Compression decreases the size of data.

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92 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. ...
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1answer
89 views

NTFS File Compression Issue

I have several hundred photo files that were inadvertently moved from a Windows NTFS formatted, compressed external drive, to a second external drive that was formatted by Mac OS X. The move was ...
0
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1answer
71 views

Video compression size s and codecs from JPEG

I am building a data logger with 3 cameras which output as jpeg frames (o.79MB/jpeg @24bit/pixel) at 24 frames per second. I want to take these images and convert it to a video. Each For the video I ...
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0answers
11 views

pak.ngc files? How to axxess

Used the filesystem on Wiiscrubber to pull out the whole file partition which contained many model files but they are embedded within a file type that hasn't been widely asked about at all. All I am ...
0
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1answer
683 views

How to compress an .avi video to 10% of its original size using ffmpeg?

I have a video file that is 15 seconds in length and 465,195 KB. I would like to reduce it to somewhere around 46,000 KB. Is there an easy way to do this. I have tried the largest allowed bitrate ...
0
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1answer
256 views

how to set automatic NTFS LZX compression on new files

I know it is possible to compress files on the commandline with LZX: COMPACT /C /S:E:\Backup /EXE:LZX But i would like to do that BEFORE the files gets written on the disk. If i enable compression ...
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0answers
40 views

Why is zip default compression on Mac [closed]

Mac is based on Linux so why would it use zip as default compression, if zip stores MSDOS file attributes. Which is more efficient - tar or zip compression? What is the difference between tar and ...
0
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1answer
47 views

using compressed (.gz) files with command line scripts expecting uncompressed files

In order to save disk space, I've gunzip-ed a lot of my files that I regularly use. What is a best-practice way to still use the .gz version of these text files with, say, python scripts? More ...
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1answer
966 views

Zip/unzip my directory on windows 7 cmd

I want to zip a directory containing many types of files and many sub-directories in it. I tried: compact /c file But I did not see anything. Next I found about zip/unzip command and tried: zip ...
0
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1answer
27 views

An archiving strategy that will allow me to view file contents without uncompressing to disk

I am running in Unix. I have a folder, which has a set of folders and text files under it. I wish to archive this into a single compressed file. However, through standard Unix commands, I'd like to ...
2
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1answer
23 views

Does any version of Windows support uncompressing splitted archives natively?

I mean, are multi-volume .zip archives, or maybe any other kind of archive format, natively supported without any third-party application like 7Zip or WinRAR?
0
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1answer
725 views

Recursively compress files in a directory and subdirectories using command line “zip” tool in Mac OS X and exclude .DS_Store files from ALL subfolders

I'm trying to create a ZIP file using the command line zip tool that comes with the Mac OS X Terminal. I want to recursively compress the contents of the current folder but excluding .DS_Store files. ...
1
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1answer
148 views

How do you know the size of a 7zip compressed file?

With an archive file, I can only ever find the size of the file before compression, its original size, which I know. What about the size of the new, smaller compressed size?
2
votes
1answer
132 views

NTFS compression ate all disk space with no possibility to recover

To increase available space on a HDD (Windows Server 2012 Standard x64), I tried to enable NTFS compression on that drive. While doing the compression, it ran out of available space (despite having ...
2
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0answers
43 views

Zipping a text file with sha256 hashes seems too efficient

I have an ASCII-encoded text file where each line has the following structure: XYplorer nn.nn.nnnn [yyyy-mm-dd hh.mm.ss] [S256 S256].zip ↑↑ ↑↑ ↑↑↑↑ ↑↑↑↑ ↑↑ ↑↑ ↑↑ ↑↑ ↑↑ ↑64× ↑64× so a ...
0
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1answer
285 views

7zip: compress and copy to destination folder

I am trying to do the following: command line compress a file from C:\TestFolder\file.txt (source location) and on the same command or bat file put that compressed file in (a destination folder) C:\...
0
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1answer
53 views

How to search for a file that is compressed on a external drive from my mac?

