Zip Compression Method

For all other extensions, CM_DEFLATE is used. zip skipping: muh unsupported compression method 99 Solution: On linux p7zip will unzip the zip with the password, for fedora: $ sudo yum install p7zip $ 7za x -Ppassword muh. Hi, I have a number of small texts, say 100-1000 bytes. The default compression method will also be used when you create Zip files from the context menu using Add to filename. What is Gzip compression? Gzip is a method of compressing files (making them smaller) for faster network transfers. Choosing a Compression Method. Sometimes helps with "sparse" files. HI All, I've 30 odd zip files that I'm transferring (copy activity) from Azure Blob Storage to Data Lake Storage. The series began with the lesson entitled Understanding the Lempel-Ziv Data Compression Algorithm in Java (commonly known as LZ77). com offers 160 compression zip sox socks products. Introduction. Red Hat Enterprise Linux provides the bzip2, gzip, and zip tools for compression from a shell prompt. zip is the method of compression employed by. zip files Package java. I saved a multi-layer 775 MB image as a ZIP compressed TIFF, and even with four 2. If the compression method for the record is either 0 or 8 (see below), then the uncompressed data associated with the zip file entry. Microsoft's implementation of Zip is Compressed Folders (note, they don't say zip!). Valid values range from 0 to 250, where 0 means use the default value 30. RichyA, thanks for the info. When salary compression and the policies that enable it are sustained over several years, it can be demoralizing and lead to widespread dissatisfaction. All of the archive and compression formats in this chapter — zip, gzip, bzip2, and tar — are popular, but zip is probably the world's most widely used format. It provides better multithreading support than LZMA. Duplicati Version: 2. Its intent is to provide. The current version of 7-Zip offers a total of six compression levels: Store, Fastest, Fast, Normal, Maximum and Ultra. LZW compression is also suitable for compressing. 7z is a compressed archive file format that supports several different data compression, encryption and pre-processing algorithms. Base image properties (size, colours) were retained. Originally designed for ripping DVDs, it is the most popular tool for creating H264 video from any video file or DVD disc. The 7-Zip program is publicly available under the terms of the GNU Lesser General Public License. 7-zip requires more memory to compress files as compared to other tools but if your. There is another way to compress/ Zip a file in Windows 10 i. Compressing Files at the Shell Prompt. If allowZip64 is True (the default) zipfile will create ZIP files that use the ZIP64 extensions when the zipfile is larger than 4 GiB. zip The default compression method will be used if no compression method was specified for. Microsoft's implementation of Zip is Compressed Folders (note, they don't say zip!). Create zip without compression on OS X from Terminal: zip -r0 zipfilename. This is a significant improvement over noncompressed voice (64 Kbits/sec) and older compression techniques yielding 32 Kbits/sec. Compression, first with LZ77 and then with Huffman coding. GZip GZip uses the same parameters as Zip, but GZip compresses only with Deflate method. 7-zip Compression Comparison. Take files out, put files in. ZipException: invalid compression method I am having some issues in dealing with zip files on Mac OS X 10. "ZeoSync has announced a breakthrough in data compression that allows for 100:1 lossless compression of random data. 1kHz, which gives a frequency response up to 20kHz. RAR (or is there a better file compression method)?. As far as I can tell, you can use the code in the library freely in your programs without paying a cent in royalties. The only method not supported is method 10, which is known as "DCL Implode. Many thanks spiceheads. LZMA2 Default compression method of 7z format. Hi Marcus, 7-zip is fairly simple to use. By continuing to use this site, you are consenting to our use of cookies. You can choose from no compression (uncompressed), LZW compression, or ZIP compression. I saved a multi-layer 775 MB image as a ZIP compressed TIFF, and even with four 2. Compression image sharing using DCT- Wavelet transform and coding by Blackely method_daisy. Creates a zip archive that contains the files and directories from the specified directory, uses the specified compression level, and optionally includes the base directory. Ultimate ZIP is a high-performance and reliable compression component. 5, we have an extensive support for manipulating. zip: Zip archive data, at least v2. developerWorks blogs allow community members to share thoughts and expertise on topics that matter to them, and engage in conversations with each other. -Z cm --compression-method cm Set the default compression method. 