Difference between revisions of "MTD2 class 10"

Revision as of 03:01, 4 April 2007

Frame Rate

Persistence of Vision

Video sync

SMPTE Society of Motion Picture and Television Engineers -@ wikipedia

00:00:00:00 Hours:Minutes:Seconds:Frames 24:59:59:29

30 Frame ND (Non-Drop) - Black and white NTSC

30 Frame drop frame - Color NTSC (Never the same color twice)(US/JAPAN) actually uses a frame rate of 29.97 but drops every 00 and 01 frame on every even minute unless its a 10's minute. Since the clock is slower it really take 1 hour and 3.6 seconds to count one hour so they decided to drop some frames. It does this so that the sower clock rate will match real time.

ntsc spec from 1939 before color. why 29.97fps
2/3 pull down to transfer film to video

25 Frame - PAL/SECAM

24 - film

Frame Aspect Ratio

16x9 Full Frame is shown

4x3 squeeze The 16x9 image is squeezed into the 4x3 aspect ratio. Everything gets taller and thinner

4x3 scan Pan and Scan cut out some of the 16x9 frame to make it fint into 4x3

Fame Resolution/Size

720x480 DV 4x3 aspect ratio (DV can also do wide screen by reducing the vertical resolution to 720x360) 1015 KB per frame uncompressed

640x480 TV 4x3 aspect ratio 900 KB per frame uncompressed

604x456 tv cropping

320x240 Multimedia 4x3 aspect ratio 225 KB per frame uncompressed

160x120 Multimedia 4x3 aspect ratio 59 KB per frame uncompressed

1280x720 HDTV 16x9 aspect ratio 2.6 MB per frame uncompressed

1920x1080 HDTV 16x9 aspect ratio 5.9 MB per frame uncompressed What is Video Formatting? Digital TV: A Cringely Crash Course

480 Interlaced: 14,400 scan lines/second X 480 horizontal pixels/scan line = 6,912,000 pixels/second.

480 Progressive: 34,560 lines/second X 640 pixels/line = 22,118,400 pixels/second

720 Progressive: 43,200 lines/second X 1280 pixels/line = 55,296,000 pixels/second

1080 Interlaced: 32,400 lines/second X 1920 pixels/line = 62,208,000 pixels/second

1080 Progressive: 64,800 lines/second X 1920 pixels/line = 124,416,000 pixels/second

Codecs and Compressors

http://www.siggraph.org/education/materials/HyperGraph/video/codecs/Default.htm http://www.fourcc.org/ http://www.extremetech.com/article2/0,1697,1544886,00.asp http://people.csail.mit.edu/tbuehler/video/codecs/index.html

Video for CD

15 Frames a second mostly 22K 16 or 8 bit audio

Video for Web

8 Frames a second mostly 22k or lower and 8 bit

Animation in Flash

1. Onion Skinning: animation technique where each frame is drawn bases on the previos frame
   1. Rotoscoping
2. Motion Tweening (Key Framing)
   1. Path Animation Tweening/Path Animation Tutorial
   2. http://www.echoecho.com/flashtweenings01.htm

Flash Demo

1. Show Motion Tween
   1. Show transform tools
   2. Show registration point
2. Show Onion Skin
3. Show Symbols
   1. Difference between Graphic And Movie Clip
   2. DO NOT USE MOVIE CLIPS
   3. USE GRAPHICS

Homework

• One key frame animation in flash and one onion skin animation saved as swf and link on web site.
• Try to animate one of your scenes in flash and save it as an swf

Links

• About.com video glossary

Homework

Video Test 3

• Import traced storyboards into flash (make sure stage size is 720x480)
• Export new frames to .bmp or .png Export frames from Flash
• Import new frames to Premiere Import new Flash Boards to Premiere
• Render and new video test with the new boards
• Post Version 3 video and new boards on you website

Post an example of a tweened animation and an onion skinned animation. Make sure to link it from you website