Compression decreases the size of data.

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11 views

Which files and folders are compressed when using compact.exe /CompactOS

I am thinking of using NTFS compression (LZNT1) on my SSD using Windows 7, but I was a little unsure as to which folders would be a good candidate. I was aware that Windows 10 has introduced new ...
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0answers
12 views

7zip is creating solid .zip files. Cannot add/remove/overwrite to .zip files ad-hoc

I'm using 7zip as an archive creation tool. .7z files may be created as solid or nonsolid files. .zip files are supposed to be inherently nonsolid. I have ~5GB of hierarchal folder/file structure ...
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0answers
17 views

How does the LZMA Algorithm works?

Making some research on the net, I found that one of the most recent, optimized and high-performance algorithms for data compression, especially in term of compression ratio and decompression time is ...
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0answers
33 views

What's the Best data compression algorithm? [closed]

I have a binary file that i want to compress before flashing it in the microcontroller . Let's say that i have 10000 of microcontrollers , so in order to reduce time needed for flashing ... To add , ...
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0answers
14 views

What is the relationship between dictionary size and compression ratio? [duplicate]

For dictionary based compression algorithms, would there be any real benefit to having a very large dictionary ? In what cases can a large dictionnary be usefull : small or larger files ? Thanks in ...
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0answers
18 views

How to extract PPmD archive data in Ubuntu?

So I have a file called ppmdData with no extension, then when I use the file command on it, it says it is a PPMD archive data. When I run 7z x secret, I get an unsupported method error. Can anyone ...
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1answer
32 views

Extract Y-channel of every I-frame from MPEG4 movie as loslessly as possible

I'm working on a video tracking experiment and got stuck with videos that are quite badly compressed with the MPEG4 DivX 5x/6x codec. I'm fairly new to image formats, codecs and compression, but I ...
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1answer
52 views

Extract multipart rar, deleting parts as they are extracted

I have a multipart rar of 80GB unpacked. I have 5GB of free space, and every part of the rar archive is 2GB. What I'm looking for is to extract one part, delete it, extract the next, and so on, as to ...
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1answer
25 views

How to send a delta (differential part) of a large binary file over the Internet?

I have sent a large (>1GB) binary file to a friend over a slow metered data plan and now I need to send the second version of the same file only slightly changed. I want to send only the delta/diff-ed ...
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0answers
24 views

Cut and Compress 4K Video?

I have a 20 second video which size in 4K which size is 125 MB. It is only about a defective electronic component so accuracy is not important. I want it much smaller. I have these options in VLC ...
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0answers
13 views

Strategies To Reduce Compressed File Lookup Time With Pixz?

I have a PIXZ-compressed (level -9) tarball containing around 4000 files (ordered, like pages in a book): compressed size is ~670M. Currently I am programmatically accessing these files using the ...
3
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1answer
28 views

file splitting and compression in pipeline

So I have a massive file something like this... 1/20/2016,somerandomdata 1/20/2016,somerandomdata 1/20/2016,somerandomdata 1/20/2016,somerandomdata 1/21/2016,somerandomdata 1/21/2016,somerandomdata ...
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1answer
23 views

How can I compress a jpg images for google insights optimisation

I m getting this error when tring to see the speed of my website in google page speed: Optimize images Properly formatting and compressing images can save many bytes of data. Optimize the following ...
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0answers
16 views

Is it possible to run compressed files from dvd player

I downloaded a movie I wanna watch and I accidentally scratched my 4.7GB cd and I only have the 700mb ones now. Can I use my dvd player to run the movie from a compressed file (.rar file) ?
0
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1answer
20 views

Save-As from MS Office ignores 'compressed' setting

I have my complete data hard disk compressed (the Windows NTFS standard functionality), including root, all directories, and all files. When I open an Excel or Word file, and use Save-As, the new ...
3
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1answer
31 views

Linux pv | gzip doesn't delete original file

I'm pretty new to unix so go easy. Normally gzip file replaces file with file.gz (which i'm guessing is: create file.gz then rm file). I have some rather large files I'm compressing and I like to ...
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3answers
46 views

How can I compress every 10 files in a folder as a separate zip file?

