Questions tagged [compression]
Compression decreases the size of data.
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Archive expansion from a USB [closed]
A: mv usb/archive . && xip --expand archive
B: xip --expand usb/archive
I/O speeds
Size of the archive
tA tB
It seems that there isn't an absolute answer for 'which one is faster'. How can ...
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Can you unzip multiple password protected compressed files at once?
Is that possible in winrar or other application? If not, is there a way to bulk unzip all the files at once without having to input password? Thanks.
Jason
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Why might I not be able to delete a file from an unextracted zip folder?
I have a zip folder (40-50GB) that contains a set of data files and a single (1 KB) .ahk script. The .ahk script was used to unencrypt the data files in a folder before creating a zip of that folder ...
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Automating image compression in Chrome with PowerShell and AutoHotkey
I want to automatically compress images I download through Chrome. As a superuser-in-training, I have tried using PowerShell but need further guidance. Additionally, I almost got AutoHotkey to work ...
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Cannot enable NTFS compression on a 18TB HDD
When I had my 18TB drive filled I noticed I could not enable NTFS compression because the function was grayed out. I followed the directions here "Compress contents to save disk space" ...
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How to extract individual macroblock types and their corresponding motion vectors
I need to make a pair for each macroblock from a frame of a video containing its type and motion vector.
I extracted motion vectors by using the python module of mv-extractor.
For macroblock type I ...
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What compression options does 7Zip use when you add files with a drag-drop?
When you create an archive with 7Zip, you get a dialog showing you a bunch of compression options. However when you drag-drop some files into an already-open archive in a 7Zip window, you just get a &...
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Is there any way to compress uncompressed raw photos (NEF)?
According to Nikon, the NEF format supports lossy, lossless or no compression (there's a setting in newer cameras). What I have is a terabyte of NEFs from an old camera which are uncompressed. Is ...
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Unable to decompress Password Protected Zips
I used Coolpad Note 3 lite with Android version 5.1 (lollipop). Using system's stock file manager I compressed many important files and made password protected zips & password protected nested ...
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Similar VHD(x) files compression
Recently I am organizing my storage backups and convert them to vhdx for boot them from hyper-v.
But now I notice all of those vhd files contain same content like OS and user's documents with slightly ...
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Is image file of bit depth 24 stored as 32 or 64 bit for Windows 10 64-bit (operating system)?
I need help to calculate compression of a PNG file in Windows 10 64-bit operating system.
Formula is raw data size = image width * image heigth * (bits per pixel / 8).
Comment from the author of above ...
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How to delta compress audio track file , video tracks file, full webm file into one zip file?
Using yt-dlp -k https://youtu.be/33BT7KIZwTY,
I downloaded audio and video files and obtained a merged webm file.
After running the command, there are three files:
youtube originals [33BT7KIZwTY].f251....
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is JPEG artifact in any case unavoidable when increasing image size?
When I increase the image size to 200% or higher , the JPEG artifacts (ugly dots around sharp edges) are clearly visible. Same goes for PDF files that are lossily compressed.
Are there no compression ...
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Zip file compression failed “output file write failure, your disk could be full” even though I have enough space
I want to compress a 45 gb file with zip, but it says “output file write failure, your disk could be full” after about 20 minutes. I have another 4 terabytes of storage left.
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How to get Windows 10 send to compress all folders that start with a period/dot?
I saw a similar question for Windows 7 but my question is for Windows 10.
In Windows 10, if you right click on a folder and use Send To > Compress, the ZIP file will not include all of the folders ...
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Is there a way to get YouTube compression inside Premiere Pro?
Trying to export small file size in Premiere Pro
Here are my params:
Preset - Custom
Format - H.264
Frame size - Custom - 640 x 360
Frame rate - 29.97
Field order - Progressive
Aspect - Square Pixels(...
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ImageMagick Mogrify Compress Images Recursively
Windows 10. ImageMagick v7.1.0-62
I need to compress and optimise a lot of .jpg images using ImageMagick. I am using the following command, which is working (this overwrites the original files which ...