71_canary_2017-07-04 Operating System: Windows 7 64 bits Backend: Bug description. Compression has become critical in the move to combine voice and data networks. Usually, 7-Zip compression ratio is 30-70% better than zip format. Closes the current entry if still active. What you've got there should give very close to best results. This wikiHow teaches you how to compress a photo to make it take up less space on your hard drive. dotnet add package System. I've tried using the "Right Click; Extract All" and also tried "Selecting & Dragging" the individual compressed files out of the xxx. Valid values range from 0 to 250, where 0 means use the default value 30. This is done for each block. For our example of 7-Zip compression, we have compressed a Open Office 2 installation, which is a open source office suite. From there, all you have to do is select your files and use either the Send To menu or the Ribbon. If zlib is available, the compression mode for individual files or for the archive as a whole can be set using zipfile. That's because of its almost universal use on Windows, but zip and unzip are well supported among all major (and most minor) operating systems, so things compressed using zip also work on Linux and Mac OS. Using these classes you can create new Zip files, open and modify existing Zip files and extract the contents of Zip files via code. Let me know if you have a product that works well for you. The ZIP compression system was (and is) able to archive files in a folder by means of a 32-bit cyclic redundancy check algorithm to compress file sizes. 2 we get an exeption when trying to index a powerpoint file that contains a specific. If zero, Store is used. Specifies how much effort bzip2 should take before resorting to a slower fallback compression algorithm. This makes sense with previously-compressed files such as those in. To expand a compressed folder, we use ExtractToDirectory. ZIP folders. Mike Flugennock (and anyone else who cares) in the same terminal window where you entering the zip command, at the prompt enter “ls filetoprotect. In making a choice of compression method, there are several things to consider, including the type of data you are compressing, your plans for later unzipping the data, and the amount of time you are willing to wait while your data is being compressed. Unzipping a Password Protected File and Error: unsupported compression method 99 Posted on December 5, 2012 by Thomas in Linux , Time Saving Tips Unzipping Password Protected Files on Debian. I have a few zip and rar files that I'm working with, and I'm trying to analyze the properties of how each file was compressed (compression level, compression algorithm (e. HTTP Headers for ZIP File Downloads. At the 'Compression method' field we choose the strength of the compression which will be used. WinRAR supports all popular compression formats (RAR, ZIP, CAB, ARJ, LZH, ACE, TAR, GZip, UUE, ISO, BZIP2, Z and 7-Zip). unknown method. Each thread in the multithread mode uses 32 MB of RAM for buffering. Well, in terms of just compression ability, 7-Zip is the clear winner. Zip files are everywhere, so it makes sense to be able to open them. 7zip compression methods supports encryption with AES-256 algorithm. Folder object can be either a real folder or a zip folder so by manipulating a zip file as if it was a Shell32. public void setMethod(int method) Parameters. The comp is the same as returned by zip_stat(3). Zip compression does something very similar to what you did today with the text compression widget. If you specify {N}, for example mt=4, 7-Zip tries to use 4 threads. Increasing Dictionary size and Word size tends to have minimal effect (maybe about 1% difference) while requiring massive RAM usage increases and slowing the process down. By contrast, the ZIP format is not solid because it stores separately compressed files (though solid compression can be emulated for small archives by combining the files into an uncompressed archive file and then compressing that archive file inside a second compressed ZIP file). For Apache. zip files, and that format is theirs to license. Lossy compression methods include DCT (Discreet Cosine Transform), Vector Quantisation and Transform Coding while Lossless compression methods include RLE (Run Length Encoding), string-table compression, LZW (Lempel Ziff Welch) and zlib. We often do need to convert these zip files into other formats like Rar, 7Zip and many more. IZArc supports 256-bit AES encryption to secure your data. Let me know if you have a product that works well for you. Common lossy audio compression formats work at sample rates between 8 and 48 kHz — and remember that the standard audio CD sample rate is 44. MichaelDigital "Now dig on this!". The documentation currently only describes the file layout format and meta information but does not address the actual compression or encryption of the file data itself. 