Reason: image not found

[wanghaisheng]

➜  age_gender git:(master) th demo.lua camera
/Users/wanghaisheng/torch/install/bin/luajit: .../wanghaisheng/torch/install/share/lua/5.1/trepl/init.lua:389: /Users/wanghaisheng/torch/install/share/lua/5.1/cv/init.lua:295: dlopen(/Users/wanghaisheng/torch/install/share/lua/5.1/cv/lib/libCommon.dylib, 5): Library not loaded: /usr/local/opt/ffmpeg/lib/libavcodec.56.dylib
  Referenced from: /usr/local/opt/opencv3/lib/libopencv_highgui.3.1.dylib
  Reason: image not found
stack traceback:
	[C]: in function 'error'
	.../wanghaisheng/torch/install/share/lua/5.1/trepl/init.lua:389: in function 'require'
	demo.lua:1: in main chunk
	[C]: in function 'dofile'
	...heng/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
	[C]: at 0x01005481a0

[shrubb]

Do you really have /usr/local/opt/ffmpeg/lib/libavcodec*.dylib? If yes, this link suggests reinstalling ffmpeg then opencv. If it doesn't work, try DYLD_FALLBACK_LIBRARY_PATH trick as shown here.