Why the drastic file size reduction in cropped images?

I just cropped a 9MB image a TINY amount and the resulting image was 756KB. Why? Is this normal?

People use the word "resolution" two different ways.
Some people use resolution to mean "pixels per inch" or ppi, and if you have a photo that is, for example, 1200x1800, you can print this photo at 300 ppi (in which case it would print as 4x6), or you can print the exact same 1200x1800 photo at 600 ppi (in which case it would print as 2x3). Same photo, same number of pixels, many different ppi values.
Some people use resolution to mean the number of pixels in the image, in which case pixel dimensions are the same as the resolution.
If you think of a photo in terms of pixels (height and width), then you never get confused. If you think of a photo as ppi or resolution, well ... who knows what that means ...

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Why the different file sizes?

Can anyone tell me why some songs are in the 20-30MB range, and most are only 3 or 4MB range? And more importantly, is there any way to shrink down the big ones? They make the CDs I burn very short indeed.

The file size of your imported songs will depend on your import settings in iTunes. An individual file size of 20-30mb sounds like you are importing in WAV or Apple Lossless. mp3 or AAC will have the same file size when using the same bitrate. For example, the average 4 minute song imported in AAC @ 128 kbps will have a file size of 3-4mb.

Why is Keynote storing images 20x larger than the original file size upon import?

In Keynote, I'll add a 150KB PNG image to a slide and the 500KB presentation goes to 3.7MB... a more than 3MB increase. I'm trying to troubleshoot large file sizes as a simple deck takes up 50-100MB on disk. Anyone know what is going on to make the file 20x larger once added to Keynote? And how I can keep the file size down? The 'Reduce File Size' option is worthless in this case... offering a less than 10% reduction on the earlier 20x amplification. Thanks

Chris H 71 wrote:
This was originally in Keynote 09.
Yes converting an existing version 5 file in to Keynote 6 does many strange things. Any existing version 5 files I have, I continue to edit in 5. When starting a new presentation, I can use 6 without many problems at all.
I provided the files to replicate the issue to Apple support and never heard back.
Apple do not provide feedback to users on issues, they only request information from users.

Why is "Reduce File Size" in the "File" menu always disabled?

I have a rather large presentation file, about 100Mbyte, and Keynote has become almost impossible to use, because it has become so slow.
Have to wait about 5 seconds for each letter to appear on screen after typing! Almost impossible to use Keynote under these conditions.
So I tried to use "Reduce File Size" to reduce the presentation file size by compressing the images, but "Reduce File Size" is always disabled!
Anybody else having such problems?
Gerhard

OK, sounds like memory will be fine, so let's look at some other stuff...
Is it only one particularly keynote presentation that slows up for you, or does keynote behave in the same way even if you start from scratch and create a new presentation?
If it's just the one presentation then there's probably some content (possibly video) within it that KN takes exception to. Sometimes a single problematic slide or piece of content can slow down the whole app.
Is the problematic presentation one that was imported from Powerpoint? If so, import it again and look carefully at the import error/warning logs.
Before you start keynote, start up activity monitor - which will give you an indication of what programs are using all the CPU/memory/disk bandwidth etc. You'll then have an idea of whether it is KN maxing out on CPU or whether anything else is dragging the system down.
Another thing you could try would be to log in to a different user account on your machine (create one if necessary) and then try opening the presentation from within this different account. If this works for you then it suggests a problem with the keynote plist file in your original user account.
I don't know if it'd be acceptable to you, but if you could post a link to your problematic presentation then I could download it and try it out on my normally reliable Keynote on one of my computers. (Make sure that you've ticked the box to embed all media in the presentation)
Hope some of this is helpful,
Mike.

RE: File Size Reduction by Hiding Layers

I've come across the trick of hiding layers to reduce file size, however am wondering exactly what is happening.
Here's my situation.
20.6mb PSD
Hiding the layers reduces the file to 13.1mb
I've been told that the file reduction is because preview images are no longer being generated.
Could preview images really be accounting for nearly 40% of the file size?
To test this I saved this file as a JPG at 100% quality (not for web) and yielded a 1.34mb file.
This leaves me with roughly 6.6mb of file reduction unaccounted for.
Is something else being siltently compressed/compatibility settings not included/other info being excluded from the file when layers are hidden?
NOTE:
I need to make sure my files have maximum compatibility for opening them in Lightroom and other programs that open PSDs like Painter - so compatibility settings are important.
I need to make sure that everything will still be setup properly for print and no compression is ocurring.
Could some please tell me what exactly is excluded from a file to lower the file size 40% when hiding layers?
Thanks!

