Linux Qt5.15.2 编译QWebEngine源码支持音视频H264

背景

默认自带的QWebEngine 因版权问题不支持音视频功能，需要自己编译源码以支持。

平台：Linux（UOS V20 1050）
Qt：5.15.2

准备工作

1. 下载 Qt 5.15.2 对应版本源码，使用镜像网站或者Qt Maintenance Tool工具下载。
2. 配置 Qt 环境变量

vim ~/.bashrc

将以下内容追加到bashrc文件后

#QT ENV
export PATH=/home/Leou/Qt/5.15.2/gcc_64/bin:$PATH
export LD_LIBRARY_PATH=/home/Leou/Qt/5.15.2/gcc_64/lib:$LD_LIBRARY_PATH
export QT_PLUGIN_PATH=/home/Leou/Qt/5.15.2/gcc_64/plugins:$QT_PLUGIN_PATH
export QML2_PATH=/home/Leou/Qt/5.15.2/gcc_64/qml:$QML2_PATH

刷新使其生效

source ~/.bashrc

这个阶段可以预先安装所需的库：

On all platforms, the following tools are required at build time:

• Python 2.7.5 or later. Python 3 is not supported.
• Bison, Flex
• GPerf
• Node.js version 8 or later (version 12 or later is recommended)

这些是最基本的要求，实际上还有很多库需要安装，可参考qtwebengine-platform-notes

编译

创建build目录，并使用qmake ../qtwebengine.pro -- -webengine-proprietary-codecs命令

Leou@Leou-PC:/media/Leou/qtwebengine$ mkdir build
Leou@Leou-PC:/media/Leou/qtwebengine$ cd build/
Leou@Leou-PC:/media/Leou/qtwebengine/build$ qmake ../qtwebengine.pro -- -webengine-proprietary-codecs

输出信息：

Info: creating stash file /media/Leou/qtwebengine/build/.qmake.stash
Info: creating cache file /media/Leou/qtwebengine/build/.qmake.cache

Running configuration tests...
Checking for architecture supported... yes
Checking for bison... no
Checking for submodule initialized... yes
Checking for build path without whitespace... yes
Checking for platform supported... 
Checking for gperf... yes
Checking for flex... no
Checking for host pkg-config... /usr/bin/pkg-config
Checking for jumbo build merge limit... 8
Checking for linker supports -z noexecstack... yes
Checking for x11... yes
Checking for libdrm... yes
Checking for xcomposite... yes
Checking for xcursor... yes
Checking for xi... yes
Checking for xtst... yes
Checking for python2... /usr/bin/python2
Checking for d-bus... yes
Checking for fontconfig... yes
Checking for freetype >= 2.4.2... yes
Checking for glib-2.0 >= 2.32.0... yes
Checking for glibc > 2.16... yes
Checking for jsoncpp... no
Checking for khr... yes
Checking for lcms2... no
Checking for libevent... no
Checking for libvpx... no
Checking for libwebp, libwebpmux and libwebpdemux... no
Checking for compatible libxml2 and libxslt... no
Checking for minizip... no
Checking for system ninja... no
Checking for nss >= 3.26... yes
Checking for opus... no
Checking for protobuf... no
Checking for re2... no
Checking for snappy... no
Checking for zlib... yes
Done running configuration tests.

Configure summary:

Qt WebEngine Build Tools:
  Use System Ninja ....................... no
  Use System Gn .......................... no
  Jumbo Build Merge Limit ................ 8
  Developer build ........................ no
  Sanitizer .............................. no
  QtWebEngine required system libraries:
    fontconfig ........................... yes
    dbus ................................. yes
    nss .................................. yes
    khr .................................. yes
    glibc ................................ yes
  QtWebEngine required system libraries for qpa-xcb:
    x11 .................................. yes
    libdrm ............................... yes
    xcomposite ........................... yes
    xcursor .............................. yes
    xi ................................... yes
    xtst ................................. yes
  Optional system libraries used:
    re2 .................................. no
    icu .................................. no
    libwebp, libwebpmux and libwebpdemux . no
    opus ................................. no
    ffmpeg ............................... no
    libvpx ............................... no
    snappy ............................... no
    glib ................................. yes
    zlib ................................. yes
    minizip .............................. no
    libevent ............................. no
    jsoncpp .............................. no
    protobuf ............................. no
    libxml2 and libxslt .................. no
    lcms2 ................................ no
    png .................................. no
    JPEG ................................. no
    harfbuzz ............................. no
    freetype ............................. yes

Note: The following modules are not being compiled in this configuration:
    webenginecore
    webengine
    webenginewidgets
    pdf
    pdfwidgets

WARNING: Tool bison is required to build QtWebEngine.

