Our support department recently responded to a request for a code sample to convert PDF to JPEG. The customer needed to leverage LEADTOOLS to split and convert thousands of PDF files into single page JPEGs.

JPEG images are universal and can be loaded by practically any client on any operating system. If the PDF files are photos, JPEG is the perfect universal image format for conversion. JPEG is designed specifically for photo images, supporting 24 bits per pixel color and 8 bits per pixel grayscale data.

If the PDF files are text based and need to be converted to a universal image format, PNG and GIF are more appropriate. PNG and GIF support fewer bits per pixel, including 1- and 4-bits and leverage lossless compressions. These factors result in less data to be compressed and clearer images of text and clip art. Typically, PNG results in smaller file sizes when compared to GIF.

Base64 encoding is used to encode binary data, such as a PDF file, into an ASCII string format that is compatible with systems that can only handle text. For example, email attachments and binary uploads in HTML forms are converted and transmitted as Base64 encoded data.

The C# code snippet below shows how easy it is to save as any LEADTOOLS image format, including PDF, with Base64 encoding.

Lately we've had some customers inquire about using LEADTOOLS Multimedia 18 with the Cloud SDK. This is a perfect choice since the conversion of audio/video files is what originally sparked the creation of our Cloud SDK. LEADTOOLS Multimedia V18 gives distributed processing application developers the most flexibility, features and performance with the latest codecs, processing filters, and the option to use either DirectShow or Media Foundation. This combination sets up LEADTOOLS as the unrivaled choice for parallel processing of multimedia conversion tasks.

In case you're new to the LEADTOOLS Cloud SDK, its greatest asset is the freedom it gives developers. While we include demos for OCR and Multimedia since those are the most popular kinds of distributed applications among our customers, the Cloud SDK is actually a completely independent framework. You don't have to use LEADTOOLS Multimedia, OCR, Image Processing, or really any LEADTOOLS imaging feature. LEADTOOLS Cloud SDK simply makes it easy to divide any job amongst an unlimited number of networked computers and get your job done faster and less expensively.

This post is part of our 2017 Developer App Series, which showcases apps created by our Support Agents over the course of eight weeks. These apps are intended to be larger, more thoughtful apps with highly practical purposes in mind, as opposed to a basic "how to" for a feature.

App Description

This project from Amin will utilize two of the LEADTOOLS Callback filters to combine multiple videos into a single video output. It uses the RGB filters, the Video Resize Filter, and the Still Image Reader filter. The UI provides allows the user to add more than two videos as well as setting the order for combining them.

Even today there are many organizations that rely on fax as a required form of communications. Because of this, receiving faxes is a requirement that much still be met. To do this, many organizations utilize fax services either hosted locally or by a third-party. Many of these services will email received faxes to users as a PDF file.

In a normal facsimile transmission, every other scan-line is skipped. This reduces the amount of data that needs to be sent over the relatively slow connection used to send faxes. To account for the missing scan-lines, the aspect ratio of the pixels is 2:1. It is important to recognize this when displaying the image else you will end up displaying the image incorrectly, making it looked squashed.