diff --git a/projects/webrtc/build b/projects/webrtc/build
index bd42a73..5151c75 100644
--- a/projects/webrtc/build
+++ b/projects/webrtc/build
@@ -2,6 +2,18 @@
 set -e
 [% c("var/set_default_env") -%]
 [% c("var/setarch") -%]
+[% IF c("var/windows") -%]
+  # This gcc is used only to compile the bootstrap gn.
+  mkdir -p /var/tmp/dist
+  tar -C /var/tmp/dist -xf $rootdir/[% c('input_files_by_name/gcc') %]
+  hgccdir=/var/tmp/dist/gcc
+  export PATH=$hgccdir/bin:$PATH
+  [% IF c("var/windows-i686") -%]
+  export LD_LIBRARY_PATH=$hgccdir/lib
+  [% ELSE -%]
+  export LD_LIBRARY_PATH=$hgccdir/lib64
+  [% END -%]
+[% END -%]
 distdir=/var/tmp/dist/[% project %]
 [% pc(c('var/compiler'), 'var/setup', { compiler_tarfile => c('input_files_by_name/' _ c('var/compiler')) }) %]
 
@@ -40,8 +52,11 @@ cd $builddir
 [% IF c("var/osx") -%]
   patch -p1 < $rootdir/webrtc-mac.patch
 [% END -%]
+[% IF c("var/windows") -%]
+  patch -p1 < $rootdir/webrtc-windows.patch
+[% END -%]
 
-[% IF c("var/linux") -%]
+[% IF c("var/linux") || c("var/windows") -%]
   # First, build a copy of GN, rather than use the prebuilt copy in buildtools/linux64.
   cd tools/gn
   # __STDC_FORMAT_MACROS is needed for a definition of PRIxPTR from inttypes.h.
@@ -75,7 +90,31 @@ print("xcode_build=\"7.3\"")
 print("xcode_version=\"0730\"")
 EOF
 [% END -%]
+[% IF c("var/windows") -%]
+  win_sdk_version=[% pc('win_sdk', 'version') %]
+  vs_files=third_party/depot_tools/win_toolchain/vs_files
+  mkdir -p $vs_files
+  # Extract the Windows SDK into a case-insensitive ciopfs mount, where
+  # build/vs_toolchain.py expects to find it.
+  tar -C /var/tmp/dist -xf $rootdir/[% c('input_files_by_name/ciopfs') %]
+  mkdir -p $vs_files.ciopfs
+  /var/tmp/dist/ciopfs/bin/ciopfs -o use_ino $vs_files.ciopfs $vs_files
+  mkdir -p $vs_files/$win_sdk_version
+  unzip -q -d $vs_files/$win_sdk_version $rootdir/[% c('input_files_by_name/win_sdk') %]
 
+  # Override the desired Windows SDK hash with the one we have.
+  sed -i -e '/^def _GetDesiredVsToolchainHashes/,/^\($\|[^ ]\)/ {s/return \[.*/return ["'$win_sdk_version'"]/}' build/vs_toolchain.py
+
+  # This command generates the build/win_toolchain.json file.
+  build/vs_toolchain.py update --force
+
+  # For some reason, the necessary INCLUDE environment variable, which defines
+  # the header search path, isn't set automatically. Construct one out of the
+  # contents of SetEnv.{x86,x64}.json. Compare to
+  # https://github.com/nico/hack/blob/3add7d1a010ac8e2bbc431c9953ecfa243cb975d/res/distrib.py#L48-L53
+  # I didn't find it necessary to set LIB.
+  export INCLUDE="$(jq -r '["'$(realpath $vs_files/$win_sdk_version/win_sdk/bin)'/" + (.env.INCLUDE[]|join("/"))]|join(";")' $vs_files/$win_sdk_version/win_sdk/bin/SetEnv.[% IF c("var/linux-i686") %]x86[% ELSE %]x64[% END %].json)"
+[% END -%]
 
