VIDEO

Topic Outline What is digital video. How to create and edit digital video. Digital video file format. How to use digital video in multimedia product.

Video A moving pictures. Videos allow the audience to view actual events instead of just reading about or listening to them.

DIGITAL VIDEO Digital video is recorded digitally, as ones and zeros. Since it is stored in a digital format, digital video can be recognized and edited by a computer, which is also a digital device.

SOURCE OF DIGITAL VIDEO Recording of live action. Series of graphic images played in rapid succession similar to cartoon. videos from web sites.

The file format of the digital video determines: Which softwares can open and play it. How much storage space it occupies. How fast it travels over an Internet connection.

Video File Formats AVI (Audio Video Interleave) MOV (Movie) Windows format, plays in Windows Media Player Very good quality, even at smaller resolutions Large file size – not recommended for delivering video over the Internet. Popular format for videos stored on a computer. MOV (Movie) Apple format, plays in the QuickTime Player Very good quality Popular format for videos downloaded from the Internet. Teacher Note: The most common player has been listed. Other players may play the video files. For example, QuickTime will play a large variety of files besides .mov files.

Video File Formats MPEG (Moving Pictures Expert Group) RM (RealMedia) The standard for compression and storage of audio and motion video for use on the World Wide Web. Creates video small file sizes. Popular format for videos downloaded from the Internet. Its biggest advantage is that it will play in many different media players. RM (RealMedia) Plays in the RealPlayer player. Typically contains a movie clip. Popular format for streaming video viewed over the Internet. Real Player is generally supported by many different computers and operating systems.

Video File Formats WMV (Windows Media Video) FLV (Flash Video) Proprietary video format developed by Microsoft. Plays in Windows Media Player. Popular format for streaming video viewed over the Internet. FLV (Flash Video) New file format widely used on the Internet. Plays in Adobe Flash Player. Very small file size. Popular format for streaming video viewed over the Internet

CHARACTERISTICS OF DIGITAL VIDEO A frame is a single image in a video sequence. 3 basic characteristics: Frame Rate: Number of images displayed within a specified amount of time to convey a sense of motion. Frame rate is usually describes in frames per second (fps). 30 frames per second

CHARACTERISTICS OF DIGITAL VIDEO-cont Frame Size/Image Size: The height and width of each individual frame. Color Depth or Resolution: The amount of color for each pixel within each frame or image.

COLOR DEPTH Refer to the number of colors displayed on the screen at one time. Computer deal with RGB color (Red- green-Blue) format. It’s ranging from 1 bit-2 color, 8bits-256 color,16 bit-65,535 color and 24 bit- 16.7million color).

… Characteristics of digital video Frame Size : height and width of a frame (measured in pixels) … Video Frame 1 Video Frame 2 Video Frame 3 Color Depth : number of colors per image, related to number of bits per color (24 bits for 16 million color) Frame Rate : number of frames displayed over a period of time (second)

SOFTWARE FOR VIDEO EDITING Gold Disk’s Astound Studio Adobe Premiere Adobe After Effects

USING VIDEO Used it for information delivery and present complex information. Choose most appropriate video file. Not too much transition and special effect cause delay in rendering process. Try to have smaller file. If the capturing and editing software is different, make sure to set it to standard format so it can be used in both process.

DIGITAL VIDEO SOFTWARE Come in 3 basic forms: Video capture. Video editing. Video playback applications. Video Capture : Used to control video capture height & width. Include ability to control video signal input; color and brightness. Control frame rate, frame size, color depth, and audio sampling.

DIGITAL VIDEO SOFTWARE Video Editing : Copy, cut, paste and delete video frames. Combine frames from 2 or more video data sources. Changing size or frame rate of the video data segments. Editing audio by remove, copy or adding. Adding special effect to video clips such as titles or transitions between video segments.

DIGITAL VIDEO SOFTWARE Video Playback: Play the video within a window or full screen application with controls to play, pause, stop, rewind, fast forward and frame advance or retreat. User can jump around the video by pointing to certain location of the frame video.

SPECIAL EFFECT Transition: Filters: Such as fading, wiping, splatters, scrolling, stipple, fade-in and etc. Filters: To create emboss, zoom, pan, twist and etc.

Videos can be used in: CD-ROMS Games Presentation Videoconferences Websites.