I'm on Windows 10 and trying to work it out with Winrar. The folder contains 500 files, I would like to compress every 10 of them as a separate zip/rar file and create 50 zip/rar files. Is there a ...
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0answers
8 views

7zip - Encrypting and compressing each file in a folder while maintaining directory structure [duplicate]

Say I have a directory structure like this: - main folder - folder 1 - file 1.txt - folder 2 - folder 3 - file 2.txt - file 3.png - file 4.txt - file 5.jpg I'd like to ...
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0answers
34 views

What ffmpeg settings to get the best possible video resolution/framerate that my webcam is capable of?

I want to record the best possible video file (in terms of resolution/framerate/colors) from my webcam. Right now I am using this command: ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i ...
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0answers
31 views

Missing all the options in the Send To menu

So I'm just trying to send a file to a compressed folder from Explorer. But for some reason the only option I have there is "Bluetooth device". Did some Googling, found a suggestion to check the ...
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1answer
27 views

How can PowerPoint 2013 compress background images (not just inserted pictures) to reduce filesize?

I have a 10-slide presentation that is a whopping 234 Mb! This is because each of its slides has a high-resolution image as its background. (I tested this by temporarily setting all slide ...
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2answers
7k views

What is the cause of a high CPU usage of 'system and compressed memory' in Windows 10?

There is an observation to be made for Windows 10 on my laptop running with 24G memory available, and 2.5G used. There is no 'memory pressure'. Other questions have looked at memory consumption ...
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0answers
98 views

System and compressed memory taking too much memory

I recently upgraded my windows 10 OS but having a new issue with this "System and compressed memory" its taking too much memory and i have never seen this types of process in my task manager its ...
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0answers
23 views

What's the default compression algorithm used by Windows's Compression tool?

I'm trying to find out some documentation which details out which compression algorithm (e.g. deflate, LZMA, BZip2) is used by Windows 10's Send to 'Compressed Folder' tool. Some people reported that ...
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0answers
15 views

How do I shrink the size of a Djvu file?

I'd like to upload on Wikimedia Commons a djvu file from the Internet Archive, but unfortunately its size is larger than 100 MB, so I cannot. I was thinking that I could derive a new file from it, ...
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42 views

Convert and compress multiple tif (image) files into one PDF with OCR

I have found one old project that does exactly what I want! But it's broken somehow. Some crucial parts seems to be missing. It's a nightmare to configure. You can look at it here: ...
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2answers
63 views

what's the difference between “zip” and “compress” and “pack” ?

I saw article tile ——"Compress and uncompress files (zip files)" from Windows 7 document here. What's the difference between "zip" and "compress" and “pack”? Is it the same thing? I am so confused ...
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1answer
26 views

If I compress my NTFS drive, will visual/audio quality of media (MP4, AVI) be changed in any way?

I have several terabytes of 1080p quality video on my NTFS drive in various formats, mostly MP4 and AVI. Will visual/audio quality of these videos be changed in any way by ticking the box to enable ...
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2answers
39 views

How can it be that a ZIP file contains multiple files with the same name in the same subdirectory?

I had been extracting Free Pascal source code into an empty directory using Midnight Commander (under Mac OS X, which does distinguish between lowercase and uppercase AFAIK) and have been asked if I ...
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0answers
12 views

detailed listing and description of freearc switches

The documentation that comes with freearc seems a little bit sparse and outdated unfortunately, at least when reading posts on http://encode.ru/ And following the trial and error principle is ...
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4answers
1k views

Missing send to “Compressed (zipped) folder” after 1511 update or drag+drop to .zip

After allowing the Windows 10 1511 update to be applied, all options have disappeared from the right-click "send to" menu, except for "Bluetooth Device". Additionally, I can no longer drag and drop ...
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1answer
30 views

What methods exist for increasing usable consumer ethernet bandwidth in OSI layers 1-4?

