xcode VideoToolbox.framework 如何工作？
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How Does VideoToolbox.framework work?
提问by PatrickSCLin
iOS8 just released beta version, I'm very interested in Video directly Encoding / Decoding.
iOS8 刚刚发布测试版，我对视频直接编码/解码很感兴趣。
Video Toolbox Framework
The Video Toolbox framework (VideoToolbox.framework) includes direct access to hardware video encoding and decoding.
视频工具箱框架
视频工具箱框架（VideoToolbox.framework）包括对硬件视频编码和解码的直接访问。
but I can not find any tutorial documents for this right now
但我现在找不到任何教程文档
as I know it's a private framework before, and some people already using it in some JB apps
据我所知，它以前是一个私有框架，有些人已经在某些 JB 应用程序中使用它
so does anyone can share a very simple tutorial code for this ?
那么有人可以为此分享一个非常简单的教程代码吗？
采纳答案by Matt S.
Import the framework and look at the headers, they're all documented.
导入框架并查看标题，它们都已记录在案。
Apple also released a sample using VTDecompressionSession
苹果还发布了一个使用 VTDecompressionSession的示例
回答by Lukasz Czerwinski
Try this link: https://github.com/davidliu/VideoTimeLine(the video which I loaded seems to be broken, but you can get a feel how to use it).
Write in XCode:
import VideoToolboxandCMVideoFormatDescriptionCreateFromH264ParameterSetsand Cmd+click on it to display documentation :)Take a look at this video from WWDC: https://developer.apple.com/videos/wwdc/2014/#513
Check out this code: https://github.com/manishganvir/iOS-h264Hw-Toolbox
Check out this code: https://github.com/McZonk/VideoToolboxPlus
You might also want to see a detailed description on how to decompress H264 using VideoToolbox: How to use VideoToolbox to decompress H.264 video stream
试试这个链接：https: //github.com/davidliu/VideoTimeLine（我加载的视频好像坏了，但你可以感受一下如何使用它）。
写入 XCode:
import VideoToolbox和CMVideoFormatDescriptionCreateFromH264ParameterSetsCmd+单击它以显示文档:)看看来自 WWDC 的这个视频：https: //developer.apple.com/videos/wwdc/2014/#513
您可能还想查看有关如何使用 VideoToolbox 解压缩 H264 的详细说明：How to use VideoToolbox to decompress H.264 video stream
Hope that helps :)
希望有帮助:)
