Today I found out that x265 is already present in ffmpeg so I compiled ffmpeg with this guide

Sadly libx265 did not work on ubuntu, however on windows I tried the same thing with zeranoe ffmpeg build and it worked without a problem.

So do you think i did something wrong or it is not yet implemented in linux build (using that guide)? The results of the command ffmpeg -codecs | grep -i hevc show:

  ffmpeg version 2.1.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Feb 19 2014 19:00:17 with gcc 4.8 (Ubuntu/Linaro 4.8.1-10ubuntu9)
  configuration: --prefix=/home/levan/ffmpeg_build --extra-cflags=-I/home/levan/ffmpeg_build/include --extra-ldflags=-L/home/levan/ffmpeg_build/lib --bindir=/home/levan/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
  libavutil      52. 64.100 / 52. 64.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 33.100 / 55. 33.100
  libavdevice    55. 10.100 / 55. 10.100
  libavfilter     4.  1.102 /  4.  1.102
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
 D.V.L. hevc                 H.265 / HEVC (High Efficiency Video Coding)

Thank you for your time