Hi3536运行ffmpeg

有大佬在Hi3536平台交叉编译过ffmpeg吗，我编译了动态库，然后C++程序里使用相关函数时候make一直报未定义引用错误，求助大佬。
这是我的makefile文件：

CPP = arm-hisiv400-linux-g++
CPPFLAGS = -Wall -g -D__STDC_CONSTANT_MACROS
REL_DIR = /home/hi3536/Documents/Hi3536_SDK_V2.0.6.0/mpp_master
REL_INC = $(REL_DIR)/include
REL_LIB = $(REL_DIR)/lib
MPI_LIBS = $(REL_LIB)/libmpi.a
MPI_LIBS += $(REL_LIB)/libhdmi.a
AUDIO_LIBS  = $(REL_LIB)/libVoiceEngine.a
AUDIO_LIBS += $(REL_LIB)/libupvqe.a
AUDIO_LIBS += $(REL_LIB)/libdnvqe.a
FFMPEG_LIB = /home/hi3536/nfs_dir/ffmpeg/lib/  #ffmpeg动态库和静态库位置
LIBS  = -lpthread -lm -ldl -ljrtp -ljthread -L $(FFMPEG_LIB) -lavcodec -lavformat -lavutil -lswscale -lswresample
LIBS += $(MPI_LIBS)
LIBS += $(AUDIO_LIBS)
COMMON_PATH = ../public
INC  = -I$(REL_INC)
INC += -I./
INC += -I$(COMMON_PATH)/base
INC += -I$(COMMON_PATH)/es
INC += -I$(COMMON_PATH)/rtp
INC += -I$(COMMON_PATH)/jrtp
INC += -I$(COMMON_PATH)/common
INC += -I/home/hi3536/Downloads/jrtplib-3.11.2/src
INC += -I/home/hi3536/nfs_dir/ffmpeg/include # 编译的ffmpeg头文件位置
SRC_DIR = . $(COMMON_PATH)/base $(COMMON_PATH)/es $(COMMON_PATH)/jrtp $(COMMON_PATH)/rtp 
SRCCPP = $(shell find $(SRC_DIR) -name "*.cpp")
OBJCPP = $(SRCCPP:%.cpp=%.o)
OBJS = $(OBJCPP)
ELF = hi3536_client
$(ELF): $(OBJS)
    $(CPP) $(CPPFLAGS) -o $(ELF) $(OBJS) $(LIBS)
.cpp.o:
    $(CPP) $(CPPFLAGS) $(INC) -c $(@D)/$(<F) -o $(@D)/$(@F)
clean:
    $(RM) $(OBJS)
cleanup:
    $(RM) $(OBJS) $(ELF)

然后报错是这样的：