Similar, yes... but that still doesn't answer my question
2400x1600px image
only a background layer
RGB 8bits/channel 72dpi
19.2mb
...hide layer = 9.91mb
.. white layer on top = 10.1mb (similar results as you said)
DIFFERENCE: 9.29mb
So, back to the question. Is it REALLY just the thumbnail/preview image taking up 50% of the file size in this case? Seriously? I would think that Adobe would be a bit more efficient with saving preview images. So...back to my earlier test to try and get a comparison of what a full size/full quality preview image would weigh, I've saved this image as:
high res JPG (not for web) = 1.55mb
compressed (layered) PNG = 3.64mb
compressed (layered) TIFF = 3.99mb
I also tried saving different combinations of layered/compressed versions of the PNG and TIFF files (although I think JPGs would be a more accurate representation of preview image file size). Uncompressed PNGs and TIFFs were far too large for the 9.29mb difference.
These don't even come within a couple of mb of the file size reduction from hiding the layers....
So, my question:
If hiding a layer is reducing the file size by supposedely rendering less pixel data to the preview images, then
- why don't any of these "mock" preview image situations come close to accounting for the size in reduction?
Even a layered lossless compressed TIFF still leaves an unexplained 5mb+ (9.29mb total file size reduction - 3.99mb TIFF)
I'm curious and need this for a specific (yet reocurring) situation at the workplace.
It really seems like there's something else that is happening when you save a file with layers hidden.
Is there any other possible scenarios (generating mutliple thumbnail sizes/sets, metadata based on pixel data, other information based on pixel data, silent compression, settings changing, etc) that could possibly explain this?

16x9, 300ppi, 75mb tiff file, LR converts to 1mb jpg. Export in LR 5 is being done at 100%, no file size reduction.

I've got a 16x9, 300ppi, 75mb tiff file that LR converts to 1mb jpg. Export in LR 5 is being done at 100%, no file size reduction. Can't figure out why it is downsizing so small? Even upsized to 420ppi in PS and the export was still only 2mb. Stock agency wants 3mb .jpg minimum. Any help appreciated. Thanks.

Using PS CS6 with NO changes applied to the original TIFF the JPEG file size is 8.686 MB. The slightly larger file size is due to metadata differences between LR and PS.
Both Adobe applications (PS CS6 and LR 5.71) are producing near identical and much larger highest quality JPEG files. PS 12 Quality is the same as LR 100.
SUGGESTION:
1) Close LR and rename your LR Preferences file by adding the extension .OLD to it:
Mac OS X
Preferences
/Users/[user name]/Library/Preferences/com.adobe.Lightroom5.plist.OLD
Windows 7 & 8
Preferences
C:\Users\[user name]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 5 Preferences.agprefs.OLD
Reopen LR and it will create a new Preferences file. Try the JPEG Export again using the same settings as I have posted.
2) If still no change I suggest uninstalling LR, delete the new LR Preferences file created in step #1 above, keep the .OLD Preferences file, and reinstall LR 5.71.
3) If all is well now close LR and try restoring you original Preferences file by renaming the new Preferences file something like .OLD.OLD and removing .OLD from the original file.

PDF File Size Reduction

Currently, I am using Adobe Reader XI, but am looking for a version that allows for the reduction of the PDF file size. This is especially useful when e-mailing documents. Can anyone suggest the best version to keep the editing functions (ex. PDF to Word), but add the reduction capabilities?
Thanks.

Bill-
Thanks so much.
I’ll take a look at upgrading to Acrobat and see if that will do the trick.
I appreciate the response.
Thanks again.
Ed Perne
Corporate Director, Human Resources & Risk Management
11500 W. Olympic Boulevard, Suite 345
Los Angeles, CA 90064
(p) 310-235-2745, ext. 408
(f) 310-943-1600

Why the db file is so big?

hello,now i use BDB as my database;
pdb->open(NULL, m_dbName, NULL, DB_QUEUE, DB_CREATE, 0);
now, there have two processes , one is FEP, the other is DP
FEP write 10000 datas to DB_QUEUE one second;
DP read 10000 datas from DB_QUEUE one second;
after the two processes run one hour, the db file become so big,
the size of db file is 1,425,796KB ,but there is no record in db file;
why the db file is so big?
the db file will become little automatic?
do you have some APIs to make the db file little?
thank you!
Edited by: 829357 on 2011-1-19 下午5:01

Hello,
Based on your description, it sounds like you didn't assign a queue extent size when you created the database.
From the BDB Reference Guide, see the section on [Selecting a Queue Extent Size|http://download.oracle.com/docs/cd/E17076_02/html/programmer_reference/rq_conf.html#am_conf_extentsize]. It sounds like the behavior that you are looking for is the ability to automatically delete queue extents once they become empty. This feature should do what you're looking for. Refer to the C API Guide ( here ) on how to define a queue extent.
If you do not want to use Queue extents for some reason, another option would be to call truncate() on the database. However, that will result in deleting any records that might be in the database as well as truncating it.
Regards,
Dave

How I calculate the flv file size whe I recording from camera and microphone?

