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Web连续调用了两次startWriting说明在状态改变之前又有新的回调函数调用了,猜想视频数据包和音频数据包处理是在不同线程进行的,几乎同时调用了回调函数,而回调函数并没有采用任何的线程锁机制,导致startWriting被调用了两次,从而引起AVAssetWriterStatusFailed错误,而偶尔成功的几次,应该是多线程 ... WebMay 7, 2024 · Method 1. PtrToStringChars gives you an interior pointer to the actual String object. If you pass this pointer to an unmanaged function call, you must first pin the pointer to ensure that the object does not move during an asynchronous garbage collection process: c++. //#include System::String * str = S"Hello world\n"; const __wchar_t ... function of hcl in stomach is to
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