Chapter 2 introduces relevant techniques of Multimedia Terminals, including the selection of mainstream hardware and software platform, video-audio codec techniques and etc.
第二章介绍了多媒体终端的相关技术，包括主流软硬件平台选择和音视频编解码技术。
Google has recently announced WebM, an open source, royalty free media file format consisting of the following components: VP8 video codec, Vorbis audio codec, and the Matroska media container.
近日，Google开源了WebM——用于视频压缩与编码的免费媒体文件格式，它主要包含如下组件：VP8视频codec、Vorbis音频codec以及Matroska媒体容器。
You can choose video and audio codec and quality.
你可以选择视频和音频解码标准和质量。
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