Hi all:
I'm recording video from my webcam and my microphone.
I would like to know how I can to determinate via some formula, approximately, the result file size due to camera and microphone configuration.
I show you my actual configuration:
     // setup cam
    cam = Camera.get();
    // setting dimensions and framerate
    cam.setMode(320, 240, 30);
    // set to minimum of 70% quality
    cam.setQuality(0,70);
    // setup mic
    mic = Microphone.get();
    mic.setRate(22);
Only ohert question:
What enconders are using to encoder video and audio by default?
Regards, Roberto.

I'd say 9.4 mb is correct. Email attachments always put on a lot of weight, so 12 mb as an attachment is probably right too.
Why don't you use a free service like Filemail? It's very easy to use, and you dont't have to sign up to use it.

Why the flashback log'size smaller than the archived log ?

hi, all . why the flashback log'size smaller than the archived log ?

Lonion wrote:
hi, all . why the flashback log'size smaller than the archived log ?Both are different.
Flash logs size depends on parameter DB_FLASHBACK_RETENTION_TARGET , how much you want to keep.
Archive log files is dumped file of Online redo log files, It can be either size of Online redo log file size or less depending on online redo size when switch occurred.
Some more information:-
Flashback log files can be created only under the Flash Recovery Area (that must be configured before enabling the Flashback Database functionality). RVWR creates flashback log files into a directory named “FLASHBACK” under FRA. The size of every generated flashback log file is again under Oracle’s control. According to current Oracle environment – during normal database activity flashback log files have size of 8200192 bytes. It is very close value to the current redo log buffer size. The size of a generated flashback log file can differs during shutdown and startup database activities. Flashback log file sizes can differ during high intensive write activity as well.
Source:- http://dba-blog.blogspot.in/2006/05/flashback-database-feature.html
Edited by: CKPT on Jun 14, 2012 7:34 PM

Tiff file size reduction

I notice that when I open a tiff file with CS6 and then close it, the size has been reduced. If I do the same thing with Microsoft Image software, the file stays the same size. Any idea why? As far as I know I am not telling Cs6 to compress the file.

Using PS CS6 with NO changes applied to the original TIFF the JPEG file size is 8.686 MB. The slightly larger file size is due to metadata differences between LR and PS.
Both Adobe applications (PS CS6 and LR 5.71) are producing near identical and much larger highest quality JPEG files. PS 12 Quality is the same as LR 100.
SUGGESTION:
1) Close LR and rename your LR Preferences file by adding the extension .OLD to it:
Mac OS X
Preferences
/Users/[user name]/Library/Preferences/com.adobe.Lightroom5.plist.OLD
Windows 7 & 8
Preferences
C:\Users\[user name]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 5 Preferences.agprefs.OLD
Reopen LR and it will create a new Preferences file. Try the JPEG Export again using the same settings as I have posted.
2) If still no change I suggest uninstalling LR, delete the new LR Preferences file created in step #1 above, keep the .OLD Preferences file, and reinstall LR 5.71.
3) If all is well now close LR and try restoring you original Preferences file by renaming the new Preferences file something like .OLD.OLD and removing .OLD from the original file.

Why does PDF file size increase each time I "save" tagging tasks?

Why does PDF file size increase each time I "save" tagging tasks?
Given:
1) I'm running Acrobat Pro 11.0.07 (this is most current version)
2) My file size starts at 750mb and ends up 15mb when finished tagging.
3) Only certain documents experience this increase, i.e., no visible pattern of document characteristics
4) PDF's are not full of images...in fact, mostly <H1> <H2> <H3> <P> <Figure> alt text, ect.
5) Occurs with text PDF's and/or fillable forms (again, does not happen to all documents...only some)
6) File increase occurs incrementally as tagging tasks are performed; i.e., each new save increases file size a few megabytes.
7) Occurs whether I "save" or "save as"
8) Difficult to optimize these files without corruption
9) I'm running Mac OS 10.9.4 (this is most current version)

Thank you so much for responding! I've been experimenting with the SAVE AS vs. SAVE for the past few days...and you are correct. It's funny because I've been tagging files for 2 years and never noticed this. Probably b/c I use both methods depending on the tagging tasks...some are more complicated than others and should not be overwritten. In those cases I SAVE AS new file.
I love this forum...thank you again!

