delphi DSPACK视频开发|笨鱼技术网

你把DSPack2.34版的Demo\D6-D7\VideoCap调出来，在上面放置一个新的TFilter(DSPACK里的)控件,属性name设成VCompFilter，属性FilterGraph留空，属性BaseFilter点击...进去选择你要用的压缩插件，XVID放在VideoCompressors的项目分类里，完整名称应该是XviD MPEG-4 Codec，选定后点击OK回到Form画面

主要Form的左下方有个Start的Button，把OnClick的事件调出来，会看到里面有一行注解着//Connect Video preview (VideoWindow)的RenderStream的过程

// now render streams
with CaptureGraph as IcaptureGraphBuilder2 do
begin
// set the output filename
SetOutputFileName(MEDIASUBTYPE_Avi, PWideChar(CapFile), multiplexer, Writer);

    // Connect Video preview (VideoWindow)
    if VideoSourceFilter.BaseFilter.DataLength > 0 then
      RenderStream(@PIN_CATEGORY_PREVIEW, nil, VideoSourceFilter as IBaseFilter,
        nil , VideoWindow as IBaseFilter);

    // Connect Video capture streams
    if VideoSourceFilter.FilterGraph <> nil then
      RenderStream(@PIN_CATEGORY_CAPTURE, nil, VideoSourceFilter as IBaseFilter,
        nil, multiplexer as IBaseFilter);

    // Connect Audio capture streams
    if AudioSourceFilter.FilterGraph <> nil then
    begin

      RenderStream(nil, nil, AudioSourceFilter as IBaseFilter,
        nil, multiplexer as IBaseFilter);
    end;
end;

把这两行红色RenderStream的第四个参数nil改成VCompFilter as IBaseFilter，然后编译这个程序。。。就可以达到你要的功能了