音频（2）：About Audio and Video

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About Audio and Video

关于音频和视频

Whether multimedia features are central or incidental to your application, iPhone, iPod touch, and iPad users expect high quality. When presenting video content, take advantage of the device’s high-resolution screen and high frame rates. When designing the audio portion of your application, keep in mind that compelling sound adds immeasurably to a user’s overall experience.

无论多媒体功能对你的应用程序来说是处于核心位置还是附带的内容，iPhone、iPod touch以及iPad用户都希望它是高质量的。当提供视频内容的时候，利用设备的高分辨率的屏幕和高帧速率。当设计你的应用程序的音频部分的时候，记住无限的增加声音的吸引力来提高用户的整体体验。

You can take advantage of the iOS multimedia frameworks for adding features like:

你可以利用iOS多媒体框架来添加如下功能：

• 高质量的音频录制、回放以及流。

• 身临其境的游戏声音。

• 生动的语音聊天。

• 播放用户iPod库中的内容。

• 在支持的设备上播放和录制视频。

High-quality audio recording, playback, and streaming

Immersive game sounds

Live voice chat

Playback of content from a user’s iPod library

Video playback and recording on supported devices

In iOS 4.0 and later, the AV Foundation framework gives you fine-grained control over inspecting, editing, and presenting audio-visual assets.

在iOS 4.0 及以后版本，AV Foundation 框架让你可以精细的控制检查、编辑以及呈现视听资料。

Organization of This Document

本文档的组织

This document contains the following chapters:

本文档包含以下章节：

* “Using Audio”显示如何使用系统的音频技术来播放和录制音频。

* “Using Video” 显示如何使用系统的视频技术来播放和获取视频。

“Using Audio” shows how to use the system’s audio technologies to play and record audio.

“Using Video” shows how to use the system’s video technologies to play and capture video.

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