WARNING: Tool bison is required to build QtPdf.

WARNING: QtWebEngine will not be built.

WARNING: QtPdf will not be built.

Qt is now configured for building. Just run 'make'.
Once everything is built, you must run 'make install'.
Qt will be installed into '/home/Leou/Qt/5.15.2/gcc_64'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

查看输出信息并安装缺失的库：

安装bison

sudo apt install bison

安装flex

sudo apt install flex

安装后，疑似有缓存，所以导致未更新，可删除build下的产物，再运行一次qmake ../qtwebengine.pro -- -webengine-proprietary-codecs

输出信息：

Leou@Leou-PC:/media/Leou/QtSrc/Src/qtwebengine/build$ qmake ../qtwebengine.pro -- -webengine-proprietary-codecs

Running configuration tests...
Done running configuration tests.

Configure summary:

Qt WebEngine Build Tools:
  Use System Ninja ....................... no
  Use System Gn .......................... no
  Jumbo Build Merge Limit ................ 8
  Developer build ........................ no
  Sanitizer .............................. no
  QtWebEngine required system libraries:
    fontconfig ........................... yes
    dbus ................................. yes
    nss .................................. yes
    khr .................................. yes
    glibc ................................ yes
  QtWebEngine required system libraries for qpa-xcb:
    x11 .................................. yes
    libdrm ............................... yes
    xcomposite ........................... yes
    xcursor .............................. yes
    xi ................................... yes
    xtst ................................. yes
  Optional system libraries used:
    re2 .................................. no
    icu .................................. no
    libwebp, libwebpmux and libwebpdemux . no
    opus ................................. no
    ffmpeg ............................... no
    libvpx ............................... no
    snappy ............................... no
    glib ................................. yes
    zlib ................................. yes
    minizip .............................. no
    libevent ............................. no
    jsoncpp .............................. no
    protobuf ............................. no
    libxml2 and libxslt .................. no
    lcms2 ................................ no
    png .................................. no
    JPEG ................................. no
    harfbuzz ............................. no
    freetype ............................. yes
Qt WebEngineCore:
  Embedded build ......................... no
  Full debug information ................. no
  Pepper Plugins ......................... yes
  Printing and PDF ....................... yes
  Proprietary Codecs ..................... yes
  Spellchecker ........................... yes
  Native Spellchecker .................... no
  WebRTC ................................. yes
  PipeWire over GIO ...................... no
  Geolocation ............................ yes
  WebChannel support ..................... yes
  Kerberos Authentication ................ no
  Extensions ............................. yes
  Node.js ................................ no
  Support qpa-xcb ........................ yes
  Use ALSA ............................... yes
  Use PulseAudio ......................... yes
Qt WebEngineQml:
  Support Qt WebEngine Qml ............... yes
  UI Delegates ........................... yes
  Test Support ........................... no
Qt WebEngineWidgets:
  Support Qt WebEngine Widgets ........... yes
Qt PDF:
  Support V8 ............................. no
  Support XFA ............................ no
  Support XFA-BMP ........................ no
  Support XFA-GIF ........................ no
  Support XFA-PNG ........................ no
  Support XFA-TIFF ....................... no
Qt PDF Widgets:
  Support Qt PDF Widgets ................. yes

WARNING: Building without node.js will disable some features of QtWebEngine DevTools.