Amazingly inefficient file size reduction

I have some Texinfo documents that are regularly updated and from which HTML and PDF documentation is then produced. The PDF as it comes from Texinfo is about 850 pages, contains a lot of small graphics, and is about ~50Mb in size. When I use Acrobat (v9.5.1 running on Windows 7 x64) to reduce the file size, the process takes in excess of 12 hours to complete, and when I look at processes in Task Manager when the file size reduction has completed, I can see that the acrobat.exe process has read 61Gb and written 11Gb. At the end of the process, the PDf has been reduced from 50Mb to around 30Mb.
The machine on which Acrobat is running is not at all underpowered - it has an Intel core i7 CPU and 12Gb of RAM. Any suggestions on possibilities for speeding up the file size reduction. The excessively long processing time is not a one-off aberration - I've run the file size reduction half a dozen times now over a few months, and it takes this long to reduce the file size on every occasion.

Hi jamesfb,
You can do so by resizing your image. It will be under the More (&) menu> image size

Is the file size of a selected image shown on Adobe Bridge CC 2014? If so, where?

Is the file size of a selected image among the filter categories? Or anywhere else? I know I can find it in Photoshop, but that is cumbersome.

The file size is shown in the Metadata panel.
You can not filter on file size but you can sort by file size.

How can I auto export a PDF File using the "Smallest File Size" preset and set the Exported File Name based on information from an Imported PDF?

Greetings all,
I am trying to create a script to automate a PDF export process for my company for inDesign. I’m fairly new to inDesign itself and have no previous experience with javascript, although I did take C++ in high school and have found it helpful in putting this code together.
We have an inDesign template file and then use the Multi-page PDF importer script to import PDF files. We then have to export two version of each file that we import, then delete the imported file and all of the pages to reset the template. This has to be done for nearly 1000 pdf files each month and is quite tedious. I’m working on automating the process as much as possible. I’ve managed to piece together code that will cleanup the file much quicker and am now trying to automate the PDF exports themselves.
The files are sent to us as “TRUGLY#####_Client” and need to be exported as “POP#####_Client_Date-Range_North/South.pdf”
For example, TRUGLY12345_Client needs to be exported as POP12345_Client_Mar01-Mar31_North and POP12345_Client_Mar01-Mar31_South.
There are two templates built into the template file for the north and south file that are toggled easily via layer visibility switches. I need to get a code that can ideally read the #s from the imported Trugly file as well as the Client and input those into variables to use when exporting. The date range is found in the same place in the top right of each pdf file. I am not sure if this can be read somehow or if it will have to be input manually. I can put North or South into the file name based on which template layer is visible.
I am not sure how to go about doing this. I did find the following code for exporting to PDF with preset but it requires me to select a preset and then type the full file name. How can I set it to automatically use the “Smallest File Size” preset without prompting me to choose and then automatically input some or preferably all of the file name automatically? (If the entire filename is possible then I don’t even want a prompt to appear so it will be fully automated!)
PDF Export Code (Originally from here: Simple PDF Export with Preset selection | IndiSnip [InDesign® Snippets]):
var myPresets = app.pdfExportPresets.everyItem().name;
myPresets.unshift("- Select Preset -");
var myWin = new Window('dialog', 'PDF Export Presets');
myWin.orientation = 'row';
with(myWin){
    myWin.sText = add('statictext', undefined, 'Select PDF Export preset:');
    myWin.myPDFExport = add('dropdownlist',undefined,undefined,{items:myPresets});
    myWin.myPDFExport.selection = 0;
    myWin.btnOK = add('button', undefined, 'OK');
myWin.center();
var myWindow = myWin.show();
if(myWindow == true && myWin.myPDFExport.selection.index != 0){
    var myPreset = app.pdfExportPresets.item(String(myWin.myPDFExport.selection));
    myFile = File(File.saveDialog("Save file with preset: " + myPreset.name,"PDF files: *.pdf"));
    if(myFile != null){
        app.activeDocument.exportFile(ExportFormat.PDF_TYPE, myFile, false, myPreset);
    }else{
        alert("No File selected");
}else{
    alert("No PDF Preset selected");
So far my code does the following:
1) Runs the Multi-Page PDF Import Script
2) Runs PDF Export Script Above
3) Toggles the Template
4) Runs #2 Again
5) Deletes the imported PDF and all pages and toggles template again.
It’s close and much better than the original process which was almost 100% manual but I’d like to remove the Preset prompt from the PDF script and have it automatically select the “Smallest File Size” preset. and then if there’s a way to have it auto-fill in the file name so no user input is required at all other than selecting each file to import. (If there’s a way to setup a batch action for the multi-import script that would be even better!)
Thanks in advance and if there’s anything else I can provide that would help please let me know! Even a nudge in the right direction will be a big help!

If you hold down the option key, it will typically show the location. Or you can often hit option-return on the file and it will reveal the file in the Finder, instead of opening it.
Final option is to open it, and just option-click the filename in the toolbar of Preview and it should show you the location.
It's probably an attachment to an email you've received. If you have Mail set to cache emails and their attachments it'll be stashed in a subdirectory of ~/Library/Mail. Which is fine.

Why the drastic file size reduction in cropped images?

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