pdf.js is an HTML5 technology experiment from Mozilla that explores building a faithful and efficient Portable Document Format (PDF) renderer using Canvas without any native code support. The goal of the project is to create a general-purpose, web standards-based platform for parsing and rendering PDFs, and eventually to release a PDF reader extension powered by pdf.js. Integration with Firefox is a possibility if the experiment proves successful.
In the last post we constructed a graph structure using the Structure_Graph Pear library. But building a graph is not enough; we also need the ability to search through it. To make it easier to build search algorithms, it is useful if we can represent the graph and its connections in a different way; adjacency matrix being one such representation.
Graphs are one of the most frequently used data structures,along with linked lists and trees. In a recent PHP project I needed to build a Graph structure to analyze some interlinked urls. The problem was of a simple nature, so rather than writing my own code, I went with the one available in the Pear repository.
The Pear Structures_Graph package allows creating and manipulating graph data structures. It allows building of either directed or undirected graphs, with data and metadata stored in nodes. The library provides functions for graph traversing as well as for characteristic extraction from the graph topology.
Continuing the last post on FFmpeg, here we will discusses various fundamental tasks you can accomplish with the audio stream in FFmpeg.
One of the basic tasks you can perform on an audio track in FFmpeg is to convert it into another format. This process known as Transcoding, is the direct digital-to-digital conversion of one stream encoding to another, whether video or audio. Transcoding is usually done in cases where a target device – media player such as iPod, iPAD, DVD players or a software application, does not support the format or has limited storage capacity that requires a condensed file size. Transcoding can also be used to convert an incompatible or obsolete format to a better-supported format.
The idea for this posts arose from my frustration on not finding any organized documentation for learning FFmpeg. Thus, my aim in writing this series has been to provide newbie learners to quickly get up-and-running with FFmpeg.
One of the features lacking in the current browser api is that of determining whether the web page is currently visible to the user or is hidden (either in another tab or window).
Check the below demo page to see how this works. The demo was tested in Safari, Opera 11.10, Chrome and Firefox.
This site is a digital habitat of Sameer, a freelance web developer working in PHP & MySQL.More