ffmpeg编译过程遇到的问题

遇到问题：

头文件找不到

libavformat/avformat.h file not found

解决方法：

Library Search Paths,Header Search Paths,两个要设置，要是还不行，Project和Targets的都要设置

遇到问题

Undefined symbols for architecture armv7s:

  "_sws_scale", referenced from:

      -[VideoFrameExtractor convertFrameToRGB] in VideoFrameExtractor.o

  "_avcodec_close", referenced from:

      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o

  "_av_free", referenced from:

      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o

  "_avcodec_flush_buffers", referenced from:

      -[VideoFrameExtractor seekTime:] in VideoFrameExtractor.o

  "_avpicture_free", referenced from:

      -[VideoFrameExtractor setupScaler] in VideoFrameExtractor.o

      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o

  "_sws_freeContext", referenced from:

      -[VideoFrameExtractor setupScaler] in VideoFrameExtractor.o

      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o

  "_av_read_frame", referenced from:

      -[VideoFrameExtractor stepFrame] in VideoFrameExtractor.o

  "_avpicture_alloc", referenced from:

      -[VideoFrameExtractor setupScaler] in VideoFrameExtractor.o

  "_sws_getContext", referenced from:

      -[VideoFrameExtractor setupScaler] in VideoFrameExtractor.o

  "_avcodec_decode_video2", referenced from:

      -[VideoFrameExtractor stepFrame] in VideoFrameExtractor.o

  "_avformat_seek_file", referenced from:

      -[VideoFrameExtractor seekTime:] in VideoFrameExtractor.o

  "_avcodec_register_all", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_avformat_find_stream_info", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_avformat_open_input", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_avformat_close_input", referenced from:

      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o

  "_avcodec_alloc_frame", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_av_find_best_stream", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_av_register_all", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_avcodec_find_decoder", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_av_free_packet", referenced from:

      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o

  "_avcodec_open2", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

  "_av_log", referenced from:

      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o

ld: symbol(s) not found for architecture armv7s

clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决方法：

应该是库文件不支持armv7s，修改Architectures中，除去armv7s