 [% IF c("var/linux") -%]
   export CC=gcc
@@ -131,9 +170,18 @@ GN_ARGS+=" use_custom_libcxx=false use_custom_libcxx_for_host=false"
   rm -rf third_party/llvm-build
   rm -rf third_party/binutils
 [% END -%]
+[% IF c("var/windows") -%]
+  # Note, starting GN_ARGS over empty.
+  GN_ARGS=""
+  GN_ARGS+=" target_os=\"win\" target_cpu=\"[% IF c("var/windows-i686") %]x86[% ELSE %]x64[% END %]\""
+[% END -%]
 rm -rf out/Release
 "$GN" gen out/Release --args="$GN_ARGS"
 ninja -C out/Release webrtc field_trial metrics_default pc_test_utils
+[% IF c("var/linux") -%]
+"$AR" crs libwebrtc-magic.a $(find out/Release/obj -name '*.o' | sort)
+[% END -%]
+[% IF c("var/osx") -%]
 # The cctools ar doesn't have the 'D' deterministic option of GNU ar, but the
 # ZERO_AR_DATE environment variable similarly sets timestamps within the
 # archive to zero.
@@ -144,7 +192,11 @@ ninja -C out/Release webrtc field_trial metrics_default pc_test_utils
 # like that, not necessarily of the target architecture, and anyway are not
 # needed.
 # https://bugs.torproject.org/22832
-[% IF c("var/osx") %]ZERO_AR_DATE=1 [% END %]"$AR" crs libwebrtc-magic.a $(find out/Release/obj -name '*.o' | sort)
+ZERO_AR_DATE=1 "$AR" crs libwebrtc-magic.a $(find out/Release/obj -name '*.o' | sort)
+[% END -%]
+[% IF c("var/windows") -%]
+cp out/Release/obj/webrtc.lib libwebrtc-magic.a
+[% END -%]
 
 mkdir -p $distdir
 cd $distdir
@@ -152,11 +204,13 @@ mkdir -p include lib
 cp -f $builddir/libwebrtc-magic.a [% c("var/webrtc/lib_path") %]
 INCLUDE_DIR="$PWD/include"
 cd $builddir
-for h in $(find . -type f -name '*.h');
+(IFS= # Disable word splitting by read.
+find . -type f -name '*.h' -print0 | while read -r -d "" h
 do
   mkdir -p "$INCLUDE_DIR/$(dirname $h)"
   cp -f "$h" "$INCLUDE_DIR/$h"
 done
+)
 
 cd /var/tmp/dist
 [% c('tar', {
diff --git a/projects/webrtc/config b/projects/webrtc/config
index af337e2..5f0fc4d 100644
--- a/projects/webrtc/config
+++ b/projects/webrtc/config
@@ -18,10 +18,22 @@ input_files:
   - project: binutils
     name: binutils
     enable: '[% c("var/linux") %]'
+  # windows needs a recent gcc only to compile the bootstrap gn.
+  - project: gcc
+    name: gcc
+    enable: '[% c("var/windows") %]'
+  - project: win_sdk
+    name: win_sdk
+    enable: '[% c("var/windows") %]'
+  - project: ciopfs
+    name: ciopfs
+    enable: '[% c("var/windows") %]'
   - filename: webrtc-linux.patch
     enable: '[% c("var/linux") %]'
   - filename: webrtc-mac.patch
     enable: '[% c("var/osx") %]'
+  - filename: webrtc-windows.patch
+    enable: '[% c("var/windows") %]'
 
 targets:
   linux:
@@ -54,6 +66,22 @@ targets:
         - libgtk2.0-dev
         - pkg-config
         - python-biplist
+  windows:
+    var:
+      arch_deps:
+        - pkg-config
+        - libattr1
+        - libfuse2
+        - libglib2.0-0
+        - jq
+  windows-i686:
+    var:
+      webrtc:
+        lib_path: lib/libwebrtc-windows-386-magic.lib
+  windows-x86_64:
+    var:
+      webrtc:
+        lib_path: lib/libwebrtc-windows-amd64-magic.lib
 
