using ffmpeg with xcode

Question

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problem compiling ffmpeg for iFrameExtractor

I have successfully run FFMPEG in the terminal on a Mac, but I have problem with Xcode. I used iFrameExtractor but I found these errors:

ld: warning: ignoring file /Users/training/Desktop/iFrameExtractor/ffmpeg/lib/libavformat.a, file was built for archive which is not the architecture being linked (i386)
ld: warning: ignoring file /Users/training/Desktop/iFrameExtractor/ffmpeg/lib/libavcodec.a, file was built for archive which is not the architecture being linked (i386)
ld: warning: ignoring file /Users/training/Desktop/iFrameExtractor/ffmpeg/lib/libavdevice.a, file was built for archive which is not the architecture being linked (i386)
ld: warning: ignoring file /Users/training/Desktop/iFrameExtractor/ffmpeg/lib/libavutil.a, file was built for archive which is not the architecture being linked (i386)
ld: warning: ignoring file /Users/training/Desktop/iFrameExtractor/ffmpeg/lib/libswscale.a, file was built for archive which is not the architecture being linked (i386)
Undefined symbols for architecture i386:
  "_av_register_all", referenced from:
      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o
  "_av_open_input_file", referenced from:
      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o
  "_av_find_stream_info", referenced from:
      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o
  "_avcodec_find_decoder", referenced from:
      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o
  "_avcodec_open", referenced from:
      -[VideoFrameExtractor initWithVideo:] in VideoFrameExtractor.o
  "_avcodec_alloc_frame", referenced from:
      -[VideoFrameExtractor initWithVideo:] 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
  "_avpicture_alloc", referenced from:
      -[VideoFrameExtractor setupScaler] in VideoFrameExtractor.o
  "_sws_getContext", referenced from:
      -[VideoFrameExtractor setupScaler] in VideoFrameExtractor.o
  "_avformat_seek_file", referenced from:
      -[VideoFrameExtractor seekTime:] in VideoFrameExtractor.o
  "_avcodec_flush_buffers", referenced from:
      -[VideoFrameExtractor seekTime:] in VideoFrameExtractor.o
  "_av_free", referenced from:
      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o
  "_avcodec_close", referenced from:
      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o
  "_av_close_input_file", referenced from:
      -[VideoFrameExtractor dealloc] in VideoFrameExtractor.o
  "_av_read_frame", referenced from:
      -[VideoFrameExtractor stepFrame] in VideoFrameExtractor.o
  "_avcodec_decode_video2", referenced from:
      -[VideoFrameExtractor stepFrame] in VideoFrameExtractor.o
  "_av_free_packet", referenced from:
      -[VideoFrameExtractor stepFrame] in VideoFrameExtractor.o
  "_sws_scale", referenced from:
      -[VideoFrameExtractor convertFrameToRGB] in VideoFrameExtractor.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

score 2 · Answer 1 · answered Apr 03 '12 at 12:16

2

Since iPhone applications are targeted for the ARM architecture, you'll have to recompile the ffmpeg library for ARM.

You should use the --arch=arm option when configuring the ffmpeg build.

answered Apr 03 '12 at 12:16

Blagovest Buyukliev

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how can i do this please tell me the whole procedure.I am using xcode4.2.1 & mac 10.7.2... – Ada Apr 04 '12 at 05:04

using ffmpeg with xcode

1 Answers1