Graphics and Video File Types, Uses and Attributes Please take notes!

Picture/Drawing File Types There are two main ways computers handle and create images. There are two main ways computers handle and create images. The first are the bit-mapped file types. The first are the bit-mapped file types.  Programs using this type include:  Photoshop  Windows Paint  Painter Classic  Photo Editor

File Formats - Bit Mapped.jpg.jpg.tif.tif.bmp.bmp.png.png.raw.raw.gif.gif And many others And many others

Bit-Mapped Bit mapped images tend to be large files. Bit mapped images tend to be large files. Many types are not good for use on the Internet because of their size. Many types are not good for use on the Internet because of their size. Compression can be used to reduce the file size of the image. Compression can be used to reduce the file size of the image.  Examples:.tiff, jpg, gif Some compression schemes lose noticeable amounts of quality. Some compression schemes lose noticeable amounts of quality.

Vector-Based Graphics Vector-based graphics are based upon mathematical formulas. Vector-based graphics are based upon mathematical formulas.  These scale very well.  Some printers such as post-script printers use vector-based images to create fonts.  CAD programs are vector-based.  Vector-Based images do well with line drawings, but do poorly with photo- realistic images

Vector-Based Programs All CAD Programs All CAD Programs Freehand Freehand Adobe Illustrator Adobe Illustrator Corel Draw Corel Draw Appleworks Draw Appleworks Draw Google SketchUp Google SketchUp

Vector-Based File Types.eps.eps.swf.swf.ai.ai.cdr.cdr.dwg.dwg

Some Graphic File Types.bmp.bmp  Huge file size. Image broken down into pixels. Used for wallpaper, etc. in Windows.tif.tif  High quality – large file size, even when compressed. Used for printing.

Graphics files.jpg.jpg  Used for the Internet. Heavily compressed. Looks okay on-screen. Not so good for printing..gif.gif  Used for the Internet. Very heavily compressed. Limited color depth. Can support transparent color and limited animation.

Graphics files When you compress a file and overwrite it you lose detail that cannot be restored. When you compress a file and overwrite it you lose detail that cannot be restored. A 5kb.jpg balloons to 250kb when saved as a bit map with no increase in image quality. A 5kb.jpg balloons to 250kb when saved as a bit map with no increase in image quality.

Graphics Files Always keep in mind your end use when selecting a file type. Always keep in mind your end use when selecting a file type. Use graphics programs to translate from one file-type to another by doing a “Save As”. Use graphics programs to translate from one file-type to another by doing a “Save As”.

Video files Video files by their nature are rather large. Video files by their nature are rather large. .avi offers best quality  At full resolution count on 1.5 gig/minute  Files can be compressed into one of several file types. Each has its own advantages/disadvantages

Video Files Major file types Major file types .avi .mpg (mp1, mp2, mp3, mp4) .wma .divix  HCL (HD file type from Sony)  HDV  Quicktime

Video Files Streaming vs. Downloadable Streaming vs. Downloadable  Streaming can be viewed but cannot be saved without special software.  Downloadable files take a great deal of time to copy. .wma file types support both.

Streaming Video files Realplayer files are strictly streaming. Realplayer files are strictly streaming. Windows Media Player files can be either. It comes in both flavors. Windows Media Player files can be either. It comes in both flavors. Flash and Shockwave are strictly streaming. Flash and Shockwave are strictly streaming.

Non-Streaming Video Files These copy to your hard drive before playing: These copy to your hard drive before playing: .avi – Used for full-resolution applications such as editing. Can be used in PowerPoint. .mpg – Used for compressed video. Has many variations. Can be edited but it is not recommended. .wma – Windows Media Player. Can be used in PowerPoint. Offers different compression levels.

Video Files DIVIX DIVIX  Often used for movies  Files highly compressed  Students like these files  Player software used to be free and widely available. Now most charge.  Runs on Laptops and portable devices

Video Files.VOB – Used for DVD’s - Video object file..VOB – Used for DVD’s - Video object file. Special players can be used to play this file type such as WinDVD. Special players can be used to play this file type such as WinDVD. These files can also be edited. These files can also be edited.

High Definition Video There are video formats that were created specifically for HD. There are video formats that were created specifically for HD.  HCL  HDV Others have been adapted for HD Others have been adapted for HD  AVI  MP4/Quicktime

High Definition Video Special software may be needed to reduce HD footage to SD. Special software may be needed to reduce HD footage to SD. Some editing software may reduce the image quality to fit on a standard DVD disc, but the format remains in HD. Some editing software may reduce the image quality to fit on a standard DVD disc, but the format remains in HD.  This may cause compatability issues. HD DVD’s are Blu-Ray. HD DVD’s are Blu-Ray.

Next Class We will have a worksheet about graphics and video files. We will have a worksheet about graphics and video files. You may use your notes from today and the Internet. You may use your notes from today and the Internet.