问题描述
当我将QtWebEngine实例指向html5测试页面时（）我看到了WebM视频，Theora视频，但没有看到H.264 / MP4。
When I point the QtWebEngine instance at a html5 test page (http://www.quirksmode.org/html5/tests/video.html) I see the WebM video, the Theora video, but not H.264/MP4.
说要从源代码构建qtwebengine，所以我正在构建所有内容。
Enabling mp4/mpeg4/avc support for Qt5 WebEngine on Linux said to build qtwebengine from source, so I'm building everything.
我下载了这个源代码包：
I downloaded this source package:http://download.qt.io/official_releases/qt/5.5/5.5.0/single/qt-everywhere-opensource-src-5.5.0.zip
我按照指示其他依赖项，然后尝试使用这些命令构建：
I followed the directions for other dependencies, and then tried building with these commands:
configure -prefix %QT_ROOT%\build -opengl dynamic -release -nomake examples -opensource -confirm-license -qt-libpng -qt-libjpeg -openssl -qt-pcre -no-cups -no-dbus -skip qtwebkit -skip qtconnectivity -skip qtdoc -skip qtgraphicaleffects -skip qtsensors -skip qtserialport -skip qtwebkit-examples -skip qtquick1 -skip qt3d -skip qtwebengine
nmake
nmake install
cd qtwebengine
..\build\bin\qmake WEBENGINE_CONFIG+=use_proprietary_codecs qtwebengine.pro
nmake
nmake install
然后当我构建针对我的新构建的Web浏览器示例，我得到与以前相同的结果。当我试图寻找它构建或不构建编解码器的证据时，我看到ffmpegsumo.dll已经创建。我在javascript控制台中看到没有关于此的错误。我已经测试了除quicksmode之外的其他测试网页，也没有结果。
Then when I build the web browser example against my new build, I get the same results as before. When I try to look for evidence that it did or didn't build the codecs, I see that ffmpegsumo.dll was created. I see no errors in the javascript console about this. I've tested with other test web pages beyond quicksmode and no results there either.
推荐答案
我的解决方案是升级到Qt 5.6 0.1。否则，我按照原始问题中的指示，这次得到了一个工作结果。最值得注意的是， qmake WEBENGINE_CONFIG + = use_proprietary_codecs 确实确认它正在检查和配置h264和mp3。
My solution was to upgrade to Qt 5.6.1. Otherwise, I followed the directions in the original question and this time got a working result. Most notable, the qmake WEBENGINE_CONFIG+=use_proprietary_codecs did confirm it was checking and configuring h264 and mp3.
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