What compression methods are applicable to a typical 1Gbps ethernet link? (non-enterprise bias, hardware or software, layer 1-4) Or: "What solutions exist to improve typical 1GigE ethernet ...
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0answers
27 views

Use avconv and image magick to convert video into reduced size gif

I'm using this answer to convert a video capture of a small section of my screen to a gif for a tutorial on a webapp. The problem is that the gif conversion increases the file size. avconv -i ...
0
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1answer
26 views

Booting from a compressed iso file

I'm trying to format my PC from USB, since booting from CD won't work. I'm trying to make a USB bootable .ISO file from a win7 CD. Now I've created a .iso file whose size turned out to be 4.29 GB. My ...
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0answers
18 views

Archive Directory Using Zpaq

I am trying to setup a backup system for a server that I manage to improve upon the old system. I am choosing zpaq because it provided good compression with the old system using lrzip -z and because ...
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0answers
20 views

create AVC_Intra from uncompressed in best quality

I have some 720p uncompressed YUV video and I need to transcode this video into an AVC-Intra using the best possible quality. The best possible Quality is needed, because the video probably will be ...
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1answer
1k views

Hide NTFS compression blue double arrow icon overlay

Since the last Windows 10 update I have these blue double arrows on almost every item (all files & folders that are NTFS compressed). How can I remove these?
0
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1answer
13 views

Mac - Alias linking breaks after unzipping the folder

I am new to Mac. I am trying to zip a folder in which there are two sub folders say folder A and folder B. I create an Alias of a file in folder B and move the Alias to folder A. After I create a ...
3
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1answer
60 views

Remove any file that is not a folder

I have a complex directory in my work and another person needs it's structure. Having so many directories, instead of manually documenting, he insisted just duplicate that folder, then remove all the ...
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0answers
17 views

windows curl --compressed : unrecognized command

I found the SAME problem: (si I know it can be duplicated) Curl Compressed Command not Recognized in Windows However no one of these solutions works for me (win7 / 64bits) When I use without the ...
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0answers
17 views

Perform a compressed backup of encrypted devices?

I'm looking for software that would do something like this for me: Read disk's partition table, find LUKS-encrypted partitions, Decrypt the partitions, fill the empty space with zeros, Back up the ...
0
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1answer
140 views

How to recover files from the compressed NTFS partition?

One of the NTFS partitions was compressed with the tool implemented in Windows 7, available in the partition properties window. Later, one of the folders has disappeared. I was trying to use Piriform ...
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1answer
33 views

How do I email folders containing multiple documents?

I have a folder with 6 documents in it. If I try to email the folder, my emailer will not accept it. How do I work around this?
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1answer
37 views

Photoshop saves images larger than they were before

For some weeks I am wondering why jpg files I save with Photoshop are extremly big like a 300 x 300 image is around 600 KB even when I reduce its quality all the way down to 0. Its all in RGB 8 Bit so ...
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0answers
72 views

H.264 bitstream parser [closed]

Are there any open-source H.264 bitstream analyzers/parsers which provide slice and macroblock level information (such as motion vectors and DCT coefficients). I'm only aware of the tool called ...
1
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1answer
95 views

compress file using command line windows

I am looking for a command line command to comress a file. I want to compress each file individually to filename.zip. all the methods that I found including: ...
0
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1answer
39 views

7zip tries to compress files and folder outside of the path

I use the command line of 7zip, 7za, to compress a folder, on Windows web server 2008 R2. 7za.exe a -tzip -r %nome_file% "C:\inetpub" I expect it to compress everything inside the folder "inetpub, ...
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0answers
81 views

Does any linux disk format support transparent folder compression? (Like NTFS)

I feel like I could use transparent, seamless folder compression. One way to achieve this, I think, is to compress normally, and mount an archive with Nautillus. AFAIK. you can run programs from the ...
0
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1answer
51 views

disable Compress old files checking in Disk Cleanup in Windows XP

On an OS drive with approx 168K files, 27K folders of approx 28GB, that include OS (Windows XP SP3), drivers and a bunch of large applications such as Visual Studio, MS Sql Server, MySql, Java, ...
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0answers
43 views

How to get uncompressed content when using recursive wget?

i am downloading many single pages with all static content (js, css, imgs...) via wget recursive. It showed up, that served content, which was compressed (gzip), is stored by wget in compressed form. ...