#define AVERROR_PATCHWELCOME (-MKTAG( 'P','A','W','E')) ///< Not yet implemented in Libav, patches welcome
#define AVERROR_PROTOCOL_NOT_FOUND (-MKTAG(0xF8,'P','R','O')) ///< Protocol not found
#define AVERROR_STREAM_NOT_FOUND (-MKTAG(0xF8,'S','T','R')) ///< Stream not found
+#define AVERROR_BUG (-MKTAG( 'B','U','G',' ')) ///< Bug detected, please report the issue
/**
* Put a description of the AVERROR code errnum in errbuf.