Compression decreases the size of data.

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2answers
378 views

How to further optimize PDF filesize?

I've been combining PDFs into a single file with Acrobat X Standard and have been able to get a 30-page document down to ~8MB. I've been seeing numerous similar documents that are just as, if not more ...
1
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0answers
197 views

Compress files on Windows Server 2003

Duplicate Questions How to compress files with batch file? Using compact.exe didn't do what I wanted. I'd like to have an archive file created so that the files can be retrieved. This is ...
39
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4answers
38k views

How to specify level of compression when using tar -zcvf?

I gzip directories very often at work. What I normally do is tar -zcvf file.tar.gz /path/to/directory Is there a way to specify the compression level here? I want to use the best compression ...
0
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0answers
77 views

Achieve mp4(x264) compression of Debut Video Capture in Sony Vegas

I am using Debut Video Capture software to record my screen (948x534px in mp4 h264 encoder with Ratefactor of 28) and afterwards I edit those clips and render then in Sony Vegas. My problem is that ...
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0answers
66 views

Re-zip archives with the compression level “No Compression”

I am running Windows 8.1 Enterprise x64. I have a folder containing hundreds of ZIP archives (aka Compressed folders). I need the fastest way to convert them (preferably, in-place) to vaild ZIP ...
2
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1answer
45 views

Windows 8 - Compress Drive did not continue after cancel/reboot

I checked the "Compress Drive" option on an external drive (1TB) on Windows 8. After clicking OK, the OS started to compress the files folder by folder on the drive. As it took too long, I shutdown ...
4
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2answers
94 views

How can I specify the order files should be compressed in 7zip?

I have a set of files I would like to compress that I know to be repetitive and compressible, but 7zip chooses a non-optimal order to compress the files and fails to take advantage of their ...
0
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1answer
364 views

How to extract multipart rar with missing parts?

I have a multipart .rar archive containing a single .tar.gz file inside it (don't ask why, that is just how it was made). I am missing a few of the parts, but do have the first part. I would like to ...
0
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1answer
60 views

Why does ColorSync compression increase PDF file size for me?

I have this ebook that I'm trying to send to my Kindle from my Mac. I've done this before; Get a pdf, send it to Kindle address, and make sure the subject is "convert". This causes Amazon to convert ...
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1answer
1k views

How to get compressed memory back in OS X 10.9 Mavericks?

I followed the suggestion to disable compressed memory, now I want to get it back. I checked the code, it was 4 before disabling. So, I tried: sudo nvram boot-args="vm_compressor=4" That was not ...
0
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1answer
163 views

How to convert DV to robust compressed video file for editing later

I have 60Gb of DV footage that I need to store, but 60Gb is WAY too big. I need to transcode it to a lossy format, but I need the resulting video to be robust such that it can be easily edited with a ...
0
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2answers
29 views

What could have gone wrong when compressing a very big directory on OSX? The resulting zip won't decompress

When working with the edition of a movie, I was out of space on my HD so I temporarily compressed a very big directory to a zip file and removed the original as a way to get some extra space. I did it ...
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1answer
77 views

How to convert a file of format tar.gz to tar.bz2?

Like the title says, how do I do this conversion from the Linux console?
5
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8answers
4k views

Winrar-like archive utility for OS X

I've been a Mac user for about 1.5 years and so far enjoyed the experience. But one thing I miss from other operating systems is the lack of compression/decompression utilities that follow the ...
7
votes
2answers
298 views

let tar auto detect compression type when extracting from stdin

I use GNU tar. It can auto detect compression type when compressing/decompressing files. But I need to decompress an archive from stdin and the compress type is unknown. I noticed that tar can give me ...
53
votes
6answers
15k views

Compress and then encrypt, or vice-versa?

I am writing a VPN system which encrypts (AES256) its traffic across the net (Why write my own when there are 1,000,001 others already out there? Well, mine is a special one for a specific task that ...
3
votes
3answers
935 views

Disable Windows 8.1 Component Store (WinSxS/DriverStore) automatic compression?

