Closed GoogleCodeExporter closed 8 years ago
If you want to use the MinGW libs, you will need to compile JavaCV from source
using JavaCPP (e.g.: ant -Djavacpp.options="-properties mingw-x86" ) but I have
not tested it and you may need to adjust a few properties (check inside the
mingw-x86.properties file of JavaCPP)
Original comment by samuel.a...@gmail.com
on 29 Jul 2011 at 4:20
Thanks Sam! but where can I get the source code of javac-windows-x86.jar which
contains a number of DLL to access opencv-*.dll. I think I might understand the
problem better by looking at the source code.
Original comment by vin...@gmail.com
on 29 Jul 2011 at 5:13
It's generated at build time by JavaCPP...
Original comment by samuel.a...@gmail.com
on 29 Jul 2011 at 5:16
Hi Sam,
I found only jniopencv_core.cpp in javacpp built folder. how can I generate
those DLL from it? Thanks
Original comment by vin...@gmail.com
on 29 Jul 2011 at 5:23
Just run the Ant command I gave you.. If it does not compile, then check the
error message
Original comment by samuel.a...@gmail.com
on 29 Jul 2011 at 6:39
Hi Sam,
I tried to compile following your instruction and found that g++ cannot get
through jniopencv_core.cpp. It throws many "undefined reference to ..." errors
(by ld). I guessed some lib is missing. Please give me some instructions.
Thanks a lot.
Vic
Original comment by vin...@gmail.com
on 29 Jul 2011 at 7:13
Hi Sam,
I've been trying to play with mingw-x86.properies by changing
compiler.link.prefix=-llib
compiler.link.suffix=.dll.a
without success. ld.exe says it cannot find -llibopencv_core230.dll.a, which is
the required lib file.
Any suggestion?
Thanks a lot!
Original comment by vin...@gmail.com
on 29 Jul 2011 at 7:56
AFAIK, gcc can link directly with the DLL files. Read the MinGW documentation
about it
Original comment by samuel.a...@gmail.com
on 30 Jul 2011 at 1:45
Hi Sam,
I managed to compile through standard opencv stuff but then got stuck at the
3rd party libraries. Some of them recommed to use gcc instead of g++ e.g.
ffmpeg. Can you please give me some suggestion? Thanks!
Original comment by vin...@gmail.com
on 30 Jul 2011 at 11:33
[deleted comment]
Info on how to build FFmpeg with MinGW is availabe on this site
http://ffmpeg.zeranoe.com/ so I'm not sure what else you want to know? JavaCV
will link against FFmpeg 0.7.x just fine with g++, as long as compiled binaries
are there.
Original comment by samuel.a...@gmail.com
on 9 May 2012 at 1:18
Original issue reported on code.google.com by
vin...@gmail.com
on 29 Jul 2011 at 3:34