如何在CEF3最新版本中启用H264支持？

Question

我知道cef3的旧版本如2623可以通过修改chromium\src\cef\cef.gypi文件来启用H264支持.但在3071或3029等最新版本中,cef3删除了cef.gypi文件.我用google搜索了这个,但我发现仍然是通过修改cef.gypi文件.由于此方法仅对旧版本有效.有没有其他方法可以让新版本支持H264？非常感谢!

Answer 1

实际上,支持的编译选项proprietary codecs已被移动.

魔法现在发生在这里:

set GN_DEFINES=is_official_build=true proprietary_codecs=true ffmpeg_branding=Chrome

您应该更新/创建2个批处理文件(如此处所示):

C:\代码\ chromium_git\update.bat:

set CEF_USE_GN=1
set GN_DEFINES=is_official_build=true proprietary_codecs=true ffmpeg_branding=Chrome
set GN_ARGUMENTS=--ide=vs2015 --sln=cef --filters=//cef/*
python ..\automate\automate-git.py --download-dir=C:\code\chromium_git --depot-tools-dir=C:\code\depot_tools --no-distrib --no-build

C:\代码\ chromium_git \铬\ SRC\CEF\create.bat:

set CEF_USE_GN=1
set GN_DEFINES=is_win_fastlink=true proprietary_codecs=true ffmpeg_branding=Chrome
set GN_ARGUMENTS=--ide=vs2015 --sln=cef --filters=//cef/*
call cef_create_projects.bat

有2篇wiki文章解释了如何构建CEF/Chromium:

1. https://bitbucket.org/chromiumembedded/cef/wiki/MasterBuildQuickStart.md
2. 并BranchesAndBuilding在同一个维基

更新: 以下是有关Chromium构建标志的信息的更多链接:

https://www.chromium.org/developers/gn-build-configuration
https://www.chromium.org/audio-video
https://chromium.googlesource.com/chromium/src/+/lkcr/docs/ windows_build_instructions.md

... GYP/GN flags which can alter behaviour of Chromium's HTML5 audio/video implementation.

ffmpeg_branding
  Overrides which version of FFmpeg to use
  Default: $(branding)
  Values:
    Chrome - includes additional proprietary codecs (MP3, etc..) for use with Google Chrome
    Chromium - builds default set of codecs

proprietary_codecs
  Alters the list of codecs Chromium claims to support, which affects <source> and canPlayType() behaviour
  Default: 0(gyp)/false(gn)
  Values:
    0/false - <source> and canPlayType() assume the default set of codecs
    1/true - <source> and canPlayType() assume they support additional proprietary codecs