Customized manylinux images for opencv-python

This folder includes Dockerfiles for extending both i686 and x86_64 manylinux images.

The extended images were created to be able to build OpenCV in reasonable time with Travis.

These images have been built locally because the process takes over 1,5 hours with modern i7 processor. The images are hosted at https://quay.io/user/skvark.

The images have following extra software installed:

Qt 4.8.7
Cmake 3.9.0
FFmpeg with libvpx (latest snapshots at the build time)
libjpeg-turbo 1.5.3
Some missing headers included from more recent Linux to be able to enable V4L / V4L2 support in OpenCV