模拟器运行报错：
报错信息如下：
Undefined symbols for architecture x86_64:
"_x264_encoder_open_142", referenced from:
H264_Open_uni(int, int, int, int, int) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_Open(int, int, int, int, int) in RtSDK(ffcodec.o)
"_x264_encoder_headers", referenced from:
H264_Open_uni(int, int, int, int, int) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_Open(int, int, int, int, int) in RtSDK(ffcodec.o)
"_x264_param_default", referenced from:
H264_Open_uni(int, int, int, int, int) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_Open(int, int, int, int, int) in RtSDK(ffcodec.o)
"_x264_param_apply_profile", referenced from:
H264_Open_uni(int, int, int, int, int) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_Open(int, int, int, int, int) in RtSDK(ffcodec.o)
"_x264_encoder_encode", referenced from:
H264_EncodeFrame_uni(H264_Context*, unsigned char*, unsigned int, unsigned char**, unsigned int*) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_EncodeFrame(H264_Context*, unsigned char*, unsigned int, unsigned char**, unsigned int*) in RtSDK(ffcodec.o)
"_x264_encoder_close", referenced from:
H264_Open_uni(int, int, int, int, int) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_Close_uni(H264_Context*) in libPlayerSDKLib.a(ffcodec_uni.o)
H264_Open(int, int, int, int, int) in RtSDK(ffcodec.o)
H264_Close(H264_Context*) in RtSDK(ffcodec.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code (use -v to see invocation)
是libPlayerSDKLib这个库有问题
这个库包含在ffmpeg的库里面，
把整个ffmpeg库替换就好了。