Compression is a critical component of modern film and TV production. It's used right inside the camera you use to film, and in the files you will deliver. There are excellent reasons to use compression, with just one or two challenges to consider when choosing settings. This video explains compression in simple terms, so you can understand the role it plays in modern media production.
- [Instructor] When a picture or sound information…is in its raw state, it's big.…It's really, really very big.…Just regular HD video is 1,920 pixels by 1,080,…and that's 2,073,600 pixels.…In digital stills camera terms, it's about 2 Megapixels.…But remember, there are three color channels for each pixel.…Whether the color information is RGB or YUV,…it's still three 8-bit numbers,…even for the most basic, standard 8-bit video.…
So we're actually talking about…6,220,800 monochrome pixels,…and each one of those monochrome pixels is 8-bits.…So now, we're at 49,766,400 bits.…That's individual ones and zeros,…and this is for a single frame.…Multiply that by 24 frames per second,…which is just about the minimum anyone uses,…and we have an enormous 1,194,393,600 bits…for every second of video.…
In case your curious,…that's 4,777,574,400 binary bits for UHD.…It's a lot of ones and zeros…to store, transmit, playback and display.…Codecs compress this amount of information…into something more manageable.…It's a little like using shorthand to write something…
Get ready to remove the mystery behind terms you've encountered. If you work in a creative profession, this can enhance your command of the tools you use. Learn what a pixel really is, what color channels are, and what audio frequency is. Discover how color channels, bit depth, and video frame rates work. Find out the difference between codecs and file formats, and how compression is involved. By the end of this course, you'll know how to answer common client questions—like, whether a logo should be supplied in vector or bitmap form, and more.
Note: Motion graphics in this course were provided by Chelsea Parrish: chelseaparrish.com.
- What is a pixel?
- Aspect ratios
- Bit depth
- Alpha and transparency
- Light and color channels
- Color modes: RGB, YUV, CMYK
- Camera depth of field
- Chroma Key and Luma Key
- Blend modes
- Color wheels, vectorscopes, and waveforms
- Video compression and codecs
- Frame rates and timecode
- File formats
- Audio amplitude
- Capturing audio tone as frequency
- Audio timing using the phase
Skill Level Beginner
Learning Video Production and Editingwith Rob Garrott19m 25s Beginner
Video Foundations: Cameras and Shootingwith Anthony Q. Artis2h 58m Appropriate for all
Introduction to Video Dialogue Editingwith Ashley Kennedy3h 14m Appropriate for all
1. How Do Computers Think?
2. How Cameras and Computers Think about Color
3. The Language of Color
4. The Shape of Your Picture and the Speed of Your Video
5. Storing Everything (Codecs)
6. Color Wheels, Vectorscopes, and Waveforms
Understanding waveforms2m 39s
7. Making Changes
8. Audio Made Simple
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