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How to stretch a wav file to a specific number of samples?
How do you convert the content of a wav file to a specific number of samples, but without adding any silence? I.e. how can you stretch the audio data to a certain number of samples?
Some background ...
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Automatically compressing files on file server
I left the title intentionally vague, because I don't care about using specifically FTP or gz if any other tool will work better.
I have a lot of data that I access very rarely (movies I watched, ...
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Why does changing a source file's name affect the size of its compressed version?
Using gzip on CentOS 7, I just compressed a source file into a .gz file, then I found I got the source file's name wrong, so I changed the source file's name and compressed it again, and interestingly ...
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Find log files under multiple directories and compress each file with its own name and date
I have multiple directories like below and I want to compress each file in place.
/var/dir1/logs/logfile.log
/var/dir2/logs/logfile.log
/var/dir3/logs/logfile.log
I want to use find and tar with ...
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Loop through folders compressing subdirectories and renaming after parent folder
I have a directory of folders as follows:
ABC-2000-001-01.pax
|_FolderA
|_Files
|_FolderB
|_Files
ABC-2000-001-02.pax
|_FolderA
|_Files
|_FolderB
|_Files
ABC-2000-001-03.pax
|_FolderA
|...
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Can I search and edit zipped files without first decompressing?
I know that windows 10 builtin file explorer supports this if I check "include compressed files" in file explorer settings. But it's too slow if there're a hell lots of zip files to search ...
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Confusion about NTFS compression and `du` on ZFS (was: How to *really* disable NTFS compression?)
I am using ZFS with compression+dedup on my host system and use Qemu/KVM for virtualization. I wanted to let ZFS do it's job and disable Windows 10's NTFS compression feature (both, CompactOS and NTFS ...
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zip: set minimum deflate percentage
I want to create a zip file that will be decompressed by a low-power cpu
Deflate compression decreases the filesize, but adds to the decompression time.
The zip command seems to do some analysis ...
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Recursively compress mp4 files (actually ts) with ffmpeg in the same subfolder
I have a root directory which haves a lot of folders, and inside those more folders. There are no real structure, just a bunch of folders with some having a mp4 file inside. I would like to compress ...
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Increase robustness of 7z LZMA archiving?
I create backups of several PHP projects like Wordpress etc, which contain a huge amount of small files. Hence I zip them into one archive to make transfering and checking the file easier / faster. I ...
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Is there a way to choose between single-thread and multi-thread compression in 7z command line tool?
Is there a way to choose between single-thread and multi-thread compression in 7z command line tool?
I want to be able to make the choice so that a process that's meant to run in the background with a ...
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Dovecot expunge all emails marked as deleted regardless of folder
I have asked the following question elsewhere on StackExchange, and I was pointed here as the best place to ask the question.
The response said that I need to use doveadm which is what I expected. ...
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compressing media files while preserving metadata
I have tons of phone media backup, and I want to reduce their size by compressing them.
For example compressing video files by encoding them to x265 codec, and for the photo files to lossless JPEG, ...
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Compression Enabled, smaller IS expected, BUT 3,000 files, Size=25GB but Size on Disk only 5MB?
I've looked & keep finding lots of articles telling me what I already know.
I know the file size difference is because I have Compress contents to save disk space enabled.
I know about the ...
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If FLAC is a file format, how can one software make them smaller than ffmpeg with maximum compression?
While compressing all my FLAC files with the latest version of FFMPEG with maximum (12) compression level, it turns out that some of them become LARGER afterwards.
How is this possible? Even if a non-...
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Is there any hidden danger in re-converting all my FLACs with "-compression_level 12"?
For some time now, I have been upgrading my music library from bad-sounding MP3 files to lossless FLACs. This obviously takes much more storage space.
The 465 GB internal disk which contains my "...
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Prevent GhostScript to turn PNGs into JPEGs
I use GhostScript to fix/repair non-compliant/corrupted PDFs in order to let them be successfully opened by PDF readers and be edited with Acrobat Pro without errors or warnings.
gs \
-o repaired....
