The .Net encoder built-in to the library (at least the default Windows library provided by Microsoft) is pretty bad: http://b9dev.blogspot.com/2013/06/nets-built-in-jpeg-encoder-convenient.html Partial Update I’m now using an approach outlined here, that uses ImageMagick for the resize then jpegoptim for the final compression, with far better results. I realize that’s a partial answer but I’ll expand on … Read more
ZipFile.GetEntry should do the trick: using (var fs = new FileStream(sourcePath, FileMode.Open, FileAccess.Read)) using (var zf = new ZipFile(fs)) { var ze = zf.GetEntry(fileName); if (ze == null) { throw new ArgumentException(fileName, “not found in Zip”); } using (var s = zf.GetInputStream(ze)) { // do something with ZipInputStream } }
Pako is a full and modern Zlib port. Here is a very simple example and you can work from there. Get pako.js and you can decompress byteArray like so: <html> <head> <title>Gunzipping binary gzipped string</title> <script type=”text/javascript” src=”https://stackoverflow.com/questions/14620769/pako.js”></script> <script type=”text/javascript”> // Get datastream as Array, for example: var charData = [31,139,8,0,0,0,0,0,0,3,5,193,219,13,0,16,16,4,192,86,214,151,102,52,33,110,35,66,108,226,60,218,55,147,164,238,24,173,19,143,241,18,85,27,58,203,57,46,29,25,198,34,163,193,247,106,179,134,15,50,167,173,148,48,0,0,0]; // Turn number array … Read more
I would try to unzip and untar separately and see what happens: mv Doctrine-1.2.0.tgz Doctrine-1.2.0.tar.gz gunzip Doctrine-1.2.0.tar.gz tar xf Doctrine-1.2.0.tar
Using gzip.GzipFile: import gzip with gzip.open(‘input.gz’,’rt’) as f: for line in f: print(‘got line’, line) Note: gzip.open(filename, mode) is an alias for gzip.GzipFile(filename, mode). I prefer the former, as it looks similar to with open(…) as f: used for opening uncompressed files.
All the compress packages implement the same interface. You would use something like this to compress: var b bytes.Buffer w := gzip.NewWriter(&b) w.Write([]byte(“hello, world\n”)) w.Close() And this to unpack: r, err := gzip.NewReader(&b) io.Copy(os.Stdout, r) r.Close()
The magic number for gzip compressed files is 1f 8b. Although testing for this is not 100% reliable, it is highly unlikely that “ordinary text files” start with those two bytes—in UTF-8 it’s not even legal. Usually gzip compressed files sport the suffix .gz though. Even gzip(1) itself won’t unpack files without it unless you … Read more
I recommend using Apache Ant and YUI Compressor. http://ant.apache.org/ http://yui.github.com/yuicompressor/ Put something like this in the Ant build xml. It will create two files, application.js and application-min.js. <target name=”concatenate” description=”Concatenate all js files”> <concat destfile=”build/application.js”> <fileset dir=”src/js” includes=”*.js” /> </concat> </target> <target name=”compress” depends=”concatenate” description=”Compress application.js to application-min.js”> <apply executable=”java” parallel=”false”> <filelist dir=”build” files=”application.js” /> … Read more
Master copy Lossless – HUFFYUV in AVI is a good option. Lossy – MJPEG (series of JPEG) in AVI is a good option, where each frame will be independently encoded. The editing will be faster. Distribution Video codec – Use either H.264 video (not free) or VP8 (free video codec by Google). You should use … Read more
No, you can’t. The zipping algorithm works on streams and adapts its internal codings to what the stream contains to achieve its high compression ratio. Without knowing what the contents of the stream are before a certain point, it’s impossible to know how to go about de-compressing from that point on. Any algorithm which allows … Read more