Книга: Fedora™ Unleashed, 2008 edition
Video Formats
Video Formats
Fedora recognizes a variety of video formats. The formats created by the MPEG group, Apple, and Microsoft dominate, however. At the heart of video formats are the codecs — the encoders and decoders of the video and audio information. These codecs are typically proprietary, but free codecs do exist. Here is a list of the most common video formats and their associated file extensions:
? .mpeg —The MPEG video format; also known as .mpg
? .qt — The QuickTime video format from Apple
? .mov — Another QuickTime video format
? .avi — The Windows audio visual format
TIP
An RPM that provides a Divx codec for Linux can be found at http://www.freshrpms.net/. Divx is a patented MPEG-4 video codec that is the most widely used codec of its type. It allows for compression of MPEG-2 video by a factor of 8. See http://www.divx. com/ for more information.
The GetCodecs application is a Python script with a GUI interface that downloads, installs, and configures your Fedora system with multimedia codecs not provided by Fedora, such as MP3, Divx, and DVD codecs. The script can be obtained from http://sourceforge.net/projects/getcodecs/.
If you need to convert video from one format to another, you use encoder applications called grabbers. These applications take raw video data from a video device such as a camera or TV card, and convert it to one of the standard MPEG formats or to a still image format, such as JPEG or GIF. Fedora does not supply any encoder applications (other than ppmtompeg, which encodes MPEG-1 video), but you can find them at http://www.freshrpms.net/ or another online source (see the "Reference" section at the end of this chapter).
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