Qt is now configured for building. Just run 'make'.
Once everything is built, you must run 'make install'.
Qt will be installed into '/home/Leou/Qt/5.15.2/gcc_64'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

执行make

make -j14

如果出错，则多执行几次make命令

执行结束后：

mv -f libqwebengineview.so ../../../plugins/designer/libqwebengineview.so
objcopy --only-keep-debug ../../../plugins/designer/libqwebengineview.so ../../../plugins/designer/libqwebengineview.so.debug && objcopy --strip-debug ../../../plugins/designer/libqwebengineview.so && objcopy --add-gnu-debuglink=../../../plugins/designer/libqwebengineview.so.debug ../../../plugins/designer/libqwebengineview.so && chmod -x ../../../plugins/designer/libqwebengineview.so.debug
make[3]: 离开目录“/media/Leou/QtSrc/Src/qtwebengine/build/src/plugins/qwebengineview”
make[2]: 离开目录“/media/Leou/QtSrc/Src/qtwebengine/build/src/plugins”
rm -f libQt5PdfWidgets.so.5.15.2 libQt5PdfWidgets.so libQt5PdfWidgets.so.5 libQt5PdfWidgets.so.5.15
g++ -Wl,--no-undefined -Wl,--version-script,QtPdfWidgets.version -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,\$ORIGIN -Wl,-rpath,\$ORIGIN -Wl,-rpath-link,/home/Leou/Qt/5.15.2/gcc_64/lib -shared -Wl,-Bsymbolic-functions -Wl,-soname,libQt5PdfWidgets.so.5 -o libQt5PdfWidgets.so.5.15.2 .obj/qpdfview.o  -L/home/qt/openssl-1.1.1g/lib /media/Leou/QtSrc/Src/qtwebengine/build/lib/libQt5Pdf.so /home/Leou/Qt/5.15.2/gcc_64/lib/libQt5Widgets.so /home/Leou/Qt/5.15.2/gcc_64/lib/libQt5Gui.so /home/Leou/Qt/5.15.2/gcc_64/lib/libQt5Core.so -lpthread -lGL   
ln -s libQt5PdfWidgets.so.5.15.2 libQt5PdfWidgets.so
ln -s libQt5PdfWidgets.so.5.15.2 libQt5PdfWidgets.so.5
ln -s libQt5PdfWidgets.so.5.15.2 libQt5PdfWidgets.so.5.15
rm -f ../../lib/libQt5PdfWidgets.so.5.15.2
mv -f libQt5PdfWidgets.so.5.15.2 ../../lib/libQt5PdfWidgets.so.5.15.2
rm -f ../../lib/libQt5PdfWidgets.so
rm -f ../../lib/libQt5PdfWidgets.so.5
rm -f ../../lib/libQt5PdfWidgets.so.5.15
mv -f libQt5PdfWidgets.so ../../lib/libQt5PdfWidgets.so
mv -f libQt5PdfWidgets.so.5 ../../lib/libQt5PdfWidgets.so.5
mv -f libQt5PdfWidgets.so.5.15 ../../lib/libQt5PdfWidgets.so.5.15
objcopy --only-keep-debug ../../lib/libQt5PdfWidgets.so.5.15.2 ../../lib/libQt5PdfWidgets.so.5.15.2.debug && objcopy --strip-debug ../../lib/libQt5PdfWidgets.so.5.15.2 && objcopy --add-gnu-debuglink=../../lib/libQt5PdfWidgets.so.5.15.2.debug ../../lib/libQt5PdfWidgets.so.5.15.2 && chmod -x ../../lib/libQt5PdfWidgets.so.5.15.2.debug
make[2]: 离开目录“/media/Leou/QtSrc/Src/qtwebengine/build/src/pdfwidgets”
make[1]: 离开目录“/media/Leou/QtSrc/Src/qtwebengine/build/src”

可以看到lib下的产物

安装

直接替换安装当前Qt 的 QWebEngine

make install

测试

使用Qt的simplebrowser demo程序打开 html5test 网站测试功能：

可见已经支持了h264、mp3等音视频功能。

总结

在Linux上编译QWebEngine总体上比较容易，没有编译chromium那么困难。

https://doc.qt.io/qt-5/qtwebengine-platform-notes.html文章来源地址https://www.toymoban.com/news/detail-754046.html

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