I have a question regarding the libmv library. I have seen that there is an offical github repository for libmv but last time it has been updated was back in 2014. The library in the blender source code seems to have recent bugfixes but it is not a submodule. My question is if I can use the blender version of libmv or is it recommended to use the unmaintained project? Is libmv an offical blender project?