compression

问题 How can I use Python to convert a qcow2 image file into a raw image file? I know of qemu-img , but I'm curious about any Python libraries that might allow me to avoid asking my users to install that tool. It's not packaged with a default Fedora install, and that's what I'm developing for. If there are no other options however, I'll use qemu-img . 回答1: It seems that qemu-img is a necessity for converting qcow2 image files to raw images. I did not find a solution that avoided calling on this

问题 I recently changed my Paperclip configurations: New Configs: has_attached_file :scr, :styles => { :index => "215x165#", :show => "900" }, processors: [:thumbnail, :compression], :content_type => { :content_type => ["image/jpg", "image/png"] } Old Configs: has_attached_file :scr, :styles => { :index => "215x165# For Showing the Pictures i need on my App i use the :show attribute. The Problem is that my app has already a lot of pictures and upon changing the configs the pictures are not longer

问题 Is possible to compress/archive a directory with all of its sub-directories and files in a single file from cmd.exe ? I know there are a lot of utilities available but I need to perform the operation only with the windows default utilities . I'm running windows server 2003 . 回答1: Although the old makecab doesn't store a real directory structure, you can command the output directories for each file if you really need it. The procedure is more cumbersome than using a modern utility, but can be

问题 assuming the mathematical expression has less number of characters than the original number. example- 20880467999847912034355032910578 can be expressed as (23^23 +10) this looks like a good compression method. Will it work for compressing large files? UPDATE- i didn't mean converting a file into a large binary number. lets say i have a text file and i replace all the characters in it with their ascii values. now i have a large number in the decimal number system. i can express it as a

问题 assuming the mathematical expression has less number of characters than the original number. example- 20880467999847912034355032910578 can be expressed as (23^23 +10) this looks like a good compression method. Will it work for compressing large files? UPDATE- i didn't mean converting a file into a large binary number. lets say i have a text file and i replace all the characters in it with their ascii values. now i have a large number in the decimal number system. i can express it as a

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . I have some data that has been compressed with the DEFLATE algorithm which I believe is basically just saying its zipped up. I'm writing a swift app and I was interested in figuring out if there is a native pure swift (2.0) implementation of the unzip algorithm. I need to implement this in a swift dynamic

问题 well I am having a problem renaming the ICSharpCode.SharpZipLib.dll file to anythig else. I am trying to shorten the file name. I reference the assembly in the project, but when the program reaches the statements where I use the library. It spawns an error that it could not find the assembly or file 'ICSharpCode.SharpZipLib'. When I change the file name back to ICSharpCode.SharpZipLib.dll the application works noramally. So, is there any way to change the file name. Also, am I allowed to

问题 I am trying to decompress a byte array. byte[] bloc = { 120, 156, 211, 97, 144, 76, 247, 142, 98, 228, 98, 0, 2, 70, 101, 6, 166, 8, 16, 131, 133, 131, 145, 129, 209, 134, 129, 133, 1, 44, 12, 4, 202, 118, 12, 0, 70, 22, 2, 148 }; As you can see the header is 120 165 (78 9c in hex) witch is the zlib default Compression algorithme. I used the ComponentAce.Compression.ZipForge from the zlib site. I couldn't find samples on how to unzip streams(not files). 回答1: Use SharpZipLib. It includes a

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I'm getting both Depth & Color frames from the Kinect 2, using the Kinect SDK ( C# ), and I'm sending them to Python clients using ZeroMQ . this.shorts = new ushort[ 217088]; // 512 * 424 this.depthBytes = new Byte[ 434176]; // 512 * 424 * 2 this.colorBytes = new Byte[4147200]; // 1920 * 1080 * 4 public void

问题 I was searching for the correct solution to decompress the string in java coming from c# code.I tried myself with lot of techniques in java like(gzip,inflatter etc.).but didn't get the solution.i got some error while trying to decompress the string in java from compressed string from c# code. My C# code to compress the string is, public static string CompressString(string text) { byte[] byteArray = Encoding.GetEncoding(1252).GetBytes(text);// Encoding.ASCII.GetBytes(text); using (var ms = new