Introduction to video (part 1)

 What are some advantages of digital video: 

• It is faster than normal video 
• Is easier to edit footage taken on the digital video
• Videos can be upload to the computer to edit and watch
• Can upload videos stargith onto sites- easy to share with others 

 What is meant by frame rate in video: 
The frame rate in video refers to how quickly an image or frame can be projected or displayed every second.

Are all videos/ movies the same fame rate, explain your answer: 
No. There are currently three main frame rate standards; 20p, 25p and 30p

• 20p- displays 20 progressive frames per second (Most commonly used frame rate, in videos and films)
• 25p- displays 25 progressive frames per second (Mainly used for the television and frame rate) 
• 30p- displays 30 progressive frames per second (Least used frame rate) 

What is meant by resolution, how is it measured: 
 Resolution is measured in picture elements or "pixels" for short. Resolution is a mixture of lines and pixels. A television or recorded video image is made up of scan lines, rapidly scanning horizontal lines starting from the top, moving down to the bottom. There are two ways to measure this:

1. Split the lines into two 'fields' where all the odd numbered lines are displayed first then all the even numbered lines are shown producing a complete frame. This is called interlacing or interlacing scan
2. All the lines (odd & even) are displayed sequentially. This is called progressive scan and is commonly used in computer monitors.