Step1:
修改library.mak的52行
$(SLIB_CREATE_DEF_CMD) //修改前
EXTERN_PREFIX="$(EXTERN_PREFIX)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(SUBDIR)*.o > $$(@:$(SLIBSUF)=.def)//修改后
Step2:
make V=1 libavcodec/avcodec-58.dll (执行这个命令,单独生成所需dll文件)
参考
https://stackoverflow.com/questions/53852242/ffmpeg-mingw-compilation-8192-char-limits
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