symbol(s) not found for architecture x86_64

[joaovcarvalho]

Hi I am getting this error when trying to compile the Video Decoder tool for Mac OS X Version 10.11.6:

gcc video_decoder.o mpjpeg.o -shared -L/Users/joaocarvalho/torch/install/lib/lua/5.1 -L/Users/joaocarvalho/torch/install/lib -o libvideo_decoder.so -lavutil -lavformat -lavcodec -lswscale -lTH -lluajit -lluaT /usr/local/lib/libjpeg.dylib /usr/local/lib/libpng.dylib Undefined symbols for architecture x86_64: "_avcodec_alloc_frame", referenced from: _video_decoder_init in video_decoder.o _video_decoder_rgb in video_decoder.o _encoderopen in video_decoder.o "_avcodec_free_frame", referenced from: _encoderclose in video_decoder.o "_avcodec_get_frame_defaults", referenced from: _video_decoder_batch_resized in video_decoder.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *\ [libvideo_decoder.so] Error 1

Any idea how to solve this ?

[mvitez]

make NEWFFMPEG=1

[joaovcarvalho]

Same thing:

gcc video_decoder.o mpjpeg.o -shared -L/Users/joaocarvalho/torch/install/lib/lua/5.1 -L/Users/joaocarvalho/torch/install/lib -o libvideo_decoder.so -lavutil -lavformat -lavcodec -lswscale -lTH -lluajit -lluaT /usr/local/lib/libjpeg.dylib /usr/local/lib/libpng.dylib Undefined symbols for architecture x86_64: "_avcodec_alloc_frame", referenced from: _video_decoder_init in video_decoder.o _video_decoder_rgb in video_decoder.o _encoderopen in video_decoder.o "_avcodec_free_frame", referenced from: _encoderclose in video_decoder.o "_avcodec_get_frame_defaults", referenced from: _video_decoder_batch_resized in video_decoder.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *\ [libvideo_decoder.so] Error 1

[mvitez]

make clean before making again with NEWFFMPEG=1

[joaovcarvalho]

Thanks I forgot that, but now the error changed to:

gcc -O3 -c -fpic -Wall -DDARWIN -DNEWFFMPEG -I. -I/Users/joaocarvalho/torch/install/include -I/usr/include/freetype2 livecam.c livecam.c:9:10: fatal error: 'ft2build.h' file not found

include

     ^

1 error generated. make: *\ [livecam.o] Error 1

[mvitez]

There is a missing dependecy in the docs. I will update them. You need libfreetype6-dev, I don't know about Macs.

[jhjin]

if you use homebrew, try this:

brew install freetype

[joaovcarvalho]

Hey thanks for your responses. I runned the brew installation but looks like I already have freetype installed:

brew install freetype Warning: freetype-2.6.5 already installed

[joaovcarvalho]

Maybe it is only the headers files missing ?

[mvitez]

I forgot that livecam does not work on Mac OSX, as it does not implement OpenGL initialization for OSX. So freetype won't be your major problem. Just remove it from the all: line in the Makefile.

[joaovcarvalho]

That worked just fine and I won't use livecam. Thank you so much.