1 Why does not du report the compressed size?. An efficient, flexible solution for data compression is essential for managing costs and resource demands. Bzip2 compression. This algorithm can be used in ZIP files (using the compression method 10, which differs from the other implode compression method 6 already supported). A ZIPX file is a. ZIP compression library. The compression functionality in DeflateStream and GZipStream is exposed as a stream. How to Use 7-Zip to Compress Files. Both compression and quality refers to the same parameter but one is the inverse of the other (e. If you download many programs and files off the Internet, you've probably encountered ZIP files before. ZIP is a somewhat smarter version of LZW compression. The bzip2 compression tool is recommended because it provides the most compression and is found on most UNIX-like operating systems. What if some of the zip files you made get corrupt during a transfer process. In modern Linux distros these utilities are installed by default. This option is only valid if the Method is ZIP_CM_BZIP2. Deflate64™ is a trademark. If the compressed file is ZIP or ZLIB file, the compression method code is either Stored (0) or Deflate (8). Best Answer: Zip Compression is a method of storing and at the same time compressing 1 or more files in to a single file. WinZip Courier allows you to choose between two different compression methods when it creates Zip files. The current version of 7-Zip offers a total of six compression levels: Store, Fastest, Fast, Normal, Maximum and Ultra. The 7z format initially appeared as implemented by the 7-Zip archiver. It was created by the Joint Photographic Experts Group committee with the intention of superseding their original discrete cosine transform-based JPEG standard. The native part of 7-Zip-JBinding communicates with the java part through the java jni interface and uses the corresponding native 7-Zip interface to perform operations. With CreateFromDirectory, we specify an input folder and an output file. Whether the zip can contain more than 65535 files and/or support files greater than 4GB in size. ZIP and RAR are widely used file formats for data compression. good writing is the art of lossy text compression. It's also used in some old file formats like dBASE/xBase and game files from the 90's (. Several methods have been developed using lossy compression techniques. Following is the declaration for java. Originally designed for ripping DVDs, it is the most popular tool for creating H264 video from any video file or DVD disc. Values other than these will result in no compression taking place. Discover answers on How to Make a Zip File With WinRAR With No Compression. WinRar has an inbuilt functionality which can help you find that. Unzip-online. You know when you you’re working on a project and get stuck on something, so you scour the Web for solutions only to find that everyone else seems to be experiencing the exact same thing. There are few different types of compression you can use in PDF Impress: ZIP: This method is good to use on images with large areas of single colors or repeating patterns. The only problem is - 7-zip is not found by default in all organizations as it is third-party tool. Here are a three compression methods and a batch script to automatically compress folders individually. The default compression method set during a WinZip install is Legacy compression, which will create. Extensions will be converted to lower case. If you have a very fast PC you can choose for a stronger compression, which will result in a more reduced file size. zip files all of the time and Windows users have come to expect this functionality to be present in many applications. tif | grep Compression Compression (259) SHORT (3) 1. This compression system is a very handy invention, especially for Web users, because it lets you reduce the overall number of bits and bytes in a file so it can be transmitted faster over slower Internet connections, or take up less space on a disk. The method of interaction is the same as a folder. The ZIP compression system was (and is) able to archive files in a folder by means of a 32-bit cyclic redundancy check algorithm to compress file sizes. The 7-Zip utility can be used from a command line interface, graphical user interface, or with a window-based shell integration. The bzip2 compression tool is recommended because it provides the most compression and is found on most UNIX-like operating systems. To do this, follow these steps in WinZip 10: Click File, and then click New Archive. When you save a file in TIFF format from Photoshop, you get several options for compression. It relies on Reset-Request and Reset-Ack LCP packets or on renegotiation of the Compression Control Protocol [] to indicate loss of synchronization between the transmitter and receiver. Each letter of the alphabet is coded as a sequence of dots and dashes. Base image properties (size, colours) were retained. The only problem is - 7-zip is not found by default in all organizations as it is third-party tool. down menu below "Compression method" and. In addition to being used for PNG images, it's also used in ZIP and gzip compression. It provides very fast decompressing (about 10-20 times faster than compressing). NET Framework. Compressing Files at the Shell Prompt. WinZip Courier allows you to choose between two different compression methods when it creates Zip files. zip is large. Don't bother with this. A ZIP file may contain one or more files or directories that may have been compressed. " DCL Implode is a proprietary compression. The baseline algorithm, which is. 7-Zip doesn't use analysis in default (yx=5) mode. Bits 1 and 2 are undefined if the compression method is other than type 6. It is signaling an invalid compress method because java. Gzip became the gold standard for file compression in the early 1990s, but if you're still using it 2018, then you may want to consider switching to a newer compression method. Compression --version 4. zip files Package java. zip files I'm not able to unzip a zip file. NET framework 4. Begins writing a new ZIP file entry and positions the stream to the start of the entry data. A ZIP file may contain one or more files or directories that may have been compressed. Candidates. JPEG Compression What it is – When to Use It – And When Not To What is JPEG Compression? JPEG Compression is the name given to an algorithm developed by the Joint Photographic Experts Group whose purpose is to minimize the file size of photo-graphic image files. Does the library support the BZIP2 compression method within ZIP files? Yes. The source directory and the destination file cannot reside in the same directory. FileSystem written by johnnels. 