PPAPI开发之路(二)在VS 2013上编译media_stream_video例子

本例子工程代码下载地址:http://download.csdn.net/detail/y601500359/9862413

一、源码路径

例子源码在你nacl_sdk安装目录下,比如我的是:E:SDK acl_sdkpepper_49examplesapimedia_stream_video

二、新建vs项目

1、新建一个名为media_stream_video的Win32项目,类型选DLL;



2、去掉预编译头文件stdafx.h和stdafx.cpp,去掉dllmain.cpp文件;

3、在项目属性–>配置属性–>C/C++–>预编译头,把预编译头选项的值设置为不使用预编译头。

4、删除自动生成的media_stream_video.cpp。

5、在“配置属性–>C/C++–>代码生成–>运行库”中设置为MT

6、将例子下的media_stream_video.cc,复制到刚刚创建的工程目录;


7、添加media_stream_video.cc到工程


8、设置包含的nacl_sdk头文件目录;


9、将nacl_sdk安装目录下的lib文件copy到我们的工程:我是在工程目录建了一个lib文件夹

我的目录是:E:SDK acl_sdkpepper_49libwin_x86_32_host,注意debug文件夹下的对应我们的debug工程,release对应release,


将lib添加进工程


设置lib路径


10、编译:平台选择x86 或者 PPAPI都行

三、本地调试PPAPI插件

1、在工程目录新建一个名为:media_stream_video.html的脚本,js脚本如下:

<!DOCTYPE html>
<html>
  <!--
  Copyright 2014 The Chromium Authors. All rights reserved.
  Use of this source code is governed by a BSD-style license that can be
  found in the LICENSE file.
  -->
<head>
  <title>Media Stream Video Example</title>
  <script type="text/javascript">
    var plugin;
    var stream;

    function handleMessage(message) {
      console.log(message);
    }

    function success(s) {
      stream = s;
      plugin.postMessage({command: 'init', track: stream.getVideoTracks()[0]});
    }

    function failure(e) {
      console.log(e);
    }

    function initialize() {
      plugin = document.getElementById('plugin');
      plugin.addEventListener('message', handleMessage, false);
      var constraints = {
        audio: false,
        video: {
          mandatory: {
            minWidth: 640,
            minHeight: 320,
            minFrameRate: 30
          },
          optional: []
        }
      };

      navigator.webkitGetUserMedia(constraints, success, failure);
    }

    function changeFormat(format) {
      plugin.postMessage({command:'format', format: format});
    }

    function changeSize(width, height) {
      plugin.postMessage({command:'size',  width, height: height});
    }
    document.addEventListener('DOMContentLoaded', initialize, false);
  </script>
</head>

<body>
  <h1>Pepper MediaStream Video API Example</h1><br>
  This example demonstrates receiving frames from a video MediaStreamTrack and
  rendering them in a plugin.<br>
  Left side shows YUV frames. Right side shows BGRA frames.
  <embed id="plugin" type="application/x-ppapi-example-media-stream-video"
  width="640" height="240"/>
  <h2>Format:</h2><br>
  <button onclick="changeFormat('YV12')" >YV12</button>
  <button onclick="changeFormat('I420')" >I420</button>
  <button onclick="changeFormat('BGRA')" >BGRA</button>
  <button onclick="changeFormat('DEFAULT')" >DEFAULT</button>
  <h2>Size:</h2><br>
  <button onclick="changeSize(72, 72)" >72 x 72</button>
  <button onclick="changeSize(640, 360)" >640 x 360</button>
  <button onclick="changeSize(1280, 720)" >1280 x 720</button>
  <button onclick="changeSize(0, 0)" >DEFAULT</button>
</body>
</html>



2、运行命令:

chrome --register-pepper-plugins="E:\TestPromedia_stream_videoDebugmedia_stream_video.dll#ppexample##1.0.0;application/x-ppapi-example-media-stream-video" file:///E:/TestPro/media_stream_video/media_stream_video.html




为什么插件没有被加载呢,原因是我们的chrome设置有问题,因为我们需要渲染,设置如图:

然后显示结果如图:



原文地址:https://www.cnblogs.com/SunkingYang/p/11049165.html