1. 参文“在Windows下编译Cef3.2623并加入mp3、mp4支持（附带源码包和最终DLL）”下载包
http://blog.csdn.net/zhuhongshu/article/details/54193842

2. 创建build.bat
e:\cef\
source
automate-git.py
build.bat

如下：

set CEF_USE_GN=0
set DEPOT_TOOLS_WIN_TOOLCHAIN=0
set GYP_DEFINES=component=shared_library
set GYP_GENERATORS=msvs-ninja,ninja
set GYP_MSVS_VERSION=2013
set GYP_MSVS_OVERRIDE_PATH=c:\Program Files (x86)\Microsoft Visual Studio 12.0

python automate-git.py --download-dir=e:\cef\source --branch=2623 --no-update --no-debug-build --build-log-file --verbose-build --force-distrib --force-build

3. 构建
cd e:\cef
./build.bat

4. 报错
Generating CEF project files...

________ running 'e:\cef\source\depot_tools\python276_bin\python.exe ../build/gyp_chromium cef.gyp -I cef.gypi' in 'e:\cef\source\chromium\src\cef'
Enabled Psyco JIT.
Updating projects from gyp files...
Traceback (most recent call last):
File "../build/gyp_chromium", line 12, in
execfile(__file__ + '.py')
File "../build/gyp_chromium.py", line 336, in
sys.exit(main())
File "../build/gyp_chromium.py", line 323, in main
gyp_rc = gyp.main(args)
File "e:\cef\source\chromium\src\tools\gyp\pylib\gyp\__init__.py", line 538, in main
return gyp_main(args)
File "e:\cef\source\chromium\src\tools\gyp\pylib\gyp\__init__.py", line 523, in gyp_main
generator.GenerateOutput(flat_list, targets, data, params)
File "e:\cef\source\chromium\src\tools\gyp\pylib\gyp\generator\ninja.py", line 2421, in GenerateOutput
pool.map(CallGenerateOutputForConfig, arglists)
File "e:\cef\source\depot_tools\python276_bin\lib\multiprocessing\pool.py", line 250, in map
return self.map_async(func, iterable, chunksize).get()
File "e:\cef\source\depot_tools\python276_bin\lib\multiprocessing\pool.py", line 554, in get
raise self._value
Exception: "['C:\\Program Files (x86)\\Windows Kits\\8.1\\Bin\\SetEnv.Cmd', '/x86', '&&', 'set']" failed with error 1
Traceback (most recent call last):
File "tools\gclient_hook.py", line 106, in
RunAction(cef_dir, gyper)
File "e:\cef\source\chromium\src\cef\tools\gclient_util.py", line 39, in RunAction
command, cwd=dir, always=True)
File "e:\cef\source\depot_tools\gclient_utils.py", line 292, in CheckCallAndFilterAndHeader
return CheckCallAndFilter(args, **kwargs)
File "e:\cef\source\depot_tools\gclient_utils.py", line 538, in CheckCallAndFilter
rv, args, kwargs.get('cwd', None), None, None)
subprocess2.CalledProcessError: Command 'e:\\cef\\source\\depot_tools\\python276_bin\\python.exe ../build/gyp_chromium cef.gyp -I cef.gypi' returned non-zero exit status 1 in e:\ce
f\source\chromium\src\cef
Traceback (most recent call last):
File "automate-git.py", line 942, in
run(path, cef_src_dir, depot_tools_dir)
File "automate-git.py", line 55, in run
shell=(sys.platform == 'win32'))
File "e:\cef\source\depot_tools\python276_bin\lib\subprocess.py", line 540, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['e:\\cef\\source\\chromium\\src\\cef\\cef_create_projects.bat']' returned non-zero exit status 1

原因：可能是从 "VS2013 开发人员命令”进入引起
解法：
type cmd.exe to start a DOS prompt