My hard drive was from my Mac. I replaced it with a new hard drive. I was able to dump all the data from the damaged drive onto an external drive. The dump separated some of the files into Word docs, ...
0
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1answer
45 views

GPG with tar.gz at the same time without the full path being packed

I would like to compress and encrypt a folder: tar -cz "/path/to/the/folder/" | gpg --encrypt --passphrase "password" --recipient "mail@mail.mail" > "/destination/package.tar.gz.gpg" When I ...
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0answers
41 views

LAME doesn't compress MP3 anymore

(I'm running Ubuntu 14.04) Until a while ago the following command used to work fine for compressing MP3 files: find . -iname '*.mp3' -exec sh -c 'lame -b 160 "$0" "$0"-160 && mv "$0"-160 "$0"'...
2
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0answers
133 views

Disable memory compression in Mac OS X for specific application?

Is there any way to disable the memory compression in Mac OS X for a specific application? I read how to disable it in general at Disable compressed memory in Mac OS 10.9 Mavericks? , but in my case ...
0
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1answer
37 views

How to compress an encrypted partition or drive in Windows?

Could someone let me know is there any effective way to compress an encrypted drive or partition in Windows to reduce its size ? Thanks
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1answer
246 views

How can i compressed(winrar) a file using command prompt and the file name of the .rar is the same with the file

i have a autoback.bat file that will automatically backup my database and compress in using winrar application. the problem is i cannot create a rar file that is the same filename of my database. for ...
3
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0answers
227 views

Possible bug in 7zip - empty folders extract as empty files

I have a directory structure as follows: Main | |--empty_folder | |--folder | |--example.txt I'm zipping it using the .NET ZipFile.CreateFromDirectory method (but I doubt this has anything to ...
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votes
1answer
164 views

Why youtube compression algorithm doesn't work well for Minecraft videos?

Minecraft videos have very small entropy : I can play hours to minecraft online exchanging only tens or hundred MB of data with the server, this is an entropy upper bound for Minecraft videos. However,...
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2answers
596 views

What happened to .gzip option in 7-zip?

I am not sure if this is just a coincident or not but I have recently upgraded my OS to Win 10. I noticed only now (after the upgrade) that the .gzip archive format is not available in 7-zip anymore....
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0answers
50 views

How to change context menu option for 7zip?

I work a lot with .gzip format and I am wondering if there is a way to change the default "Add to" format in the context from .zip to .gzip.
1
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1answer
82 views

how to achieve same compression in linux and windows

I have a example.jar file. I'm trying update a class file in the jar. when I'm packing the class file using jar or zip utility(command line-linux) I tried : jar uf my MyJarFile.jar ...
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0answers
37 views

Why am I encountering 'Error decoding stream footer' when decompressing using `pixz`?

I compressed a file using tar -pcv input_dir | pixz 8 -p8 > output.tar.xz. When I try to decompress or list the files using pixz -d and pixz -l i encounter the error Error decoding stream footer. ...
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1answer
24 views

decompress multiples pdf files without using tmp files?

I have more than 100.000 pdf files I want to decompress it, then recompress theme all in one archive file to save space. all i found is: ls | xargs -P 4 -n 1 -I {} qpdf --stream-data=uncompress {} /...
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2answers
117 views

To open lrzip-compressed in Debian 8.1

I downloaded the SageMath jessie package here but I cannot open it. I get the warning in ArchiveManager Could not open this file type There is no command installed for Tar archive (lrzip-compressed) ...
8
votes
2answers
5k views

How do I use the Google data compression proxy on Firefox?

I am using GNU Icecat (GNU version of Mozilla Firefox) on Trisquel GNU/Linux. In order to minimize/optimize data usage while web surfing, I want to use Google's data compression proxy. So, how do I ...
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1answer
82 views

rar - command line switch for exclude compress but store?

Assuming I have few files like : --- +Royi | +---1.txt +---2.txt +---3.Avi +---4.mp4 +---5.docx looking at : rar a -r -m1 Royi myArchive.rar This will shrink all ...
0
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0answers
103 views

Why is none of my Mac memory compressed?

I am constantly up against the 16GB physical memory barrier on my mac. I have looked in Activity Monitor and ZERO memory is compressed. I would like to have OS/X be aggressive in compressing - how ...
2
votes
1answer
1k views

Compress large CSV FIle? (500MB)

I have a CSV-File which is 500MB of size. I am searching for a way to compress is to it smallest possible size. I actually received the file back then in a ZIP-Folder which was only about 50MB of ...
0
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0answers
147 views

What are all parameters to get the highest compression ratio for animation from ffmpeg x265?

