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I want to install two OpenCV versions on my Ubuntu machine. I need the older version for OpenBR and, for development i want to work on the latest version which is OpenCV-3.1.0.
I tried making two build folders but ended up with no useful installation. I m using Ubuntu 16.04 system. and I use OpenCV with python.

I have installed OpenCV-3.1.0 in Ubuntu 16.04 from this link

Sundeep joshi
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    use virtual environment. Create as many virtual environment as you want. Configuration of one environment won't impact other – Moinuddin Quadri Nov 21 '16 at 21:53
  • Possible duplicate of [Installing multiple versions of a package with pip](http://stackoverflow.com/questions/6570635/installing-multiple-versions-of-a-package-with-pip) – Moinuddin Quadri Nov 21 '16 at 21:54
  • Yes. i am installing using virtual environment only. The thing is, that one installation works fine. but as soon as i configure the other, both are messed up. I'll try once again though, fresh installation. But i will use openbr and opencv 3.1 together, so i want in one environment only. – Sundeep joshi Nov 21 '16 at 21:55
  • Why do you need both installation within single virtual environment. Shouldn't you be doing that in different environment? – Moinuddin Quadri Nov 21 '16 at 21:57
  • I want to use openbr and opencv 3.1 together. and openbr uses opencv 2.7.. – Sundeep joshi Nov 21 '16 at 21:59

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