Book Image

Learning VirtualDub: The Complete Guide to Capturing, Processing and Encoding Digital Video

Book Image

Learning VirtualDub: The Complete Guide to Capturing, Processing and Encoding Digital Video

Overview of this book

VirtualDub is one of the most popular video processing applications for Windows. As an open source application, it's free, and is constantly updated and expanded by an active community of developers and experts. VirtualDub is particularly popular for capturing video from analogue sources such as video tape, cleaning up the image and compressing it ready for distribution over the Internet. This book provides a rapid and easy to use tutorial to the basic features of VirtualDub to get you up and running quickly. It explains how to capture great quality video from various sources, use filters to clean up the captured image and add special effects. The book also shows how to use VirtualDub to cut and paste video to remove or insert sequences, including removing ad breaks or trailers. It goes on to cover the art of effective encoding and compression, so you end up with great quality videos that won't hog your bandwidth forever. VirtualDub is the fastest and most effective way to capture, process and encode video on your PC. This book gets you started fast, and goes on to give you full control of all the features of this legendary tool.
Table of Contents (14 chapters)
Learning VirtualDub
Credits
About the Authors
Introduction

Logo Removal Filters


While capturing video from analog resources, especially TV channels, there are often logos or other information such as date, time, and name on the images. Sometimes we prefer to erase all this from our video. Many plug-ins have been developed to achieve this goal. Let us try some of them.

Logo Removal with DeLogo

The DeLogo plug-in (delogo132.zip) developed by Karel Suhajda can be downloaded from http://neuron2.net/delogo132/. This filter features two logo removal techniques. Logos have either semi-transparent or solid colors. For removing semi-transparent parts of an image, we have to use the DeBlend feature of the DeLogo plug-in.

This feature works with a given alpha and color mask. DeLogo has an analyzer that uses this data to compute the color of pixels behind the logo and redraw them at that position. When dealing with solid logos on an image, the DeBlend technique fails.

In this situation, we have to use the Repair property. The solution used in this technique...