7-zip compression settings guide 1. Setting the compression method to store forces zip to store entries with no compression. For compatibility, the file name field in the Local Header SHOULD NOT be left blank. By default 7-Zip uses x86 filters (BCJ or BCJ2) for PE files (EXE, DLL). If the file is too large, generalizing the features will often reduce the overall size and allow the shapefile to be added to the map. Compression. The archive utility supports 19 compression formats, including the new 7-Zip format, which offers extremely high compression ratios. If you choose for 'Store', the files won't be compressed. RFC 1979 PPP Deflate August 1996 Reliability and Sequencing PPP Deflate requires the packets to be delivered in sequence. Download wallpapers, icons, skins, themes for Windows 10/7/Vista/XP, sound schemes, WindowBlinds, Deskscapes, WinAmp, ObjectDock and More!. Decompress GZIP File. This option is only valid if the Method is. Image compression provides control over image fidelity in the output PDF document. Does the library support the BZIP2 compression method within ZIP files? Yes. dotnet add package System. Although this is widely used for documents, this method is not aware of the content's purpose. An entire directory structure can be packed into a ZIP archive with a single command. Work directly with hex or base64 encoded string representations of compressed data. This option is only valid if the Method is ZIP_CM_BZIP2. This guide demonstrates how to automate repetitive compression tasks using batch files with two popular free archiving tools, the command-line utility for IZArc (freeware) and the standalone console version of 7-Zip (7-Zip Extra: standalone console version). Compression method can be set to: store - Setting the compression method to store forces zip to store entries with no compression. ZIP entry comments have maximum length of 0xffff. 7-Zip is a great free file compression manager that offers an innovative compression format, the 7z format, with its unique compression capability this archives manipulation utility achieves higher compression ratios than other standard formats like ZIP or RAR. Audio that's encoded at 22. Easy to use but comprehensive settings satisfies your MP4 compression requirement. Most file formats can be reduced in size for more efficient use of disk space. This is the second lesson in a series of lessons that will teach you about data and image compression. NonUTF8 bool CreatorVersion uint16 ReaderVersion uint16 Flags uint16 // Method is the compression method. What is the best compression method for huge folders? The HDD is 1TB in size and I'm using roughly 700 gb. Zip utility is used to combine as well as compress files in Linux. AES-256 is proven much more secure than ZipCrypto, but if you select AES-256 the recipient of the zip file may have to install 7-zip or another zip program to read the file contents. Compress files with our free online file compression tool. Having introduced the ZIP file format nearly three decades ago, PKZIP continues to set the worldwide standard for data compression and file management. Creates a zip archive that contains the files and directories from the specified directory, uses the specified compression level, and optionally includes the base directory. It is a file archive compression utility that can be used on any computer. Compression Methods. Keep in mind that ZIP folders are different than other types of compression (e. LZW compression sometimes resulted in a larger file than the original. The documentation currently only describes the file layout format and meta information but does not address the actual compression or encryption of the file data itself. ZIP_DEFLATED¶ The numeric constant for the usual ZIP compression method. Steps to Create a Well Compressed Zip File: Step 1. Supports the BZip2 and BWT compression methods for improved compression when speed is less crucial. Download bluestacks zip for free. Because of this, it does extremely well when compressing English text. filesystem" The ZipFile. Solid Block Size: A normal Zip file is Non-Solid. If the file is too large, generalizing the features will often reduce the overall size and allow the shapefile to be added to the map. Supports the BZip2 and BWT compression methods for improved compression when speed is less crucial. The 7z format initially appeared as implemented by the 7-Zip archiver. 