D:\Multimedia\ffmpeg\git-master>ffmpeg -i "Z:\1.mkv" 2.mkv
ffprobe version N-75662-gaea5db9 Copyright (c) 2007-2015 the FFmpeg developers
  built with gcc 5.2.0 (GCC)
  configuration: --enable-nonfree --enable-nvenc --extra-cflags=-I/d/Multimedia/BuildEnv/enc/include/
  libavutil      55.  2.100 / 55.  2.100
  libavcodec     57.  3.100 / 57.  3.100
  libavformat    57.  2.101 / 57.  2.101
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6.  9.100 /  6.  9.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.100 /  2.  0.100
Argument '2.mkv' provided as input filename, but 'Z:\1.mkv' was already specified.