Package Exports

jpegtran

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (jpegtran) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

node-jpegtran

The jpegtran command line utility as a readable/writable stream.

If you don't have a jpegtran binary in your PATH, node-jpegtran will try to use one of the binaries provided by the node-jpegtran-bin package.

The constructor optionally takes an array of command line options for the jpegtran binary:

var JpegTran = require('jpegtran'),
  myJpegTranslator = new JpegTran(['-rotate', 90, '-progressive']);

sourceStream.pipe(myJpegTranslator).pipe(destinationStream);

JpegTran as a web service (sends back a horizontally flipped grayscale version of the request body):

var JpegTran = require('jpegtran'),
  http = require('http');

http
  .createServer(function (req, res) {
    if (req.headers['content-type'] === 'image/jpeg') {
      res.writeHead(200, { 'Content-Type': 'image/jpeg' });
      req.pipe(new JpegTran(['-grayscale', '-flip', 'horizontal'])).pipe(res);
    } else {
      res.writeHead(400);
      res.end('Feed me a JPEG!');
    }
  })
  .listen(1337);

Installation

Make sure you have node.js and npm installed, then run:

npm install jpegtran

Releases

Changelog

License

3-clause BSD license -- see the LICENSE file for details.