 steps:
   fetch_sources:
diff --git a/projects/webrtc/webrtc-windows.patch b/projects/webrtc/webrtc-windows.patch
new file mode 100644
index 0000000..0136194
--- /dev/null
+++ b/projects/webrtc/webrtc-windows.patch
@@ -0,0 +1,194 @@
+From 796d7655435fc9038017d2946c0331508ddf0071 Mon Sep 17 00:00:00 2001
+From: David Fifield <david@bamsoftware.com>
+Date: Wed, 28 Mar 2018 13:20:44 -0700
+Subject: [PATCH 1/3] Comment out _CopyDebugger and _CopyRuntime in
+ build/vs_toolchain.py.
+
+This function looks for a file dbghelp.dll that is not present in the
+SDK installed by Visual Studio Community:
+Exception: dbghelp.dll not found in ".../win_sdk/Debuggers/x64/dbghelp.dll"
+You must install the "Debugging Tools for Windows" feature from the Windows 10 SDK.
+
+The Visual Studio installer doesn't have a "Debugging Tools for Windows"
+option. The standalone SDK installer from
+https://developer.microsoft.com/en-us/windows/downloads/sdk-archive
+does; however just commenting out this call seems to make it
+unnecessary.
+---
+ vs_toolchain.py | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/build/vs_toolchain.py b/build/vs_toolchain.py
+index 7a258ed1d..b8e031a03 100755
+--- a/build/vs_toolchain.py
++++ b/build/vs_toolchain.py
+@@ -305,15 +305,15 @@ def CopyDlls(target_dir, configuration, target_cpu):
+   if not vs_runtime_dll_dirs:
+     return
+ 
+-  x64_runtime, x86_runtime = vs_runtime_dll_dirs
+-  runtime_dir = x64_runtime if target_cpu == 'x64' else x86_runtime
+-  _CopyRuntime(target_dir, runtime_dir, target_cpu, debug=False)
+-  if configuration == 'Debug':
+-    _CopyRuntime(target_dir, runtime_dir, target_cpu, debug=True)
+-  else:
+-    _CopyPGORuntime(target_dir, target_cpu)
+-
+-  _CopyDebugger(target_dir, target_cpu)
++  # x64_runtime, x86_runtime = vs_runtime_dll_dirs
++  # runtime_dir = x64_runtime if target_cpu == 'x64' else x86_runtime
++  # _CopyRuntime(target_dir, runtime_dir, target_cpu, debug=False)
++  # if configuration == 'Debug':
++  #   _CopyRuntime(target_dir, runtime_dir, target_cpu, debug=True)
++  # else:
++  #   _CopyPGORuntime(target_dir, target_cpu)
++
++  # _CopyDebugger(target_dir, target_cpu)
+ 
+ 
+ def _CopyDebugger(target_dir, target_cpu):
+-- 
+2.11.0
+
+
+From 0462bedf5126537bfc6d246c630c158b617810d7 Mon Sep 17 00:00:00 2001
+From: David Fifield <david@bamsoftware.com>
+Date: Wed, 28 Mar 2018 18:48:27 -0700
+Subject: [PATCH 2/3] Set vc_bin_dir to a dummy value.
+
+This doesn't seem to be needed (it would contain e.g. cl.exe, which we
+don't use), but it needs to be set to appease the build scripts.
+---
+ toolchain/win/setup_toolchain.py | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/build/toolchain/win/setup_toolchain.py b/build/toolchain/win/setup_toolchain.py
+index a1d2ea4b2..c98f013ff 100644
+--- a/build/toolchain/win/setup_toolchain.py
++++ b/build/toolchain/win/setup_toolchain.py
+@@ -209,6 +209,7 @@ def main():
+     with open('environment.winrt_' + cpu, 'wb') as f:
+       f.write(env_block)
+ 
++  vc_bin_dir = "NONEXISTENT_VC_BIN_DIR"
+   assert vc_bin_dir
+   print 'vc_bin_dir = ' + gn_helpers.ToGNString(vc_bin_dir)
+   assert include_I
+-- 
+2.11.0
+
+From fe050ea847d1797adfe64ab702c2aae6bb37bae9 Mon Sep 17 00:00:00 2001
+From: David Fifield <david@bamsoftware.com>
+Date: Wed, 28 Mar 2018 20:49:21 -0700
+Subject: [PATCH 3/3] Disable the video_capture module.
+
+It depends on winsdk_samples code, which requires some SDK files that we
+don't have. E.g.,
+
+In file included from ../../third_party/winsdk_samples/Samples/multimedia/directshow/baseclasses/amextra.cpp:10:
+In file included from ../../third_party/winsdk_samples/Samples/multimedia/directshow/baseclasses/streams.h:185:
+../../third_party/winsdk_samples/Samples/multimedia/directshow/baseclasses/refclock.h(83,37):  error: unknown type name 'CAMSchedule'
+                        __inout_opt CAMSchedule * pSched = 0 );
