also run Camera Raw, PS CS 5 and Premiere Elements. I thought I'd do two images of catalogs-again I suggest to hd and film ext clips that I want to keep on the internal hard drive. Who is? )

  Thanks in advance,

  D

  ziggycat4 wrote:

  Hello

  I better 3.6 LR LR 4.1 on my laptop Windows 7 with 8 gigs ram. I need to free up space on my internal hard drive, so I'm moving my images on an external hard drive 1 t, connected via usb 2.0, unfortunately.

  • question 1: is - it matter in which order I do the above? In other words, should I do the upgrade to 4.1 first and then move my images/catalog to the external hard drive or do I move my pictures and then upgrade?

  Doesn't matter, as long as you do it right

  I've heard of how LR 4.1 is slower than LR 3.6, so I am, a little worried about performance.

  • question 2: someone at - it specific advice on the LR configuration for best performance in light of my files is stored on the external hard drive via USB 2?

  It is slower for some people and not slower for others. I don't think that anyone in these forums has understood what the reason is for slow on some computers. The only thing you can do is try it on your computer. Moreover, as I have read, in Lightroom performance problems are unrelated to USB 2.

  (I use this computer for web surfing and image programs.) Not to mention LR, I have also run Camera Raw, PS CS 5 and Premiere Elements. I thought I'd do two images of catalogs-again I suggest to hd and film ext clips that I want to keep on the internal hard drive. Who is? )

  Nope, several catalogues never made sense to me. You simply reduce your effectiveness by having several catalogues here. A catalog is easier, this way you won't have to switch back, you never wind up importing in the wrong catalog, you can search through all your photos and videos, etc. A catalog is the way to go.

  Also, did I mention that a catalog is the right way to go? Because if I didn't mention it, let me say that a catalog is the way to go.

• Great space occupied by previews of Lightroom

  I have about 22 GB of images on my pc; In addition to this previews.lrdata folder takes more than 3 GB.

  This seems a high proportion of disk space total image (or maybe that's not?).

  Is there a way to reduce the size of this folder found?

  I tried to optimize the catalog but that has no effect.

  Lightroom is running OK, but I could do it just with a little more disk space.

  Thank you very much.

  Mark

  I would say / 3 gb is not that much to 22 GB of pictures, and if the / 3 gb will make a difference to your computer, I would buy another hard drive.

  That said...

  If you are willing to wait for new previews to build when you want to watch them, you can remove the previews.lrdata folder, but just be aware that all previews must return again in the future.

  If you go into the settings of the catalogue, you can reduce the size and quality of any future glimpses that are built, but keep in mind that these are the previews you see in the library module, if you don't want them too small or of poor quality.

  If you have changed at the premiere of smaller size and you want to perform a new made to them you would have smaller, to delete the folder previews.lrdata (Lr closed) and then select all the photos in the grid view and go to the menu library > Previews > make Standard size found to rebuild in the smallest size.

  Alternatively, you can go to library > previews > 1:1 previews unravel to get rid of any size previews of full, but at this size, it seems not that you have a lot.

• Preview of Lightroom preferences

  Hello

  I use a screen resolution of 1024 x 768.

  In my case, does make sense to use a "Standard Preview size" 1440 pixels?

  

  I ask this question because the "Standard Preview size" (1440 pixels) is larger than my screen resolution (1024 x 768 pixels).

  Thank you!

  Yes

• Dell Inspiron which is unbootable - prepare the question of compensation

  I have a Dell Inspiron 1525 that works fine until I loaded Windows 8 and tried to upgrade (which failed).  Then one day I started and got the formidable preparation repair which cycles and cycles, and cycles without result.  I took the PC in the MS store and that they could not delete files from the disk or that it can begin.  So here I sit with a PC, Window 7 Pro and Pro Windows 8 disks but nothing works at the start of a.  I changed the boot sequence to start only on CD/DVD.  The Windows 7 disc begins to load and a Windows splash screen appears, but then becomes empty but no progress after that.  The disc of Windows 8 fair results in a cursor blinking in the upper left.  What can I do to load something that gets this PC working again?

  .  I have a Dell Inspiron 1525 that works fine until I loaded Windows 8 and tried to upgrade (which failed).  Then one day I started and got the formidable preparation repair which cycles and cycles, and cycles without result.  I took the PC in the MS store and that they could not delete files from the disk or that it can begin.  So here I sit with a PC, Window 7 Pro and Pro Windows 8 disks but nothing works at the start of a.  I changed the boot sequence to start only on CD/DVD.  The Windows 7 disc begins to load and a Windows splash screen appears, but then becomes empty but no progress after that.  The disc of Windows 8 fair results in a cursor blinking in the upper left.  What can I do to load something that gets this PC working again?  .

  Something like DBAN allows you to clean the disc entirely (zero / writing) and then try to install the operating system from a well known together of the installation media.  (CD, DVD, USB key, etc..)

  You could contact Dell and get them to send media recovery/restore.

  You can download the ISO for specific Windows 7, _ _ - bit editing, you have the product key (sticker on the computer, probably).  Try it and new media.

  You could create a Ubuntu Live media set and start to look at the situation in car - erase all partitions...

• Help! Real-time preview question

  Animations, and I wanted to time transitions to a really beautiful piece of music, however, when I go to preview in real time to time transitions, doesntplay several times in real time which mess up the timeing (the calendar is for dips, so using the waveform is useless). Help, please!

  1. make sure you use the latest version 13.8.1. a great improvement in performance in the last version watch here: after effects 2015.3 - my favorite Vimeo features at 00:57

  2. If this does not work, see if in preferences of hardware acceleration is enabled, and if this is the case, turn the POWER off.

• Question Lightroom external editor

  Hey everybody, after a recent update for Lightroom (latest version) Despite me saying the prefs I want to open this file in Photoshop CC 2014 he continually ignores this and opens the file in the 2015 version - the option is there in the export dialog, but he simply ignores my instructions. Is Adobe trying to discourage us to use the 2014 version now? I really hope not that I need to use the version of 2014 due to the problems of brush healing in 2015 - anyone else seeing this?

  Definition of the 'old' version of Photoshop is also simple to add to the list "of additional external editors" in the preferences.

  For Ironman - The default Photoshop will be CC2015.6.1 and the 'additional external editor"CC2015.1.2

  (or default CC2015 and additional CC2014 in the case of Andy).

  When setting up the 'additional external editor"it is important that you choose the appropriate version of 'old' app/exe program file.

  When you right-click on a photo and click [Edit-In] you will have two lists for the PS, one for each version.

  In the same way, you can create several 'additional external editors"that point all to ch, but with different options for the type of file and profile (for example PSD, TIFF, JPG, etc.)

  Lightroom extra external editors - TipSquirrel