[AVFoundation] Preview with AVCaptureMovieFileOutput - QiitaAVCaptureVideoPreviewLayerとAVCaptureMovieFileOutputを使ってカメラ映像を見ながら録画する方法をメモ。なんでこんなこと書くかというとAVFoundationではAVCaptureVideoOutputとAVCaptureMovieFileOutputは同時には使えないっぽいので、このPreviewLayerというものを使って同時に見るしかないみたい。 参考：StackOverflow 必要なFramework Foundation AVFoundation CoreMedia CoreVideo AssetLibrary (カメラロールに保存するのなら必要) 必要なクラス 詳しいことはAVFoundationの仕様を読んでもらった方がいいけれど、今回必要なものは以下。 AVCaptureSession : InputとOutputの橋渡し的な
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