Itseez/opencv — pull request #3261 by a-wi (2014-09-23 20:09:17+00:00)
Title: Fixed CMake issue with FFMPEG highgui configuration

Currently, FFMPEG source files are included in highgui project file regardless of CMake WITH_FFMPEG option.
After applying this PR FFMPEG files are included only if WITH_FFMPEG option is enabled.