Ok. I'll use -crf 51 (-crf 61, -crf 10 or any other), -preset placebo, -keyint=-1 (only one keyframe in the start). -allow-non-conformance (I am not sure if this is work with libx265). -ref 16, -...
0
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1answer
100 views

How do I zip files with the same name?

I'm on a Mac OS X 10.10.4 I need this: Detecting files with the same name, but different extension. (aaa.ai, aaa.eps, aaa.pdf and bbb.ai, bbb,eps, bbb.pdf and so on) Compressing those with the same ...
0
votes
1answer
80 views

Which level of compression should I use a .iso file [duplicate]

I have a .iso file on my hard drive (on a windows 8 pc) and it is really big (something like 16 GB). I was trying to compress it (using 7-zip) so it could fit on a DVD-R. But when it finished ...
2
votes
2answers
316 views

How to compress extremely large file in place

I need to compress a 646.4GB file on a 1TB external HDD. This HDD currently has about 238.6GB free. However, since the straightforward compression methods create a new file, I'll not be able to ...
0
votes
4answers
214 views

How to open tar gz file created using tar piped to gzip

I wanted to generate a tar gz file with the highest compression level, and I followed the solution from http://superuser.com/a/546509/461740: tar cv /path/to/directory | gzip -9 > file.tar.gz ...
0
votes
1answer
2k views

.zip corrupted on Mac

I've got a .zip file of approx. 20GB. (20,497,570,063 bytes) I am trying to uncompress it but both Archive Utility and Terminal are failing to do so. Archive Utility is giving error 2 (no such file ...
2
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0answers
66 views

Unzip .gz file when line order is important

I am trying to unzip fastq.gz files and then analyze the sequencing data within them. However, later analysis is dependent on preservation of line (line 1 from zipped file must be line 1 in unzipped ...
0
votes
1answer
64 views

Unix gzip more than one file at once

I have come to the end of my research with unix:> I'm new with unix and its enviroment, so i need your help guys. Long story short, i have a housekeeping script, which runs daily/weekly (it doesnt ...
2
votes
1answer
907 views

“Compress contents to save disk space” option not available for one partition

One of the partitions on our Server 2003 R2 server recently ran out of free disk space. After freeing up a significant amount of free space (20 GB, which only corresponds to 1.37% of the partition - ...
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votes
2answers
113 views

What kind of image compression causes this color banding? [closed]

I have two images. The first is before undergoing lossy compression: Picture #1: The second is after undergoing lossy compression: Can anyone explain to me what is going on here? How does this ...
0
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1answer
93 views

NTFS Compression on multiple folders

I have been tasked with compressing certain folders on a network drive. The drive is formatted NTFS on a Windows Server 2008 R2 machine. The folders to be backed up are all called "Backup", and are ...
1
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1answer
330 views

7zip Batch Compression for a specific file extension in different folders

I've already learn how to batch compress my files as-is with 7zip but I have something more complex need on this issue. Maybe I can explain my needs with this scenario; I have a backup folder of my ...
0
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1answer
77 views

No 'Compress this drive to save disk space box"

I have two external hard drives, both with NTFS, one of them allows me to compress it, the other doesn't, why? https://goo.gl/photos/AqV5V42dEY5N2o569 I deleted titanfall and bf4, freed up some ...
0
votes
1answer
113 views

Jpegtran made images bigger

I ran jpegtran on a bunch of images as such: $ jpegtran -copy none -optimize Most of them were reduced in size by a lot. But some of them actually increased in size. How can that be?
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1answer
220 views

Determining Cause of Unexpected Shutdown on Windows 8.1

I left my computer unattended a little over half an hour while it was compressing some files. I came back, and my computer had apparently shut off. I looked at the Event Logs, and it told me that The ...
0
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1answer
51 views

Windows 7 compressing doesn't reduce space [duplicate]

I used the compression method by windows 7 from the properties of a file but it doesn't seem to work. The folder that was around 42,6 Gb is now 42,5 Gb which means it only saved me 100 MB? Is there ...