7-Zip and WinRAR are two compression utilities that are designed with high compression ratio. The only problem is - 7-zip is not found by default in all organizations as it is third-party tool. This document describes the on-disk structure of a PKZip (Zip) file. zip files ("deflate"). In such cases, we can use a lossy data compression method. One of the reasons for this test is to find the best compression, so where there was an option, I have chosen to use the most aggressive compression offered by each tool. Candidates. First is, what to zip and second is where to put it. Decompress GZIP File. The bzip2 compression tool is recommended because it provides the most compression and is found on most UNIX-like operating systems. gzip (GNU zip) is one of the most used Linux compression methods. This method is the same as using -0 (compression level zero). tif | grep Compression Compression (259) SHORT (3) 1. There are 10 levels of compression provided by zip command. Modifications to a ZIP file MAY cause different values to be stored for each file. Zstd, short for Zstandard, is a new lossless compression algorithm, aiming at providing both great compression ratio and speed for your standard compression needs. zip compressed folder/file, like the MS HELP says to do, but neither works. ZIP archive that has been compressed with an advanced compression method developed by CorelWinZip. No other compression methods are currently supported. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Folder to move the files in and out of a zip file. Syntax-m The format for this switch depends on the archive type. How to Use 7-Zip to Compress Files. Originally was designed to save storage space but these days it has become a easy way to share files. Select the file or folder you want to compress and move your cursor to the top of the Windows Explorer inside the Ribbon Menu area. // // When reading, an extended timestamp is preferred over. If it is false zipfile will raise an exception when the ZIP file would require ZIP64 extensions. I think you may have question in 1). unknown compression method. 15 Bytes/cycle). This information is provided to help you understand the differences between the two methods and to give you the information needed to choose one or the other. Zip does not support DEFLATE64 compression method. Specifies how much effort bzip2 should take before resorting to a slower fallback compression algorithm. WinRar has an inbuilt functionality which can help you find that. Problem: $ unzip -l muh. COMPRESSION MEDIUM DECOMPRESSION INPUT DATA COMPRESSED DATA CODE STREAM OF BITS OUTPUT DATA ORIGINAL DATA C O M U N I C A T I O N L I N E CODES An Improved Data Compression Method for General Data Salauddin Mahmud Abstract-Data compression is useful many fields, particularly useful in communications because it enables devices to transmit or. To do this, follow these steps in WinZip 10: Click File, and then click New Archive. in this video I'm going to go over how I maximize my File compression, I'll be changing the default settings of an open source program called 7z which you probably know. PKWARE defines the format for. But the trade isn't always a good one. So now let's choose WinRAR to learn how to increase file compression ratio. There are few different types of compression you can use in PDF Impress: ZIP: This method is good to use on images with large areas of single colors or repeating patterns. Values other than these will result in no compression taking place. unknown method. Enter the piston stroke length. Modifications to a ZIP file MAY cause different values to be stored for each file. Description. As of Version 6. Need to compress and post several large files (over 1 GB in size after being compressed) on an FTP site. COMPRESSION MEDIUM DECOMPRESSION INPUT DATA COMPRESSED DATA CODE STREAM OF BITS OUTPUT DATA ORIGINAL DATA C O M U N I C A T I O N L I N E CODES An Improved Data Compression Method for General Data Salauddin Mahmud Abstract-Data compression is useful many fields, particularly useful in communications because it enables devices to transmit or. Audio that's encoded at 22. ZIP and 7Zip are also very common archiving formats. Deferred - the data is compressed when the ZIP archive is about to be saved. Level 6 is the default level of compression. Decompression is the reverse of compression to get the source data (or file) back by applying some decoding algorithm. 7-Zip normal is a bit slower than any WinRAR setting but also compresses more. The various au-dio compression techniques offer different levels of complexity, compressed audio quality, and amount of data compression. When you try to extract a. For security, you can encrypt your archives using either the AES or PAE method. As an option it has two purposes: when a zipfile is specified with no other options, -v lists archive files verbosely, adding to the basic -l info the compression method, compressed size, compression. " DCL Implode is a proprietary compression. DEFLATE64 is a proprietary algorithm, which doesn't necessarily mean open source software can't implement it, but it does make open source software sad to implement it (the. Re: "Unsupported compression method" in 7-zip file Post by Scallica » Sat Apr 09, 2016 5:01 pm I am using WinRAR 5. 