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Learning VirtualDub: The Complete Guide to Capturing, Processing and Encoding Digital Video by Georgios Diamantopoulos, Sohail Salehi

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Hazardous Habits—How to Preserve Quality

In this section we will see how to avoid doing things that will result in a quality loss—errors common to users new to video processing. We will go a little deeper into:

  • Converting from one format to another—transcoding
  • Lossless and lossy codecs
  • Color spaces

Knowing about the above concepts will give you a better understanding of what is going on behind the scenes and allow you to tweak the process.

Re-Compressing Video

Let’s think about what happens when re-compressing video. Assume we have a video ‘V’. The owner of ‘V’ used a lossy codec to compress it at a very good quality giving another video ‘C’. You are not satisfied with ‘C’ because it is too grainy for your liking so you open it in VirtualDub, attach ...

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