chapter 16 creating desktop video and animation. getting started faqs: – what is digital video?...

Chapter 16Creating Desktop

Video and Animation

Getting Started

• FAQs:– What is digital video?– How do I transfer video footage to my computer?– How do I edit a digital video?– How do I finalize my video for DVDs, Web sites, and other

uses?– What are the most popular video formats?– What is a codec?– What about animation?

2Practical PC 6th Edition Chapter 16

What is digital video?

• Video is a series of still frames projected at a rate fast enough to appear to have continuous motion

• Digital video uses bits to store color and brightness data for each pixel in a video frame– Easy to post, view, and download digital videos– Maintains quality no matter how many times copied– Easily manipulated on a personal computer– Store on CDs, DVDs, videotapes, memory cards, or the

Web– Display on a computer screen with video player software


What is digital video?


How do I transfer video footage to my computer?

• The video must be on your hard disk to view and edit– Digital camera: Connect camera to computer with cable

and use video editing software to edit photos and control data transfer

– VHS tape, analog video camera, or television broadcast: Convert into digital data stream using video capture device

– DVDs: DVD ripping and decryption software can convert, decrypt, and copy your DVD to your computer

– Cell phone: Connect cell phone using cable or e-mail the video to computer


How do I transfer video footage to my computer?


How do I edit a digital video?

• Video editing software helps cut unwanted frames, add special effects, arrange segments, overlay a soundtrack, and designate transitions

• Wide variety of video-editing software available• To edit a digital video

– Open your video editing software– Import any files you want in the final video– Drag the elements onto a storyboard– Add transfer effects, if desired– Add titles and other special effects


How do I edit a digital video?


How do I finalize my video for DVDs, Web sites, and other uses?

• Video settings depend on intended use– Some software allows you to select a use:

• Sending as an e-mail attachment• Posting on Web• Publishing it on YouTube• Viewing from hard disk

– You can also manually select settings:• Aspect ratio refers to relative height and width of video frame• Display size corresponds to the resolution of video window• Frame rate is number of frames displayed per second

• Videos intended for DVD use need to be laid out in DVD-Video format


How do I finalize my video for DVDs, Web sites, and other uses?


What are the most popular video formats?

• There is no standard file format. Digital video file formats, sometimes called container formats, are a receptacle for video elements– Quick Time Movie (MOV): Apple QuickTime Player– Advanced System Format (ASF): Windows Media Video– Audio Video Interleave (AVI): An original format; used with open source

players– MPEG (MP4 & M4V): Variety of formats; used by iTunes store– Flash Video (FLV): Proprietary video format used on YouTube, CNN.com,

and other Web sites; uses .flv and .swf extensions– RealMedia: RealPlayer multimedia software; .rm extension– Video Object File (VOB): Used with commercial DVDs– Ogg: open source container

• Videos can be converted from one format to another using a process called transcoding


What’s a codec?

• Codec (compressor/decompressor) is software that compresses video stream when stored and decompresses it when played

• Locate and download the appropriate codec to view a video• Each codec uses a unique algorithm to shrink the file

− Compression ratio indicates the ratio of compressed data to uncompressed data

− Bit rate refers to the amount of data transferred per second

− Lower bit rates download smoother but are usually lower quality than high bit rates


What’s a codec?


What about animation?

• Computer animation, sometimes referred to as CGI (computer-generated imagery), generates moving images from 2-D or 3-D objects– In hand-drawn animation, a chief artist draws keyframes and

then assistants create the in-between images (24 images per second)

− With computer animation, a computer creates the in-between images

• Graphics design companies use 3-D animation techniques to produce films, such as Toy Story

• You can create 3-D animations by using software, which is available in varying degrees of complexity and price levels


What about animation?


Hardware: Digital camcorders• A digital camcorder is a portable electronic device that

captures and records visual and auditory elements of a scene containing moving objects– Budget camcorders are priced below $300 and are suitable

for home movies– Amateur videographers can step up to a prosumer-quality

camera in the $400 to $1,000 price range– Professional videographers and independent filmmakers

can easily pay $5,000


Hardware: Digital camcorders

• Digital camcorders are available in standard definition (SD) and high-definition (HD) models



• A digital camcorder performs two major functions:– Captures a series of images using camera components– Stores images using recorder components

• To capture an image– The camera’s lens focuses light onto a charge-coupled

device (CCD)• Grid of light-sensitive diodes called photosites



• After an image is captured, the image data is stored using the camcorder’s recorder components– Memory cards– Solid state hard drive (SSD)– Built-in hard drive– Mini-DVD or Blu-ray– MiniDV tape


Dead celebrities live again

• What do you think?– Have you seen deceased celebrities featured in any recent

TV ads or films?– Do you think that multimedia developers should have the

right to create a digital character by digitizing a celebrity look-alike?

– Should laws prohibit the creation of digital characters based on the composite traits of several deceased celebrities?


chapter 16 creating desktop video and animation. getting started faqs: – what is digital video?...

Documents

edition chapter

practical pc

video footage

video settings

desktop video

video frameeasy

video player software

dvdvideo format