7-zip Compression Settings Guide This guide is created to help 7-zip users understand what settings do what and how to achieve best compression on their systems, for this guide I am using 7-zip gui however I believe reading this guide will help you with commend line version as well. Zip/unzip is one of the commands used in Linux to create compressed files and to extract. These feature waterproof seams and zippers, plus compression buckles. If you specify {N}, 7-Zip tries to use N threads. set compression Method e. The archive utility supports 19 compression formats, including the new 7-Zip format, which offers extremely high compression ratios. It provides a higher compression ratio which is more than a typical ZIP compression. With further investigation of the zip file, it was discovered that the zip file was using the DEFLATE64 compression method to be compressed. 2) Bad ZIP headers in archive. To add compression, the zlib module is required. BTW, what's the default compression method on Ubuntu?. We have used a program installation because it is easy to show differences in compression ratios, but if you use any application you will notice similar results. The shapefile must be less than 10 MB in size and have less than 4,000 point features or 2,000 line or polygon features. Editing funtions to personalize your MP4 video before compression. Zip compression always resulted in a smaller file than the original. ZIP is an archive file format that supports lossless data compression. If allowZip64 is True (the default) zipfile will create ZIP files that use the ZIP64 extensions when the zipfile is larger than 4 GiB. This is done for each block. zip file with the default options in 7-Zip. Step 4: Change the Archive format to "Zip". The ZIP file format permits a number of compression algorithms, though DEFLATE is the most common. Compression formats other than a. Both WinZip and the ZIP functions in Windows may use compression methods not supported by the Java API. The compression methods that are currently defined by the Zip 2. compression method and size), but that's because we're. This format was originally created in 1. WinZip ® provides several methods for compressing the files that you add to a Zip file. It provides very fast decompressing (about 10-20 times faster than compressing). Brotli is a new open source data compression method. While we have attempted to provide the necessary details of the current PPMd, WavPack, and compressed Jpeg method specification in Zip file format, developers and other interested third parties will need to have or obtain an understanding of basic compression concepts, Zip file format, etc. How to Use 7-Zip to Compress Files. Solid Block Size: A normal Zip file is Non-Solid. Well, making a zip archive on a Mac is easy, and with the compression tools built directly into Mac OS X there is no need to download additional software or add-ons to quickly create zips and compress either a single file, a group of files, or an entire folder. Do you need to compress files? 7-Zip is ready to help! Here, we'll uncover how to use 7-Zip to compress and uncompress files. WorkFactor => number. NET’s compression library uses the Deflate algorithm, there are no IP issues. Download bluestacks zip for free. I just took standard parameters, you might optimize each method on its own to save more space or time. 5GB, don't remember) but putting "4370 MB" makes the compressed file be 2. Originally was designed to save storage space but these days it has become a easy way to share files. This method accepts two arguments: a source directory and a destination file. In case, the above method fails to resolve the problem, then you need to Repair Zip File by using a powerful Zip Repair software. Hi Marcus, 7-zip is fairly simple to use. The method of interaction is the same as a folder. ZIP compression. It does not suffer from the uniform blocks, so characteristics of JPEG images with very high compression rates. Creates a zip archive that contains the files and directories from the specified directory, uses the specified compression level, and optionally includes the base directory. The tool especially plays an important role in web development, which is based on the deflate algorithm and was originally developed as a successor to the Unix original rock compress for the GNU platform. 4 successfully. // // When reading, an extended timestamp is preferred over. JBIG2 is a compression method that is much more superior than CCITT when dealing with monochromatic images. 7-Zip reads small data block at the beginning of file and tries to parse the header. Below you can find a step-by-step guide for using Handbrake to compress your video. ZLIB Compression Library (PKZIP/GZIP Compression) This is an excellent free C library that allows you to compress and decompress any buffer or file using the inflate/deflate method used by PKZIP, InfoZIP and others. If the file is too large, generalizing the features will often reduce the overall size and allow the shapefile to be added to the map. The only method not supported is method 10, which is known as "DCL Implode. Do you need to compress files? 7-Zip is ready to help! Here, we’ll uncover how to use 7-Zip to compress and uncompress files. Specifies how much effort bzip2 should take before resorting to a slower fallback compression algorithm. Choosing a Compression Method WinZip 11. Compression --version 4.