How do I use AVAssetWriter?

Question

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?

Answer 1

是的，我必须使用+[AVAssetWriterInput assetWriterInputWithMediaType:outputSettings:]获取一个实例，请参阅我的帖子，在一个不同的问题下获取详细的代码示例。