Windows nightly wheels build failed

Error text:

  C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.11.25503\bin\HostX64\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MT -ID:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder -ID:\_work\1\s\packaging\windows\conda\envs\py35\Library\include -ID:\_work\1\s\packaging\windows\vision\torchvision\csrc -ID:\_work\1\s\packaging\windows\conda\envs\py35\lib\site-packages\torch\include -ID:\_work\1\s\packaging\windows\conda\envs\py35\lib\site-packages\torch\include\torch\csrc\api\include -ID:\_work\1\s\packaging\windows\conda\envs\py35\lib\site-packages\torch\include\TH -ID:\_work\1\s\packaging\windows\conda\envs\py35\lib\site-packages\torch\include\THC -ID:\_work\1\s\packaging\windows\conda\envs\py35\include -ID:\_work\1\s\packaging\windows\conda\envs\py35\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.11.25503\ATLMFC\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.11.25503\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\shared" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\um" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\winrt" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\cppwinrt" -ID:\_work\1\s\packaging\windows\conda\envs\py35\Library\include /EHsc /TpD:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\audio_sampler.cpp /Fobuild\temp.win-amd64-3.5\Release\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\audio_sampler.obj /MD /wd4819 /EHsc -std=c++14 -DTORCH_API_INCLUDE_EXTENSION_H -DTORCH_EXTENSION_NAME=base_decoder -D_GLIBCXX_USE_CXX11_ABI=0
  cl : Command line warning D9025 : overriding '/MT' with '/MD'
  cl : Command line warning D9002 : ignoring unknown option '-std=c++14'
  audio_sampler.cpp
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(30): error C3646: 'format': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(30): error C2059: syntax error: '{'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(30): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(25): error C2039: 'format': is not a member of 'ffmpeg::AudioFormat'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(21): note: see declaration of 'ffmpeg::AudioFormat'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(25): error C2065: 'format': undeclared identifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(45): error C3646: 'format': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(45): error C2059: syntax error: '{'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(45): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(40): error C2039: 'format': is not a member of 'ffmpeg::VideoFormat'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(36): note: see declaration of 'ffmpeg::VideoFormat'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(53): error C3646: 'type': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(53): error C2059: syntax error: '{'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(53): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(97): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(99): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(101): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(103): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(106): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(112): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(118): error C2061: syntax error: identifier 'ssize_t'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(129): error C3646: 'stream': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(129): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(135): error C3646: 'num': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(135): error C2059: syntax error: '{'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(135): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(137): error C3646: 'den': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(137): error C2059: syntax error: '{'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(137): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(139): error C3646: 'duration': unknown override specifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(139): error C2059: syntax error: '{'
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(139): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(98): error C2065: 's': undeclared identifier
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(97): error C2614: 'ffmpeg::MediaFormat': illegal member initialization: 'stream' is not a base or member
  d:\_work\1\s\packaging\windows\vision\torchvision\csrc\cpu\decoder\defs.h(97): fatal error C1903: unable to recover from previous error(s); stopping compilation
  Internal Compiler Error in C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.11.25503\bin\HostX64\x64\cl.exe.  You will be prompted to send an error report to Microsoft later.
  INTERNAL COMPILER ERROR in 'C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.11.25503\bin\HostX64\x64\cl.exe'
      Please choose the Technical Support command on the Visual C++
      Help menu, or open the Technical Support help file for more information
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\BuildTools\\VC\\Tools\\MSVC\\14.11.25503\\bin\\HostX64\\x64\\cl.exe' failed with exit status 2
  
  ----------------------------------------
  Running setup.py clean for torchvision
Failed to build torchvision
ERROR: Failed to build one or more wheels
You are using pip version 10.0.1, however version 20.0.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

Start by reproducing the Windows nightly wheel failure and inspect packaging/windows/vision/torchvision/csrc/cpu/decoder/defs.h, especially the declarations reported by the compiler. Review the build command and the surrounding wheel-building configuration; done means the Windows nightly torchvision wheel builds successfully without the reported compiler errors.