@interface WKFileUploadMediaTranscoder : NSObject { struct RetainPtr<NSTimer> { void *m_ptr; } _progressTimer; struct RetainPtr<PXActivityProgressController> { void *m_ptr; } _progressController; struct RetainPtr<AVAssetExportSession> { void *m_ptr; } _exportSession; struct RetainPtr<NSArray<_WKFileUploadItem *>> { void *m_ptr; } _items; struct RetainPtr<NSString> { void *m_ptr; } _temporaryDirectoryPath; struct Function<void (NSArray<_WKFileUploadItem *> *)> { struct unique_ptr<WTF::Detail::CallableWrapperBase<void, NSArray<_WKFileUploadItem *> *>, std::default_delete<WTF::Detail::CallableWrapperBase<void, NSArray<_WKFileUploadItem *> *>>> { struct __compressed_pair<WTF::Detail::CallableWrapperBase<void, NSArray<_WKFileUploadItem *> *> *, std::default_delete<WTF::Detail::CallableWrapperBase<void, NSArray<_WKFileUploadItem *> *>>> { void *__value_; } __ptr_; } m_callableWrapper; } _completionHandler; unsigned long long _videoCount; unsigned long long _processedVideoCount; } - (void)start; - (id).cxx_construct; - (void).cxx_destruct; - (void)_dismissProgress; - (void)_finishedProcessing; - (void)_processItemAtIndex:(unsigned long long)a0; - (id)_temporaryDirectoryCreateIfNecessary; - (void)_updateProgress:(id)a0; - (id)initWithItems:(id)a0 videoCount:(unsigned long long)a1 completionHandler:(void *)a2; @end