1 / 16

1 Different Video Properties

1 Different Video Properties. Video Standards Different countries use different video standards for broadcasting. TV display standards in different countries. Frame 1 Frame 2 Frame 3 Frame 4 Frame 5 Frame 6 Frame 7 Frame 8.

ronny
Download Presentation

1 Different Video Properties

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1 Different Video Properties • Video Standards • Different countries use different video standards for broadcasting TV display standards in different countries

  2. Frame 1 Frame 2 Frame 3 Frame 4 Frame 5 Frame 6 Frame 7 Frame 8 Frame 9 Frame 10 Frame 11 Frame 12 Frame 13 Frame 14 Frame 15 Frame 16 1 Different Video Properties • Frames • Digitized video consists of a number of frames • Slightly different frames are displayed successively at high speed → continuous motion A video actually consists of individual frames

  3. 1 Different Video Properties • Frame Size • The width and height of individual frames • Larger frame size → higher video quality → larger file size Common video frame sizes

  4. 1 Different Video Properties • Frame Rate • The number of video frames displayed on the screen in one second • Measured in frames per second (fps) • Higher frame rate (above 24 fps) → smoother motion Some common video frame rates and corresponding multimedia systems

  5. Compression Decompression 1 Different Video Properties • Codec (Compressor and Decompressor) • The software used to compress and decompress video files • Compression reduces the storage space and the video access time Original video Compressedvideo Storage Decompressed video (playback) This step requires the appropriate codec installed on user’s computer

  6. 1 Different Video Properties • Codec • Different codecs use different methods to compress video • Some common codecs • MPEG-1, MPEG-2, MPEG-4 • Windows Media Video (WMV) • DivX

  7. Storage medium Video capturing device 2 Capture Digital Video • Concept • To capture digital video, it is necessary to have • A capturing device (a camcorder) • A storage medium • Video encoding hardware and software Video encoding hardware and software

  8. 2 Capture Digital Video • Examples • Video capturing devices • DV camcorder • Digital camera • Webcam • Video encoding hardware / Software • Video capture card • May use USB connection to the computer and encoded by a software

  9. A video capture card (top left) and an external video capturing device (bottom left). VideoStudio, the video capturing and editing software (right). 2 Capture Digital Video • Examples

  10. AVI (MPEG-4 codec) File size: 3.28 MB AVI (Cinepak Codec by Radius) File size: 13.1 MB AVI (uncompressed) File size: 111 MB The same 15-second AVI video in 3 formats 3 Common Video File Formats • Audio Video Interleave (AVI) • Windows video format developed by Microsoft • Large file size in uncompressed format

  11. 3 Common Video File Formats • Motion Picture Experts Group (MPEG, MPG) • A compression file format • Preserves video quality yet supports high compression ratio

  12. 3 Common Video File Formats • Motion Picture Experts Group (MPEG, MPG) • A family of compression standards • MPEG-4 can be as good as MPEG-2, but an MPEG-4 video is of a smaller file size

  13. Windows Media Player 3 Common Video File Formats • Windows Media Video (WMV, ASF) • A streaming compressed video format developed by Microsoft • Can be played by Windows Media Player

  14. 3 Common Video File Formats • RealVideo (RV, RM) • A compressed streaming audio format developed by RealNetworks • Can be played by RealPlayer

  15. QuickTime Player 3 Common Video File Formats • QuickTime (MOV) • A streaming compressed multimedia file format on Macintosh computers • Can be played with QuickTime Player

  16. 4 Simple Video Editing • Editing Movies • Common video editing skills include Adding titles and background music Applying transition effects between video clips Applying video filters

More Related