compression

We're building an online video editing service. One of the features allows users to export a short segment from their video as an animated gif. Imgur has a file size limit of 2Mb per uploaded animated gif. Gif file size depends on number of frames, color depth and the image contents itself: a solid flat color result in a very lightweight gif, while some random colors tv-noise animation would be quite heavy. First I export each video frame as a PNG of the final GIF frame size (fixed, 384x216). Then, to maximize gif quality I undertake several gif render attempts with slightly different

This question already has an answer here: Minimizing jar dependency sizes 3 answers Is there a good app to reduce jar file size by eliminating redundant classes/methods/constant pool elements? (i.e. not reachable from a fixed set of entry points, assuming no reflection) I'm tired of pulling in bloated libraries when I'm just using a couple of methods from them. (I'm not talking about small "local" optimizations like making names smaller. I'm thinking more of something that does global analysis to figure out which classes/methods/variables are used, given a set of entry points (including

I read some articles about HTTP headers compression. Today I installed YSlow and it recommends that I compress the resources (text/html, javascript, css and images). Now I'm reading the documentation for Apache mod_deflate but in the example don't compress images. Should I or should I not compress images in my site? Your images should already be compressed - any extra compression won't have any noticeable effect on filesize, but will increase processing time. .png files use DEFLATE compression already. .jpg files generally use lossy compression . .gif files use LZW compression . Compressing

The below code will compress one file. How can I compress multiple files var gzip = zlib.createGzip(); var fs = require('fs'); var inp = fs.createReadStream('input.txt'); var out = fs.createWriteStream('input.txt.gz'); inp.pipe(gzip).pipe(out); Something that you could use: var listOfFiles = ['firstFile.txt', 'secondFile.txt', 'thirdFile.txt']; function compressFile(filename, callback) { var compress = zlib.createGzip(), input = fs.createReadStream(filename), output = fs.createWriteStream(filename + '.gz'); input.pipe(compress).pipe(output); if (callback) { output.on('end', callback); } } #1

Im doing a query that returns like 70k documents (I need all of them, and Im currently using scan & scroll) What happens is that the response is very large (2 MB and we alredy reduced it from 6 MB). We alredy filtered the fields we needed, and since the query is only called from an API we reduced the name of the properties. What i can see is that every document in the array "hits" has the following default fields that i really dont need them: _index (we only request on one index) _type (we only request on one type) _id (we alredy have this on a field) _score (we are not scoring) Is there a way

I'm currently working on a proxy server where we in this case have to modify the data (by using regexp) that we push through it. In most cases it works fine except for websites that use gzip as content-encoding (I think), I've come across a module called compress and tried to push the chunks that I receive through a decompress / gunzip stream but it isn't really turning out as I expected. (see below for code) figured i'd post some code to support my prob, this is the proxy that gets loaded with mvc (express): module.exports = { index: function(request, response){ var iframe_url = "www.nu.nl";