MTD2 class 10
Contents
Frame Rate
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 colro twice)(US/JAPAN) actually uses a frame rate of 29.97 but drops every 00 and 01 frame unless its a 10's frame. 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 doe sthis 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 Homework One keyframe animation in flash and one onion skin animation saved as swf and link on web site.
Links
Homework
Video Test 3
- Import storyborads into flash (make sure stage size is 720x480)
- Trace all boards in flash
- 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 borads
- Post Version 3 video and new boards on you website