Windows 8.1 has a new Scheduled Task (Servicing\StartComponentCleanup) which will automatically delete or compress superseded and unused files from the Side by Side store, DriverStore and drivers ...
8
votes
4answers
3k views

How can I compress a file on Linux in-place, without using additional disk space?

I've got a 100GB drive that has a 95GB file. I need to free up some space on the drive (and right now transferring the file off the drive is not an option). The file would compress well with gzip or ...
0
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1answer
168 views

Force all files in a NTFS compressed folder to automatically compress [Windows]

Is it possible to keep all the files within a NTFS-compressed folder compressed? For example, if I have a compressed a folder using NTFS compression, it will compress all the files inside the folder ...
0
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2answers
63 views

How to Undo the “Remove Unnecessary Blank and EOL” in NotePad++

I am using Notepad++ for my coding , just used the their Edit > Remove Unnecessary Blank and EOL feature to remove the space and tabs and compressed the code , but how do i UnDo it ? is there ...
4
votes
4answers
789 views

More efficient file compression program for many identical files?

I am doing a backup of my work and I'm looking for a program that can more efficiently compress files. The windows default compression program works fine, but it doesn't work as "smart" as i would ...
4
votes
3answers
2k views

Recursively unzip files where they reside, then delete the archives

I goofed up a setting on the backup software I use. Normally I would have the files from a network share get loaded into a spare drive, compressed into zip folders, then sent off to the offsite hub. ...
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0answers
174 views

compressing video with ffmpeg while maintaining high frame rate

Update: I watched the output video on a different machine and it was fine. The issue must've been with the program I was using to watch the video. Nevermind. I'm trying to compress videos taken with ...
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1answer
2k views

Between xz, gzip, and bzip2, which compression algorithim is the most efficient?

Between xz, gzip, and bzip2, which compression algorithm gives the smallest file size and fastest speed when compressing fairly large tarballs?
0
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0answers
52 views

Unzip speed on Mac versus Linux

I have a zip file that contains 200mb of data, compressed to an 80mb .ZIP file. Basically it's a website with thousands of files, including code and images, no video. The file was zipped on a linux ...
0
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0answers
205 views

Stream videos from a server with “youtube-like” compression

I would like to host some videos on a site for a small audience (under 50 people), and don't want to use a site like YouTube or Vimeo, however I would like to have the same kind of load speeds for the ...
4
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1answer
327 views

Avoiding extreme fragmentation of compressed files on NTFS

Problem explanation I'm storing windows disk images created with wbadmin on NTFS drive, and I found compressing then with NTFS compression gives 1.5-2× space conservation, still giving full ...
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1answer
262 views

how to remove full path when doing tar.gz compression

I'm using this command to archive a directory named g from java code: tar czf /a/b/c.tar.gz /e/f/g When the tar file c.tar.gz is created, I find an entire path e/f/g then all files of the g folder ...
0
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0answers
19 views

Windows compressing big file automatically

I have a NTFS shared partition (for my Fedora and Windows 8 installations) and a big truecrypt container on it (not the whole partition). I have no problem mounting this container from Linux, but ...
2
votes
1answer
275 views

How do I find out the compressed / uncompressed file sizes on btrfs?

I am using btrfs on one of my hard drives. I would like to know the actual file size and the compressed file size on btrfs. I am interested in seeing the compression ratios per file . For example ntfs ...
2
votes
2answers
875 views

How do I unzip a file with PPMd compression: I have the error “PPMd method not supported”

Ubuntu/Windows 7 user here, I have a zip file that I am trying to extract. In windows I get an error. In Ubuntu, the archive manager I get a "PPMd method is not supported" I read about 'e', a ...
0
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3answers
4k views

How to compress / reduce the size of JPEG photos for archiving? [closed]

I have 50,000 high resolution JPEG photos, where a couple of them might occasionally be needed, about once a year. I wanted to zip them to save disk space, except that zipping gives no space benefit ...
0
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0answers
37 views

How do I join, decrypt and uncompress my backups?

