Graphics and Video

File Types, Uses and AttributesFile Types, Uses and Attributes

Please take notes!Please take notes!

Picture/Drawing File Types

There are two main ways computers handle There are two main ways computers handle and create images.and create images.

The first are the bit-mapped file types.The first are the bit-mapped file types. Programs using this type include:Programs using this type include:

PhotoshopPhotoshopWindows PaintWindows PaintPainter ClassicPainter ClassicPhoto EditorPhoto Editor

File Formats - Bit Mapped

.jpg.jpg .tif.tif .bmp.bmp .png.png .raw.raw .gif.gif And many othersAnd 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 Many types are not good for use on the

Internet because of their size.Internet because of their size. Compression can be used to reduce the file Compression can be used to reduce the file

size of the image.size of the image. Examples: .tiff , jpg, gifExamples: .tiff , jpg, gif

Some compression schemes lose noticeable Some compression schemes lose noticeable amounts of quality.amounts of quality.

Vector-Based Graphics

Vector-based graphics are based upon Vector-based graphics are based upon mathematical formulas.mathematical formulas. These scale very well.These scale very well. Some printers such as post-script printers Some printers such as post-script printers

use vector-based images to create fonts.use vector-based images to create fonts. CAD programs are vector-based.CAD programs are vector-based. Vector-Based images do well with line Vector-Based images do well with line

drawings, but do poorly with photo-drawings, but do poorly with photo-realistic imagesrealistic images

Vector-Based Programs

All CAD ProgramsAll CAD Programs FreehandFreehand Adobe IllustratorAdobe Illustrator Corel DrawCorel Draw Appleworks DrawAppleworks Draw Google SketchUpGoogle 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 Huge file size. Image broken down into

pixels. Used for wallpaper, etc. in pixels. Used for wallpaper, etc. in WindowsWindows

.tif.tif High quality – large file size, even when High quality – large file size, even when

compressed. Used for printing.compressed. Used for printing.

Graphics files

.jpg.jpg Used for the Internet. Heavily Used for the Internet. Heavily

compressed. Looks okay on-screen. Not compressed. Looks okay on-screen. Not so good for printing.so good for printing.

.gif.gif Used for the Internet. Very heavily Used for the Internet. Very heavily

compressed. Limited color depth. Can compressed. Limited color depth. Can support transparent color and limited support transparent color and limited animation.animation.

Graphics files

When you compress a file and overwrite it When you compress a file and overwrite it you lose detail that cannot be restored.you lose detail that cannot be restored.

A 5kb .jpg balloons to 250kb when saved as A 5kb .jpg balloons to 250kb when saved as a bit map with no increase in image quality.a bit map with no increase in image quality.

Graphics Files

Always keep in mind your end use when Always keep in mind your end use when selecting a file type.selecting a file type.

Use graphics programs to translate from Use graphics programs to translate from one file-type to another by doing a “Save one file-type to another by doing a “Save As”.As”.

Video files

Video files by their nature are rather large.Video files by their nature are rather large. .avi offers best quality.avi offers best quality

At full resolution count on 1.5 At full resolution count on 1.5 gig/minutegig/minute

Files can be compressed into one of Files can be compressed into one of several file types. Each has its own several file types. Each has its own advantages/disadvantagesadvantages/disadvantages

Video Files

Major file typesMajor file types .avi.avi .mpg (mp1, mp2, mp3, mp4).mpg (mp1, mp2, mp3, mp4) .wma.wma .divix.divix HCL (HD file type from Sony)HCL (HD file type from Sony) HDVHDV QuicktimeQuicktime

Video Files

Streaming vs. DownloadableStreaming vs. Downloadable Streaming can be viewed but cannot be Streaming can be viewed but cannot be

saved without special software.saved without special software. Downloadable files take a great deal of Downloadable files take a great deal of

time to copy. time to copy. .wma file types support both. .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. Windows Media Player files can be either.

It comes in both flavors.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 .avi – Used for full-resolution applications such

as editing. Can be used in PowerPoint.as editing. Can be used in PowerPoint. .mpg – Used for compressed video. Has many .mpg – Used for compressed video. Has many

variations. Can be edited but it is not variations. Can be edited but it is not recommended.recommended.

.wma – Windows Media Player. Can be used in .wma – Windows Media Player. Can be used in PowerPoint. Offers different compression PowerPoint. Offers different compression levels.levels.

Video Files

DIVIXDIVIX Often used for moviesOften used for movies Files highly compressedFiles highly compressed Students like these filesStudents like these files Player software used to be free and Player software used to be free and

widely available. Now most charge.widely available. Now most charge. Runs on Laptops and portable devicesRuns on Laptops and portable devices

Video Files

.VOB – Used for DVD’s - Video object .VOB – Used for DVD’s - Video object file.file.

Special players can be used to play this file Special players can be used to play this file type such as WinDVD.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 There are video formats that were created specifically for HD.specifically for HD. HCLHCL HDVHDV

Others have been adapted for HDOthers have been adapted for HD AVIAVI MP4/QuicktimeMP4/Quicktime

High Definition Video

Special software may be needed to reduce Special software may be needed to reduce HD footage to SD.HD footage to SD.

Some editing software may reduce the Some editing software may reduce the image quality to fit on a standard DVD disc, image quality to fit on a standard DVD disc, but the format remains in HD.but the format remains in HD. This may cause compatability issues.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 We will have a worksheet about graphics and video files.and video files.

You may use your notes from today and the You may use your notes from today and the Internet.Internet.