我如何使用AVAssetWriter？ [英] How do I use AVAssetWriter?

问题描述

我想拍摄一些视频帧并将其编码为视频。看起来这正是 AVAssetWriter 的意思，但无论我如何看待文档和谷歌我都找不到任何实际使用它的方法。从文档看起来我需要一个输入（ AVAssetWriterInput ）来从中提供编写器。精细。但是 AVAssetWriterInput 类是抽象的，我在4.1中知道的唯一子类是 AVAssetWriterInputPixelBufferAdaptor ，它需要 AVAssetWriterInput 在其初始化程序中......？我错过了一些明显的东西吗？

I’d like to take some video frames and encode them into a video. It looks like that’s exactly what AVAssetWriter was meant for, but no matter how I eyeball the docs and Google I can’t find any way to actually use it. From the docs it looks like I need an input (AVAssetWriterInput) to feed the writer from. Fine. But the AVAssetWriterInput class is abstract and the only subclass that I know of in 4.1 is AVAssetWriterInputPixelBufferAdaptor that requires a AVAssetWriterInput in its initializer…? Am I missing something obvious here?

推荐答案

啊是的，我必须使用 + [获取一个实例AVAssetWriterInput assetWriterInputWithMediaType：outputSettings：] ，请参阅我的发布根据不同的问题提供详细的代码示例。

Ah yes, I have to acquire an instance using +[AVAssetWriterInput assetWriterInputWithMediaType:outputSettings:], see my post under a different question for a detailed code sample.

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