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Digital Video

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Digital Video Lesson Objectives After completing this lesson, you will be able to: Identify the characteristics of digital video. Explain what digital video editing ... – PowerPoint PPT presentation

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Title: Digital Video


1
                     
Digital Video
2
Lesson Objectives
  • After completing this lesson, you will be able
    to
  • Identify the characteristics of digital video.
  • Explain what digital video editing is and the
    various output formats for digital video.
  • Identify the features of different Web video
    technologies.

3
Characteristics of Digital Video
  • One of the important characteristics of digital
    videos is that you can edit them easily on a
    computer by using digital video editing software.
    For example, you can
  • edit videos to include titles, add a sound track,
    or add special effects.
  • upload the video to a Web site and share it over
    the Internet.
  • copy the video from a computer to a recordable CD
    or DVD.
  • Another characteristic of digital videos is
    that they can be compressed.

4
Types of Camcorders
  1. Analog Camcorder
  2. Digital Camcorder

5
Types of CamcordersAnalog Camcorder
  • An analog camcorder records and stores video in
    an analog format on a tape.
  • To edit the video on a computer, you need to
    convert it from the analog format to the digital
    format.

6
Types of CamcordersDigital Camcorder
  • A digital camcorder records and stores video in a
    digital format.
  • An advantage of using the digital camcorder is
    that the recorded video is easy to edit because
    it is stored in a digital format.
  • Another advantage is that a digital camcorder is
    generally lighter and smaller than an analog
    camcorder.

7
Digital Video Editing
  • Using digital video editing software, you can
  • Add titles and background music to your video to
    make it more appealing.
  • Cut or remove certain scenes from the video.
  • Add special effects, such as fade-in and
    fade-out, to the video.
  • Enhance video quality by adjusting its
    brightness, contrast, and color.
  • Record audio over the video to describe certain
    scenes.

8
Digital Video Editing
  • Digital video editing can either be linear or
    nonlinear
  • Linear editing - you have to sequentially
    traverse a file to edit the file.
  • Nonlinear editing - You can directly go to the
    frame and remove it from your video.

9
Digital Video Output Formats
  • After you edit a video, you can store it in
    various formats
  • You can use software to capture a frame from a
    movie and save it as a still image.
  • You can also edit the video and save it as a
    video clip in the Windows Media Video (WMV)
    format.
  • You can also share the video clip with your
    friends by uploading it to a Web site or sending
    it by e-mail.
  • You can save the edited video clips and still
    images in a format that can be copied to a
    recordable DVD or Video CD (VCD).

10
Web Video Technologies Video Streaming
  • Video streaming allows you to view video files
    over the Internet without downloading them.
  • In this case, the video file is sent to your
    computer in a continuous stream.
  • You need a streaming video player to view the
    video file over the Internet.
  • You might need to download a streaming video
    player and install it on your computer before you
    can play the video files.

11
Web Video Technologies Two Types of Video
Streaming
  • In real-time video streaming
  • you can view a live event over the Internet.
  • a camera is used to capture the live event.
  • a converter is used to convert the video into the
    video streaming format so that the video can be
    broadcast over the Internet.
  • In on-demand video streaming
  • a video is taken from a storage device, such as
    a CD or DVD, and converted into a streaming video
    format.
  • This video is then distributed over the Internet.

12
Downloading Video
  • You can also download video files, such as video
    clips or video presentations, from the Internet.
  •  
  • Sometimes, when you are downloading a file, you
    can play the file after a major portion of the
    file is downloaded, but usually you need to wait
    until the entire file is saved on your computer.

13
Web Conferencing
  • Web Conferencing allows you to
  • hold a virtual conference where you can see and
    hear others in real time.
  • use tools such as virtual whiteboards and slide
    presentations during the conference.
  • Can do screen sharing, where the participants can
    see what is on the presenters desktop.
  • voice communication between the participants so
    that they can share their views and discuss their
    opinions.
  •  use text chatting if voice communication is not
    possible.

14
Questions
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