C:\work\pupil\pupil_src>python main.py player
player - [INFO] video_capture: Install pyrealsense to use the Intel RealSense backend
No module named 'pyrealsense2'
player - [INFO] video_capture: Install pyrealsense2 to use the Intel RealSense backend for D400 series cameras
player - [INFO] launchables.player: Session setting are from a  different version of this app. I will not use those.
player - [INFO] launchables.player: Starting new session with 'C:\Users\Jolka\recordings\2019_03_25\002'

player - [INFO] update_methods: Updating meta info
player - [INFO] update_methods: Checking for world-less recording
player - [INFO] video_capture: Install pyrealsense to use the Intel RealSense backend
No module named 'pyrealsense2'
player - [INFO] video_capture: Install pyrealsense2 to use the Intel RealSense backend for D400 series cameras
player - [INFO] calibration_routines.optimization_calibration.build: Building extension modules...
cl : Command line warning D9025 : overriding '/W3' with '/w'
cl : Command line warning D9002 : ignoring unknown option '-std=c++11'
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64\\link.exe' failed with exit status 1257
player - [ERROR] launchables.player: Process Player crashed with trace:
Traceback (most recent call last):
  File "C:\work\pupil\pupil_src\launchables\player.py", line 91, in player
    from plugin_manager import Plugin_Manager
  File "C:\work\pupil\pupil_src\shared_modules\plugin_manager.py", line 14, in <module>
    from calibration_routines import Calibration_Plugin, Gaze_Mapping_Plugin
  File "C:\work\pupil\pupil_src\shared_modules\calibration_routines\__init__.py", line 13, in <module>
    from .screen_marker_calibration import Screen_Marker_Calibration
  File "C:\work\pupil\pupil_src\shared_modules\calibration_routines\screen_marker_calibration.py", line 28, in <module>
    from .finish_calibration import finish_calibration
  File "C:\work\pupil\pupil_src\shared_modules\calibration_routines\finish_calibration.py", line 19, in <module>
    from .optimization_calibration import bundle_adjust_calibration
  File "C:\work\pupil\pupil_src\shared_modules\calibration_routines\optimization_calibration\__init__.py", line 19, in <module>
    build_cpp_extension()
  File "C:\work\pupil\pupil_src\shared_modules\calibration_routine