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在common.h
#ifndef AVUTIL_COMMON_H
#define AVUTIL_COMMON_H下添加
#define lrint(f) (f>=0?(int32_t)(f+(double)0.5):(int32_t)(f-(double)0.4))
#define lrintf(f) (f>=0?(int32_t)(f+(float)0.5):(int32_t)(f-(float)0.4))
#define llrintf(f) (f>=0?(int64_t)(f+(double)0.5):(int64_t)(f-(double)0.4))
#define llrint(f) (f>=0?(int64_t)(f+(float)0.5):(int64_t)(f-(float)0.4))
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原文地址:http://www.cnblogs.com/qq76211822/p/4968844.html