This is the line I used to back up some files for f in "*"; do tar -ch "$f" | pv | xz -9 -v |openssl des3 -salt -k “mypassword” | split -a 4 -b 200m – “/backups_${f%}.tar.xz_” ; done Now I am ...
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votes
2answers
348 views

Looking for a way to compress, encrypt, split, and upload data on Linux for backups to multiple clouds

As the title says, I'm looking for a way in Ubuntu/Linux to compress, encrypt, split, and upload data for backups across multiple clouds. I have grabbed multiple cloud accounts for free ranging ...
6
votes
9answers
1k views

How to compress a huge amount of PNG images?

At work, on certain projects I have to manage a lot of images. Most of the time PNG files work the best for what I'm doing. With such a huge amount of images, I've tried using PNG compression with ...
3
votes
1answer
87 views

Is there a way to compress files at different compression levels inside a single 7zip file? [duplicate]

Some files are compressed using their own compression scheme and some aren't. If I try Max compression on an already compressed file, I'll get 1%-2% better compression at most. The amount of time ...
5
votes
1answer
159 views

How to exclude a folder in 7zip?

I want to compress the folder C:\Temp but without a specific subfolder (e.g. C:\Temp\test). How can I do that with 7zip? I've come up with the following command: c:\Temp>7zip a -t7z test.7z ...
1
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2answers
504 views

Is there a way to determine the original size or file count of a 7-zip archive?

I know that when I compress an archive with the 7za utility, it gives me stats like the number of files processed and the amount of bytes processed (the original size of the data). Is it possible, ...
1
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0answers
229 views

Increased data usage on a VPN connection

I have been working on a remote computer over a VPN connection using Windows 7 Remote Desktop Connection. I RDP from my laptop (with non-HD display). Recently my wife has also been working from home ...
0
votes
1answer
29 views

Strange behavior encountered while using tar

I had a folder of useless C programs for a project. When I was compressing it using tar, I kept using tar -cvf c-project and then realized I'm setting the flag for the file name and I'm giving ...
0
votes
1answer
247 views

I am trying to zip files individually, but the file type is unknown

I am trying to zip some files with an unknown file type individually. I am using the following code in a batch script to do that: @ECHO OFF FOR %%A IN (bestbuy*nat*component.cpi*) DO "C:\Program ...
2
votes
1answer
48 views

How do I reinforce compression options?

Shortly after I got my computer, I enabled NTFS compression on it, selecting the option to compress "all files and subfolders". I recently noticed that several folders on my PC are not compressed ...
0
votes
1answer
65 views

Extracting one file from archive: 7-zip requires decompressing entire archive?

I've noticed that when browsing an archive containing multiple files with 7-zip 9.20 Windows GUI, extracting one file for previewing takes significantly longer with .7z than .rar archives. With .7zips ...
2
votes
2answers
309 views

What does the number after 7-zip's -m switch mean?

7-zip has a command line switch to set the compression method, -m followed by a number, e.g. -m0=LZMA. What does the number (0 in the example) mean? Different numbers produce slightly different ...
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0answers
91 views

How to make compact.exe to compress only folders, but not files?

I have a large and complex nested folder structure on disk. Say, Folder1 <many files> Subfolder1 <many files> Subfolder2 <many files> ... SubfolderNNN Compressing all ...
2
votes
1answer
91 views

tar: compress only the contents of a folder

I have to compress only the contents of the folder, not the folder with tar, there is any argument for that? I have search but I don't find anything. Example: mainfolder/ asd1 asd2 ...
0
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1answer
193 views

zip sub folders individually

can anyone help me make a batch file for my problem. i have multiple folders that i want to compress individually. root folder 1 file 1 file 2 ...
0
votes
0answers
67 views

Zipping multiple folders individually

I have a problem zipping multiple folders individually. I saw that you can do that using Winrar. I have managed to do it. But here is the problem: When you extract the archive made by Winrar, it ...
0
votes
1answer
55 views

Human insensitive video compression

I have an AVI video file recorded by my laptop web-cam. It's only 10 minutes but it has so large size, 3.9 GB! I'm not expert in multimedia but I've seen really good quality long movies in only 4 GB. ...
1
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2answers
160 views

Check if HTTP calls are gzipped

Assuming that I have an application server (Linux) running on port 80, how can I make sure (with tcpdump, I guess) that all incoming requests are gzipped and all responses are gzipped as well? Also, ...