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Unable unzip file with the correct password
Before i used command "zip -eq file.zip /folder" to zip my folder with the password. Now I unzip the file with the correct password but always show "Wrong password". I also tried ...
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tar lzma autocompression produces the error "This does not look like a tar archive"
The following script
mkdir test && cd test
mkdir files
touch files/{1,2,3}
tar --create --file "test.lzma" files/{1,2,3} --auto-compress
mkdir extracted_files
tar --extract --file &...
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How to use xcopy to copy files from a compressed NTFS folder to the root of a FAT32 volume?
I am having problems using XCOPY to copy folders and files from a compressed NTFS folder to the root of a FAT32 volume (actually a USB drive).
This looks like a Windows or Xcopy bug to me. The command ...
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mp4 encoded with ffmpeg not displaying on chrome
I am using the command
ffmpeg -i input.mp4 -c:v libx265 -vtag hvc1 -c:a copy output.mp4
in order to compress my mp4 files. This is the output:
ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg ...
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Partition cloning using dd and a compression tool
Following the catastrophe that happened with me recently, I decided to start making backups to my data. I was searching for best ways to clone partitions and disks and came across a question on ...
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How can I optimize an animated PNG (APNG)?
I have an animated PNG that is about 150KB. It’s 24 frames. If I run it through a typical PNG optimizer like ImageOptim or Squash, it turns into a non-animated PNG of 3KB and one frame.
I am dead sure ...
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Copy entire drive in use per batches
I need to copy entire network drive (approx. 1TB) that is constantly in use to a remote location but in that remote location, no file can be larger than 1.3GB.
How can I achieve this?
I cannot first ...
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What is the fastest compressing parameters for 7zip?
My question is simple.
How can I fastest compressing via 7z?
I'm using this and It compresses a 2.5 gb file in about 4 minutes
7z -a -r -t7z -mx1 -mmt=4
Is there any better option instead of -mx0 ...
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The most complete backup of /dev/sdX with dd, tar, gz, xz
What is the most complete way to backup/restore entire /dev/sdX (to/from a file) including device partition table and partition flags, all possible metadata, owners, file permissions, ACLs, creation/...
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Zip encryption, individual files or the whole directory/file tree of the zip archive
As an example fuse-zip shows a directory list, when executed on an encrypted zip archive. The individual files then cannot be read or written to. But the directory tree and the individual file names ...
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How Windows decide whether to use Deflate or Deflate64 for zipping files
Windows Explorer uses the Deflate64 compression method for its zip files, rather than Deflate. Is this behaviour consistent across "current" Windows versions?
I tried one way. I created one ...
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Is there a way to check if something is not in PATH, then conditionally do certain action in CMD?
This works great for downloading 7zr for doing decompression tasks in a batch script if 7z.exe isn't in the working directory.
if not exist "7z.exe" curl -L "https://www.7-zip.org/a/7zr....
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Save and restore file metadata (xdelta, open-vcdiff)
Is it possible to save and restore file metadata (specifically last time modified timestamp) using xdelta/open-vcdiff ? If no, is there any program that would help me to save/restore metadata (windows)...
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Looking to compress just a PGS stream of a video
I have a video stored as an mkv with pgs subtitles. I noticed when I burn the subtitles in with this command hereffmpeg -i "movie.mkv" -filter_complex [0:v][vid];[0:s:1][sub];[vid][sub]...
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How to extract How uncompress .tar.lrz file in centos 8?
I have .tar.lrz file in mac which I have to decompress.
I am trying decomprees file from https://github.com/lin-tan/CoCoNut-Artifact/releases/tag/training_data_1.0.0
I already tried:
yum install lrzip
...
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Pixel Art Gif to Webm
I have a large gif file (100+ MB) and I'd like to convert it to webm to reduce the size of the final file to 10-12 MB. I'm using ffmpeg to do this and it converts the file just fine except the ...
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