Undefined symbols for architecture x86_64:
  "_x264_bit_depth", referenced from:
      _X264_init_static in libavcodec.a(libx264.o)
      _X264_frame in libavcodec.a(libx264.o)
  "_x264_encoder_close", referenced from:
      _X264_close in libavcodec.a(libx264.o)
  "_x264_picture_init", referenced from:
      _X264_frame in libavcodec.a(libx264.o)
  "_x264_encoder_reconfig", referenced from:
      _X264_frame in libavcodec.a(libx264.o)
  "_x264_encoder_encode", referenced from:
      _X264_frame in libavcodec.a(libx264.o)
  "_x264_encoder_delayed_frames", referenced from:
      _X264_frame in libavcodec.a(libx264.o)
  "_x264_param_default", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_x264_param_default_preset", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_x264_param_parse", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_x264_param_apply_fastfirstpass", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_x264_param_apply_profile", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_x264_encoder_open_125", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_x264_encoder_headers", referenced from:
      _X264_init in libavcodec.a(libx264.o)
  "_kCFAllocatorDefault", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_CFDataCreate", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_kCFTypeDictionaryKeyCallBacks", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_kCFTypeDictionaryValueCallBacks", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_CFDictionaryCreateMutable", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_CFNumberCreate", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_kVDADecoderConfiguration_Height", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_CFDictionarySetValue", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_kVDADecoderConfiguration_Width", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_kVDADecoderConfiguration_SourceFormat", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_kVDADecoderConfiguration_avcCData", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_kCVPixelBufferPixelFormatTypeKey", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_kCVPixelBufferIOSurfacePropertiesKey", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_VDADecoderCreate", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_CFRelease", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_CFDictionaryCreate", referenced from:
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_VDADecoderDecode", referenced from:
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_CVPixelBufferRelease", referenced from:
      _ff_vda_release_vda_frame in libavcodec.a(vda.o)
      _ff_vda_destroy_decoder in libavcodec.a(vda.o)
  "_VDADecoderDestroy", referenced from:
      _ff_vda_destroy_decoder in libavcodec.a(vda.o)
  "_CVPixelBufferGetPixelFormatType", referenced from:
      _vda_decoder_callback in libavcodec.a(vda.o)
  "_CVPixelBufferRetain", referenced from:
      _vda_decoder_callback in libavcodec.a(vda.o)
  "_CFDictionaryGetValue", referenced from:
      _vda_decoder_callback in libavcodec.a(vda.o)
  "_CFNumberGetValue", referenced from:
      _vda_decoder_callback in libavcodec.a(vda.o)
  "___CFConstantStringClassReference", referenced from:
      CFString in libavcodec.a(vda.o)
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status