+                                    ^
+---
+ BUILD.gn              | 8 ++++----
+ common_video/BUILD.gn | 2 +-
+ media/BUILD.gn        | 6 +++---
+ modules/BUILD.gn      | 2 +-
+ 4 files changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/BUILD.gn b/BUILD.gn
+index e59064452..bcbfd5107 100644
+--- a/BUILD.gn
++++ b/BUILD.gn
+@@ -277,7 +277,7 @@ if (!build_with_chromium) {
+       "logging",
+       "media",
+       "modules",
+-      "modules/video_capture:video_capture_internal_impl",
++      # "modules/video_capture:video_capture_internal_impl",
+       "ortc",
+       "p2p",
+       "pc",
+@@ -318,7 +318,7 @@ if (!build_with_chromium) {
+         "modules/audio_processing:audio_processing_tests",
+         "modules/remote_bitrate_estimator:bwe_simulations_tests",
+         "modules/rtp_rtcp:test_packet_masks_metrics",
+-        "modules/video_capture:video_capture_internal_impl",
++        # "modules/video_capture:video_capture_internal_impl",
+         "ortc:ortc_unittests",
+         "pc:peerconnection_unittests",
+         "pc:rtc_pc_unittests",
+@@ -336,7 +336,7 @@ if (!build_with_chromium) {
+           "sdk/android:libjingle_peerconnection_android_unittest",
+         ]
+       } else {
+-        deps += [ "modules/video_capture:video_capture_tests" ]
++        # deps += [ "modules/video_capture:video_capture_tests" ]
+       }
+       if (rtc_enable_protobuf) {
+         deps += [
+@@ -450,7 +450,7 @@ if (rtc_include_tests) {
+       # TODO(eladalon): call_tests aren't actually video-specific, so we
+       # should move them to a more appropriate test suite.
+       "call:call_tests",
+-      "modules/video_capture",
++      # "modules/video_capture",
+       "rtc_base:rtc_base_tests_utils",
+       "test:test_common",
+       "test:test_main",
+diff --git a/common_video/BUILD.gn b/common_video/BUILD.gn
+index 669fa7a54..1dcc7ce85 100644
+--- a/common_video/BUILD.gn
++++ b/common_video/BUILD.gn
+@@ -117,7 +117,7 @@ if (rtc_include_tests) {
+     deps = [
+       ":common_video",
+       "../api:video_frame_api_i420",
+-      "../modules/video_capture:video_capture",
++      # "../modules/video_capture:video_capture",
+       "../rtc_base:rtc_base",
+       "../rtc_base:rtc_base_approved",
+       "../system_wrappers:system_wrappers",
+diff --git a/media/BUILD.gn b/media/BUILD.gn
+index f59cbb63e..613bc5d71 100644
+--- a/media/BUILD.gn
++++ b/media/BUILD.gn
+@@ -227,10 +227,10 @@ rtc_static_library("rtc_audio_video") {
+ 
+   public_configs = []
+   if (build_with_chromium) {
+-    deps += [ "../modules/video_capture:video_capture" ]
++    # deps += [ "../modules/video_capture:video_capture" ]
+   } else {
+     public_configs += [ ":rtc_media_defines_config" ]
+-    deps += [ "../modules/video_capture:video_capture_internal_impl" ]
++    # deps += [ "../modules/video_capture:video_capture_internal_impl" ]
+   }
+   if (rtc_enable_protobuf) {
+     deps += [ "../modules/audio_processing/aec_dump:aec_dump_impl" ]
+@@ -255,7 +255,7 @@ rtc_static_library("rtc_audio_video") {
+     "../modules/audio_mixer:audio_mixer_impl",
+     "../modules/audio_processing:audio_processing",
+     "../modules/audio_processing/aec_dump",
+-    "../modules/video_capture:video_capture_module",
++    # "../modules/video_capture:video_capture_module",
+     "../modules/video_coding",
+     "../modules/video_coding:webrtc_h264",
+     "../modules/video_coding:webrtc_vp8",
+diff --git a/modules/BUILD.gn b/modules/BUILD.gn
+index 465f32d3c..4918bc8b8 100644
+--- a/modules/BUILD.gn
++++ b/modules/BUILD.gn
+@@ -255,7 +255,7 @@ if (rtc_include_tests) {
+       "remote_bitrate_estimator:remote_bitrate_estimator_unittests",
+       "rtp_rtcp:rtp_rtcp_unittests",
+       "utility:utility_unittests",
+-      "video_capture",
++      # "video_capture",
+       "video_coding:video_coding_unittests",
+       "video_processing:video_processing_unittests",
+     ]
+-- 
+2.11.0
+