[FFmpeg-user] I can't find any video devices on the Windows 7 source system

[John Lewis]

I would like to stream a desktop from one computer running Windows 7 to
another to  on a LAN running Debian 8 to show an application that is on
the screen from the first computer through to the second computer that
is connected to a projector. The application can't easily run on the
Debian system connected to the projector because the software wasn't
built for the operating system.

I can't find any video devices on the Windows source system. I have
command output attached.
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PS C:\Program Files> ffmpeg\bin\ffmpeg.exe -list_devices true -f dshow -i dummy
ffmpeg version N-80101-gd970f7b Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.3.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-nvenc --enable-avisynth --enable-bzlib --e
nable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --en
able-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmfx -
-enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtw
olame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libweb
p --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink -
-enable-zlib
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 43.100 / 57. 43.100
  libavformat    57. 37.100 / 57. 37.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.100 /  6. 46.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
[dshow @ 02f07600] DirectShow video devices (some may be both video and audio devices)
[dshow @ 02f07600] Could not enumerate video devices (or none found).
[dshow @ 02f07600] DirectShow audio devices
[dshow @ 02f07600]  "Mic (Envy24 Family Audio Contro"
[dshow @ 02f07600]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Mic (Envy24 Family Audio Cont
ro"
[dshow @ 02f07600]  "Line In (Envy24 Family Audio Co"
[dshow @ 02f07600]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line In (Envy24 Family Audio
Co"
dummy: Immediate exit requested
PS C:\Program Files>